Relevant bibliographies by topics / OQPSK

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
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Academic literature on the topic 'OQPSK'

Author: Grafiati
Published: 4 June 2021
Last updated: 17 June 2025

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Journal articles on the topic "OQPSK"

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Stanley, Alphyn, and R. K. Sharma. "Very Large Scale Integrated-Circuit Architecture for Offset Quadrature Phase Shift Keying Modulation Using Offset Generator." Sensor Letters 17, no. 11 (2019): 884–87. http://dx.doi.org/10.1166/sl.2019.4142.

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This work presents an architecture for Offset Quadrature Phase Shift Keying (OQPSK) using an Offset generator. The Offset generator generates symbol patterns such that there is a maximum phase shift of ±90° only between the symbols, unlike the Quadrature Phase Shift Keying (QPSK) modulator which has a maximum of ±180° phase shift. Here the effort of designing an Offset generator, which can be embedded onto QPSK modulator to generate OQPSK with minimum combinational logic, has been discussed. Whenever the input symbols to the Offset generator varies in phase with a ±180° in constellation, it generates an intermediate symbol which differs only in ±90° with the previous one. Then it continues to give out the original symbol to be transmitted. This follows the exact OQPSK technology while it doesn't follow the conventional generation method of OQPSK modulation which provides an offset between the even and odd bit patterns of the symbols to be transmitted. The architecture is modelled using Verilog HDL and the functionality is validated from the simulation result.
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Zhou, Xiao, Chengyou Wang, and Ruiguang Tang. "Channel Estimation Based on IOTA Filter in OFDM/OQPSK and OFDM/OQAM Systems." Applied Sciences 9, no. 7 (2019): 1454. http://dx.doi.org/10.3390/app9071454.

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In this paper, we present a study of bit error rate (BER) for orthogonal frequency division multiplexing/offset quadrature phase shift keying (OFDM/OQPSK) and OFDM/offset quadrature amplitude modulation (OQAM) systems with an isotropic orthogonal transfer algorithm (IOTA) filter. The novel noise suppression method based on an IOTA filter is proposed to reduce the error of channel estimation caused by additive white Gaussian noise (AWGN). The OFDM/OQPSK and OFDM/OQAM systems do not insert the guard interval (GI) and pilots in the signal frames, thus they possess transmission efficiency. An analysis was carried out for convolutional coded OFDM/OQPSK and OFDM/OQAM systems in Rayleigh fading channels with generator polynomials and constraint lengths. Compared with conventional OFDM/QPSK and OFDM/QAM systems with the insertion of comb-type pilots, the proposed IOTA filter-based channel estimation method can provide significant energy per bit to time-varying noise power spectral density ratio gains over time and frequency-selective propagation Rayleigh fading channels in OFDM/OQPSK and OFDM/OQAM systems.
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Kumari, Pooja, Khaparkar Shailesh, and Sahu Pankaj. "Implementation of MSK Modulation Scheme for Zigbee System IEEE 802.15.4 Physical Layer." International Journal of Trend in Scientific Research and Development 2, no. 4 (2019): 2510–15. https://doi.org/10.31142/ijtsrd14609.

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In this work physical layer simulation of IEEE 802.15.4 ZigBee protocol has been done. The proposed work is the implementation of ZigBee system according to the protocol description. In this work we have simulated ZigBee system first with conventional OQPSK modulation technique, then the simulations are performed for MSK modulation, which is through OQPSK modulation. Simulation results for BER showing the average 79.43 improvement in BER for Proposed MSK compared with OQPSK modulation scheme. For a target BER of 10 2 the SNR required is 4 dB for this work i.e. for MSK, as compared to 10 dB for conventional OQPSK. Hence, an improvement of 6 dB less SNR. For a target BER of 10 2 the SNR required is 4 dB for this work i.e. for MSK, as compared to 5.2 dB with 1 . Hence, an improvement of 1.2 dB less SNR. Kumari Pooja | Shailesh Khaparkar | Pankaj Sahu "Implementation of MSK Modulation Scheme for Zigbee System / IEEE 802.15.4 Physical Layer" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-4 , June 2018, URL: https://www.ijtsrd.com/papers/ijtsrd14609.pdf
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Du, Qiao Ling, Zhi Rui Wang, Yu Pei, and Yi Ding Wang. "Performance Analysis of OQPSK Signals with Bi-Kappa Noise for Wireless Sensor Networks." Applied Mechanics and Materials 330 (June 2013): 957–60. http://dx.doi.org/10.4028/www.scientific.net/amm.330.957.

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This paper investigates the performance analysis of OQPSK in HF band for wireless sensor networks. An analytical model for getting symbol error rate (SER) is given in presence of Bi-Kappa noise in HF band. And the SER of OQPSK is given in AWGN and Rayleigh fading channel. Simulation results HF noise as Bi-Kappa noise should be investigated in HF band for WSN.
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Nugroho, Prapto. "Design of a 20 Mbps OQPSK Modulator Based on Multiplexers." JURNAL INFOTEL 16, no. 4 (2024): 855–70. https://doi.org/10.20895/infotel.v16i4.1237.

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This paper aims to delve into the design and implementation aspects of an OQPSK (Offset Quadrature Phase Shift Keying) modulator within the context of modem technology, underscoring its pivotal role in contemporary information technology infrastructure. The research primarily focuses on elucidating the theoretical foundations of OQPSK modulation, which represents an enhancement of QPSK modulation techniques. Central to the design is the utilization of a multiplexer to select one carrier signal out of four, which is subsequently modulated by data bits. Furthermore, the modulator employs two square wave signals phased 90 degrees apart, which are transformed into differential sinusoidal signals to constitute the carrier signal. Operating frequencies encompass a 5 MHz streaming data bits frequency and a 10 MHz clock frequency. Simulation results validate the efficacy of the OQPSK modulator by demonstrating its capability to generate modulated signals at a robust data transfer rate of 20 Mbps. This underscores the modulator's effectiveness in transmitting digital data over analog communication channels. In conclusion, the designed OQPSK modulator exemplifies its proficiency in efficiently modulating and demodulating signals, thereby bolstering connectivity and communication across diverse societal sectors. This research contributes significantly to the advancement of modem technology, which is indispensable for the expansion and maintenance of modern communication networks, ensuring robust connectivity in the digital age.
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Parkash, Sooraj, Amita Banga, and Dinesh Kumar. "PERFORMANCE ENHANCEMENT OF DWDMFSO SYSTEM UNDER DIVERSE WEATHER CONDITIONS WITH OPTIMIZED MODULATION FORMAT." International Journal of Engineering Applied Sciences and Technology 7, no. 9 (2023): 147–55. http://dx.doi.org/10.33564/ijeast.2023.v07i09.022.

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This paper is successfully demonstrating simulating comparison and investigation of 48 channels of dense wavelength division multiplexing free space optical (DWDM−FSO) network with a 10 GB/s data rate on each channel separated by 100 GHz frequency spacing under a clear sky, haze and light rain climate conditions. Apart from this, comparison of a series of modulation formats such as non−return to zero (NRZ), return to zero (RZ), carrier suppressed return to zero (CSRZ), Soliton pulse, and offset quadrature phase shift keying (OQPSK) have been performed and optimized the performance of the designed system with best suited modulated system. The performance of the proposed work has been evaluated in terms of bit error rate (BER), quality factor (Q), signal−to−noise ratio (SNR), received signal power and eye diagrams. It has been observed that OQPSK modulated system has shown more robust performance as compared to other line encoding techniques. The minimum simulation work reports for OQPSK modulated system have been recorded with the acceptable performance BER ≤ 10−10, Q ≥ 6 dB at the 2000 meters FSO link range.
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Li, Zhong Wei, and Rui He Wang. "Comparative Analysis on OQPSK and QDPSK of Continuous Pressure Wave System in Drilling Fluid Channel." Applied Mechanics and Materials 130-134 (October 2011): 3607–15. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.3607.

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Based on the urgent needs for high transmission speed and high reliability of wireless MWD, the OQPSK modulation of the drilling fluid continuous wave signal is proposed in this article. The Principle of delay orthogonal modulation and coherent demodulation of OQPSK are studied, and the changes in the phase vector of the inputted bit sequence are analyzed; according to the principle of continuous wave generation, the phase adjustment mechanism of rotary value are analyzed and the relationship between the signal waveform, as well as the rotational speed when adjusting the phase, is studied; the information transmission rate, band efficiency and bit error rate of the OQPSK and QDPSK continuous wave communication systems are comparatively analyzed and simulated. The results show that OQPSK eliminates the phase transition of π, which belongs to constant envelope modulation, is suitable for the transmission under low SNR drilling fluid channel, meanwhile simplifies the phase adjustment and reduces generator design. QDPSK can simplify the computational complexity of phase adjustment, and reduces the design difficulty of the continuous-wave generator’s control circuit. The rotary valve forms of "slow down - speed up" and " speed up - slow down " are suitable for π / 2 and 3π / 2 phase jump respectively; the motor control modes which combine closed loop position and closed loop velocity can achieve phase stable signal and reduce the dynamic torque of the motor; in the same carrier frequency and SNR, the information rate and bandwidth efficiency of both OQPSK’s and QDPSK’s are twice as those of the two-phase shift keying system’s, and they can improve the wireless transmission performance of MWD system.
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Raphaeli, Dan. "A Reduced Complexity Equalizer for OQPSK." IEEE Transactions on Communications 58, no. 1 (2010): 46–51. http://dx.doi.org/10.1109/tcomm.2010.01.0801922.

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Alatwi, Aadel M., and Ahmed Nabih Zaki Rashed. "Hybrid CPFSK/OQPSK modulation transmission techniques' performance efficiency with RZ line coding based fiber systems in passive optical networks." Indonesian Journal of Electrical Engineering and Computer Science 21, no. 1 (2021): 263–70. https://doi.org/10.11591/ijeecs.v21.i1.pp263-270.

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This study shows hybrid continuous-phase frequency shift keying (CPFSK)/optical quadrature-phase shift keying (OQPSK) modulation transmission techniques’ performance efficiency with return-to-zero (RZ) line coding scheme based fiber systems in passive optical networks. Max. Q factor/min. bit error rate variations versus modulation frequency and fiber length are studied in detail for various bits/symbol, based on hybrid proposed modulation transmission techniques. Also, optical power and received electrical power variations are simulated with fiber-length variations at a specified modulation frequency of 300GHz. Max. Q Factor, min. BER, max. signal power, and min. noise power variations are based on hybrid modulation techniques for CPFSK/OQPSK of 32 bits/symbol and a modulation frequency of 500GHz through a fiber length of 30km.
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Al- Azzawi, Fatima faydhe, Faeza Abas Abid, and Zainab faydhe Al-Azzawi. "Performance Comparison between DPSK and OQPSK modulation approaches in multi environments channels with Matlab Simulink models." Wasit Journal of Engineering Sciences 7, no. 1 (2019): 30–39. http://dx.doi.org/10.31185/ejuow.vol7.iss1.112.

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Phase shift keying modulation approaches are widely used in the communication industry. Differential phase shift keying (DPSK) and Offset Quadrature phase shift keying (OQPSK) schemes are chosen to be investigated is multi environment channels, where both systems are designed using MATLAB Simulink and tested. Cross talk and unity of signals generated from DPSK and OQPSK are examined using Cross-correlation and auto-correlation, respectively. In this research a proposed system included improvement in bit error rate (BER) of both systems in the additive white Gaussian Noise (AWGN) channel, by using the convolutional and block codes, by increasing the ratio of energy in the specular component to the energy in the diffuse component (k) and the diversity order BER in the fading channels will be improved in both systems.
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Dissertations / Theses on the topic "OQPSK"

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Fan, Tiange, Kung Yao, and Don Whiteman. "ADAPTIVE EQUALIZATION FOR OQPSK THROUGH A FREQUENCY SELECTIVE FADING CHANNEL." International Foundation for Telemetering, 2000. http://hdl.handle.net/10150/606497.

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International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California<br>Spectral sidelobes of QPSK, OQPSK, IJF-OQPSK, and SQAM modulated signals after nonlinear amplification are compared. It is known that OQPSK has lower spectral sidelobes than QPSK. However, in the presence of frequency selective fading, a decision-feedback adaptive equalizer is able to equalize the QPSK signal but not the OQPSK signal. By using phase pre-distortion on the OQPSK waveform before nonlinear amplification, not only is the adaptive equalizer able to equalize this signal, its spectral sidelobes are also reduced. Simulations are presented to confirm these results.
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Xingwen, Ding, Song Jianyong, Chen Ming, and Lu Manhong. "A Modified OQPSK Detection for SOQPSK-TG in Aeronautical Telemetry." International Foundation for Telemetering, 2014. http://hdl.handle.net/10150/577448.

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ITC/USA 2014 Conference Proceedings / The Fiftieth Annual International Telemetering Conference and Technical Exhibition / October 20-23, 2014 / Town and Country Resort & Convention Center, San Diego, CA<br>SOQPSK-TG is a highly bandwidth-efficient constant-envelope modulation so that it has been applied in aeronautical telemetry widely. We develop a simple detection of SOQPSK-TG which is based on a modified OQPSK detection. The simple detection has the advantages of low complexity and good performance. And it's also suitable for other varieties of SOQPSK and FQPSK.
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Lee, Tong-Fu, Shih-Ho Wang, and Chia-Liang Liu. "FQPSK-O: An Improved Performance Constant Envelope Modulation Scheme for OQPSK." International Foundation for Telemetering, 1998. http://hdl.handle.net/10150/607387.

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International Telemetering Conference Proceedings / October 26-29, 1998 / Town & Country Resort Hotel and Convention Center, San Diego, California<br>A new constant envelope modulation scheme for OQPSK, called FQPSK-O, is presented. This modulation technique is an extension of the Feher Quadrature Shift Keying (FQPSK) patented technologies, see Ref[l]. This scheme uses cubic spline interpolation to generate very smooth baseband waveforms in order to increase the spectral and power efficiency. Being a constant envelope modulation, FQPSK-O can operate with class C power amplifier without spectrum regrowth. We achieve a more compact spectrum with comparable bit error rate performance. For example, the spectrum of FQPSK-O is 25% narrower than that of GMSK with BT(b)=0.3 and FQPSK-1 with hardlimiter [2] at -40 dB attenuation point. For coherent demodulation under AWGN channel, FQPSK-O has almost the same BER performance as FQPSK-1 with hardlimiter. Both of them are better than GMSK with BT(b)=0.3 for BER < 10^-4. In Rayleigh fading channel, FQPSK-O outperforms GMSK with BT(b)=0.3 by 2 dB. FQPSK-O is an excellent scheme for wireless and satellite communications which require high spectral and power efficiency.
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Ahmad, Jamil. "All digital OQPSK demodulation for an on-board processing multicarrier demodulator." Thesis, University of Surrey, 1992. http://epubs.surrey.ac.uk/843678/.

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New payload concepts of low cost earth stations for future mobile satellite communications can only be realised by using dedicated on-board processing satellites. The satellite uplink and downlink are optimised by the use of FDMA/SCPC for uplink and TDM on the down link. This scheme allows mobile transmitters to transmit a narrow band, low power signal, resulting in smaller dishes and HPAs with lower output power. On the uplink, there are hundreds of FDM channels to be demodulated on-board. The most promising approach is the use of all-digital multicarrier demodulators (MCDs), where analogue and digital hardware are efficiently shared amongst the channels and digital signal processing is used at an early stage to take advantage of VLSI technology. A MCD consists of a channeliser for separation of FDM channels followed by individual demodulators for each channel. The major research areas in MCD's are efficient implementation of channelisers and the optimal demodulation algorithms for the demodulator. This thesis is focused on the demodulator part of an MCD using OQPSK modulation which haye received attention recently due to its spectral advantages in non-linear mobile satellite channels. Most of the research carried out on the OQPSK modulation has been addressed to its spectral performance under satellite channel non-linearities, but little attention has been paid to efficient receiver designs. The most important requirements of the demodulator in a mobile environment is fast acquisition with minimum overhead. This over-head includes long preambles in data frames to aid the acquisition of the carrier and the symbol timing recovery loops. In this thesis, research on preambleless all-digital demodulators for OQPSK has been carried out. The performance of the most suitable OQPSK synchronisation algorithms have been evaluated using extensive computer simulations. These algorithms have been selected after a comprehensive survey of digital synchronisation techniques. It is shown how these algorithms are related to the maximum likelihood (ML) principle and these algorithms are classified according to their technique of parameter extraction from the likelihood function. The synchronisation problems associated with OQPSK are pointed out with possible solutions. On the basis of the performance results of individual synchronisers, various demodulation algorithms for OQPSK have been developed for fixed, mobile and deep space applications. The DSP implementation of the all- digital OQPSK demodulator developed for the MCD for mobile applications is described in detail and its performance compared with simulation results.
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Xingwen, Ding, Zhai Wantao, Song Jianyong, and Chen Ming. "A Comparison of Coherent Detectors for SOQPSK-TG." International Foundation for Telemetering, 2015. http://hdl.handle.net/10150/596420.

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ITC/USA 2015 Conference Proceedings / The Fifty-First Annual International Telemetering Conference and Technical Exhibition / October 26-29, 2015 / Bally's Hotel & Convention Center, Las Vegas, NV<br>SOQPSK-TG is a highly bandwidth-efficient constant-envelope modulation so that it has been applied in airspace telemetry widely. We compare four types of coherent detectors for SOQPSK-TG, which are optimal detector, pulse truncation (PT) detector, standard OQPSK detector and modified OQPSK detector. The simulation and analysis results indicate that PT detector has the advantages of low complexity and good performance, so it has more practicality value.
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Wickert, Mark, Shaheen Samad, and Bryan Butler. "AN ADAPTIVE BASEBAND EQUALIZER FOR HIGH DATA RATE BANDLIMITED CHANNELS." International Foundation for Telemetering, 2006. http://hdl.handle.net/10150/604050.

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ITC/USA 2006 Conference Proceedings / The Forty-Second Annual International Telemetering Conference and Technical Exhibition / October 23-26, 2006 / Town and Country Resort & Convention Center, San Diego, California<br>Many satellite payloads require wide-band channels for transmission of large amounts of data to users on the ground. These channels typically have substantial distortions, including bandlimiting distortions and high power amplifier (HPA) nonlinearities that cause substantial degradation of bit error rate performance compared to additive white Gaussian noise (AWGN) scenarios. An adaptive equalization algorithm has been selected as the solution to improving bit error rate performance in the presence of these channel distortions. This paper describes the design and implementation of an adaptive baseband equalizer (ABBE) utilizing the latest FPGA technology. Implementation of the design was arrived at by first constructing a high fidelity channel simulation model, which incorporates worst-case signal impairments over the entire data link. All of the modem digital signal processing functions, including multirate carrier and symbol synchronization, are modeled, in addition to the adaptive complex baseband equalizer. Different feedback and feed-forward tap combinations are considered as part of the design optimization.
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Pessoa, Ricardo Jorge Ramos. "Desenho de sinais de elevada eficiência de potência para sistemas de comunicações móveis." Master's thesis, Faculdade de Ciências e Tecnologia, 2012. http://hdl.handle.net/10362/8674.

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Nelson, N. Thomas. "Space-Time Coding with Offset Modulations." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd2155.pdf.

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Hung, Tzu-Cheng, and 洪梓城. "Simulation of DS/SS-OQPSK Communication System." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/80594771948865430284.

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碩士<br>中華科技大學<br>電子工程研究所碩士班<br>100<br>This paper constructs the Direct Sequence Spread Spectrum(DS/SS)-Offset Quadrature Phase Shift Keying (OQPSK) communication system and conducts signal simulation analysis. First, it discusses the principle and architecture of the DS/SS-OQPSK communication system, which then designs, simulates and verifies the system by taking the Visual Studio C# software as the development tool. The transmitter then computes the spread spectrum codes for the input data during the In-Phase and Quadrature-Phase by adopting the Gold sequence and Kasami sequence respectively. It then modulates the signal data in branch I and Q by the means of OQPSK, which transmits the signal simulated by this system. At the receiver, it initially carries out the received signal then computes the non-coherent and despread spectrum means, which adds to the interference of White Gaussian Noise (WGN) channel. It also analyzes and explores the synchronization problems such as Phase-Locked Loop (PLL), Acquisition and Tracking respectively. Finally, the DS/SS-OQPSK communication system discussed in this paper, which is conducted in the WGN interference environment, can simulate and restore the binary sequence data signal correctly.
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Justo, Diogo Miguel Vitorino. "Técnicas Combinadas de Decomposição de Constelações e Modulação em Magnitude para Transmissão Mono-Portadora Eficiente: Prova de Conceito em Plataformas SDR." Master's thesis, 2018. http://hdl.handle.net/10316/86438.

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Dissertação de Mestrado Integrado em Engenharia Electrotécnica e de Computadores apresentada à Faculdade de Ciências e Tecnologia<br>Atendendo as exigências tecnológicas face ao crescente uso de serviços multimédia e streaming em ambiente móvel, há um grande esforço para que as comunicações consigam acompanhar este aumento de consumo de largura de banda. Desta forma, é esperado que o futuro das redes wireless passe pelo uso de ondas milimétricas. As ondas milimétricas permitem que as antenas convencionais sejam substituídas por antenas de menor dimensão, podendo ser agrupadas formando um esquema de múltipla entrada e múltipla saída (MIMO). Com este conceito é possível aumentar os ganhos de capacidade. No entanto, as ondas milimétricas ao operarem a uma largura de banda elevada, revelam algumas limitações, nomeadamente, perdas em espaço livre, efeitos de difração e perdas por obstáculos, mas também dificuldades de implementação em hardware, nomeadamente ao nível da eficiência do andar front-end de amplificação. Nesta dissertação, é feito foco na transmissão do dispositivo móvel para a estação base, onde as restrições de consumo de potência do front-end de amplificação são mais relevantes devido as limitações de bateria dos dispositivos móveis. Considera-se, por isso, o uso de comunicações mono-portadora (SC - Single Carrier), uma vez que os sinais transmitidos apresentam uma razão potência de pico vs potência média (PAPR) menor que as comunicações multi-portadora (MC Multi Carrier). Contudo as comunicações SC que fazem uso de constelações de ordem elevada (M-QAM) e em que é usado filtragem de Nyquist próxima da banda mínima de forma a conseguir um aumento de eficiência espectral, produzem sinais com um PAPR elevado. Nesta dissertação é apresentada uma técnica para decompor qualquer constelação M-ária como uma soma de várias componentes polares. Assim, uma vez que os sinais OQPSK têm baixas flutuações em envolvente, devido ao seu desfasamento temporal entre a componente em fase e a componente em quadratura, é possível amplificar de forma eficiente as diversas componentes OQPSK combinando as mesmas posteriormente formando uma constelação de ordem elevada. Combinando a técnica de decomposição com técnicas de modulação em magnitude em anel (RMM - Ring Magnitude Modulation) é possível uma amplificação eficiente com recurso a amplificadores não lineares. Realizou-se um desempenho por simulação sendo apresentado resultados obtidos através da curva de BER para o caso de M=16 e foi feito uma prova de conceito implementando a referida técnica em plataformas de rádio definidas por software.<br>With regard to the technological demands associated with an increasingly larger usage of multimedia services and streaming in mobile environments, there is a considerable effort to ensure that communications can keep in line with this bandwidth growing consumption. It is, therefore, expected that the future of wireless networks lies in millimetric waves. In fact, millimetric waves allow replacing conventional antennas with smaller ones that can be grouped together to create multiple input multiple output schemes (MIMO). This concept enables increasing capacity gains. Millimetric waves operating at a high bandwidth, however, reveal some limitations, namely, free space losses, diffraction effects, as well as losses related with obstacles. Not only these, but there are also hardware implementation adversities, specifically regarding the efficiency level of the front-end level of amplification.The focus of this thesis is the transmission from the mobile device to the base station, where the power consumption restrictions of the amplification's front-end are more relevant, given the limitations associated with mobile devices' batteries. For that reason, the usage of Single Carrier (SC) communications is considered, since the transmitted signals result in a lower Peak-to-Average Power Ratio (PAPR) when compared to Multi Carrier (MC) communications. Nevertheless, SC communications that make use of M-ary Quadrature Amplitude Modulation (M-QAM) and in which minimal band, Nyquist filtering is used to achieve a higher spectral efficiency, produce higher PAPR signals. In this dissertation, a technique that allows decomposing any M-ary constellation in a sum of several polar components is presented. This way, and because OQPSK signals possess low envelope fluctuations, (related with the time lag between their phase and quadrature components), IT is possible to amplify efficiently the different OQPSK components, and combining them after in order to form a high order constellation. By associating the decomposition technique with Ring Magnitude Modulation (RMM) techniques, an efficient amplification can be obtained, when relying on non-linear amplifiers. A simulation performance was executed, with the obtained results being presented through a BER curve, where M=16, and a proof of concept was conducted, by implementing the mentioned technique in software-defined radio platforms.<br>FCT
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Books on the topic "OQPSK"

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Lee, Chen-Hui. The application of TSI-OQPSK modulation in hard-limiting satellite amplifiers. UMIST, 1996.

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Book chapters on the topic "OQPSK"

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Zhu, HongLi, and Xia Sun. "Design and Realization of OQPSK Modulation Circuit Based on FPGA." In Proceedings of the 2012 International Conference on Cybernetics and Informatics. Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-3872-4_184.

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Chinna Veeresh, A., S. Venkata Siva Prasad, S. V. Hari Prasad, M. Soundarakumar, and Vipin Tyagi. "DSP Implementation of OQPSK Baseband Demodulator for Geosynchronous Multichannel TDMA Satellite Receiver." In Advances in Intelligent Systems and Computing. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-15-0637-6_22.

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Ovsyannikova, Anna, Sergey Makarov, and Ge Dong. "The Method of Generating Random OQPSK Signal Packets Based on Optimal FTN Pulses with Reduced PAPR and Frequency Band." In Springer Proceedings in Physics. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-81119-8_16.

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Korn, I. "QASK and OQASK." In Digital Communications. Springer US, 1985. http://dx.doi.org/10.1007/978-1-4684-1461-5_6.

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Ahmad, J., T. G. Jeans, and B. G. Evans. "DSP Based Carrier Recovery Technique For OQPSK Mobile Satellite Communications." In Signal Processing. Elsevier, 1992. http://dx.doi.org/10.1016/b978-0-444-89587-5.50121-3.

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Conference papers on the topic "OQPSK"

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Xingwen, D., S. Jianyong, C. Ming, and L. Manhong. "B7.7 - A modified OQPSK detection for MIL-STD SOQPSK in the satellite communication." In ETTC 2024 - European Test and Telemetry Conference. AMA Service GmbH, Von-Münchhausen-Str. 49, 31515 Wunstorf, 2024. https://doi.org/10.5162/ettc2024/b7.7.

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Raphaeli, Dan, and Udi Suissa. "A Reduced complexity equalizer for OQPSK." In 2008 3rd International Symposium on Communications, Control and Signal Processing (ISCCSP). IEEE, 2008. http://dx.doi.org/10.1109/isccsp.2008.4537379.

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Cézar, Zenildo, Ruan Delgado Gomes, and Anderson F. B. F. da Costa. "Data Center Monitoring using a IEEE 802.15.4/SUN Network in a Smart Campus Scenario." In Seminário Integrado de Software e Hardware. Sociedade Brasileira de Computação - SBC, 2023. http://dx.doi.org/10.5753/semish.2023.229844.

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Abstract:
Dentre os principais desafios para o monitoramento de Data Centers, pode-se elencar o grande número de parâmetros que podem influenciar no seu correto funcionamento (ex: temperatura, umidade, fontes de energia, entre outros). Dessa forma, o monitoramento dos Data Centers é de suma importância para evitar perdas, tanto no aspecto de dados (informações) quanto no aspecto financeiro. Este trabalho apresenta um sistema de monitoramento para Data Centers (DCMonitor), utilizando os conceitos de Smart Campus, Internet das Coisas (IoT) e Redes de Sensores Sem Fio (WSNs). O sistema foi implantado no Data Center de uma universidade, e foi realizado um experimento durante 15 dias, a fim de avaliar o desempenho da comunicação utilizando três diferentes modulações definidas pelo padrão IEEE 802.15.4g: SUN-FSK, SUN-OQPSK e SUN-OFDM. Como pode ser observado nos resultados obtidos, identificouse que a modulação que melhor se adequa ao cenário apresentado é a SUN-OQPSK.
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Peng, Hua, and Jing Li. "Cyclic spectrum based carrier recovery for OQPSK." In 2011 International Conference on Graphic and Image Processing. SPIE, 2011. http://dx.doi.org/10.1117/12.913521.

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Othman, Rami, Yves Louet, and Alexandre Skrzypczak. "A Reduced Complexity OQPSK-Type Detector for SOQPSK." In 2018 IEEE 88th Vehicular Technology Conference (VTC-Fall). IEEE, 2018. http://dx.doi.org/10.1109/vtcfall.2018.8690874.

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Li Fang, Ke Xizheng, and Li Qiang. "Design and Implement of OQPSK Modulator Based on FPGA." In 2007 8th International Conference on Electronic Measurement and Instruments. IEEE, 2007. http://dx.doi.org/10.1109/icemi.2007.4351297.

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Afonso, D., F. Cercas, R. Dinis, and R. Rodrigues. "Correlation of spreading sequences combined with nonlinear OQPSK signals." In IEEE EUROCON 2011 - International Conference on Computer as a Tool. IEEE, 2011. http://dx.doi.org/10.1109/eurocon.2011.5929244.

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Tan, Mingxin, Shuren He, Wenjun Song, Haizhong Liu, Zhixiong Liu, and Wenwen Fang. "Performance Analysis and Simulation of Both QPSK and OQPSK." In 2010 6th International Conference on Wireless Communications, Networking and Mobile Computing (WiCOM). IEEE, 2010. http://dx.doi.org/10.1109/wicom.2010.5600117.

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Sun, Houteng, Shengyuan Zhong, Jun Tang, and Jiangnan Yuan. "A Blind Estimation Method of QPSK/OQPSK Symbol Rate." In 2022 4th International Conference on Communications, Information System and Computer Engineering (CISCE). IEEE, 2022. http://dx.doi.org/10.1109/cisce55963.2022.9851129.

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Usha, S. M., and H. B. Mahesh. "Low Power and Area Optimized Architecture for OQPSK Modulator." In 2019 International Conference on Wireless Communications Signal Processing and Networking (WiSPNET). IEEE, 2019. http://dx.doi.org/10.1109/wispnet45539.2019.9032723.

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Reports on the topic "OQPSK"

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Sadinov, Stanimir, and Krasen Angelov. Study and Analysis of Performance Limits Due to Nonlinearities in OQPSK Modulated DWDM System. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, 2021. http://dx.doi.org/10.7546/crabs.2021.07.12.

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