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Дисертації з теми "Noncoherent modulator"

Автор: Grafiati

Опубліковано: 28 травня 2022

Оновлено: 31 липня 2025

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1

Забегалов, І. В., С. Жук, Андрій Васильович Булашенко, Андрей Васильевич Булашенко та Andrii Vasylovych Bulashenko. "Моделювання некогерентного модулятора двусмугової амплітудної модуляції з передачею носійної". Thesis, Видавництво СумДУ, 2010. http://essuir.sumdu.edu.ua/handle/123456789/21057.

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2

Seet, Siong Leng Henry. "Analysis of noncoherent orthogonal modulation for mobile computing." Thesis, Monterey, California. Naval Postgraduate School, 2010. http://hdl.handle.net/10945/55206.

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Approved for public release; distribution is unlimited.<br>Wireless communication is employed to connect mobile computers in a networked environment for information exchange. In a tactical space, sensors and computers typically need to operate on-the-move while transmitting data over both short and long distances in different terrain and conditions. The wireless communication is thus susceptible to effects of Doppler shift and channel fading. In addition, when security and anti jamming features are required, such as frequency-hopping techniques, then coherent signal detection is difficult

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3

Raorane, Pooja Prakash. "Sampling Based Turbo and Turbo Concatenated Coded Noncoherent Modulation Schemes." University of Toledo / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1279071861.

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4

Xingwen, Ding, Zhong Yumin, Chang Hongyu, and Chen Ming. "Noncoherent Demodulation with Viterbi Decoding for Partial Response Continuous Phase Modulation." International Foundation for Telemetering, 2013. http://hdl.handle.net/10150/579651.

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ITC/USA 2013 Conference Proceedings / The Forty-Ninth Annual International Telemetering Conference and Technical Exhibition / October 21-24, 2013 / Bally's Hotel & Convention Center, Las Vegas, NV<br>With the characteristics of constant envelope and continuous phase, Continuous Phase Modulation (CPM) signal has higher spectrum efficiency and power efficiency than other modulation forms. A noncoherent demodulation with Viterbi decoding for partial response CPM signals is proposed. Simulation results indicate that the demodulation performance of proper partial response CPM is better than the tra

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5

Lin, Xu. "Trellis-coded permutation modulation for improved performance of narrowband noncoherent FSK." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-11072008-063438/.

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6

Vincent, Patrick J. "Effects of fading and data modulation on noncoherent m-sequence acquisition schemes." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/25877.

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Approved for public release; distribution is unlimited.<br>In direct-sequence spread-spectrum systems, successful communications require phase synchronization of the m-sequence in the incoming signal with a locally generated m-sequence at the receiver. Many acquisition schemes which extract the phase of an incoming m-sequence have been studied, but most of them assume coherent demodulation (which is usually not available during acquisition) and or independent samples (which introduce a loss in the effective signal to noise ratio (SNR)). This thesis investigates the performance of two m-sequenc

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7

Zeidler, Brandon J. "Noncoherent detection of pulse-position modulation with correlated Gaussian interference in a slowly fading two-path channel." Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2006. http://wwwlib.umi.com/cr/ucsd/fullcit?p3196544.

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Thesis (Ph. D.)--University of California, San Diego, 2006.<br>Title from first page of PDF file (viewed February, 2006). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 248-250).

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8

Culha, Onur. "Noncoherent Differential Demodulation Of Cpm Signals With Joint Frequency Offset And Symbol Timing Estimation." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613729/index.pdf.

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In this thesis, noncoherent differential demodulation of CPM signals with joint carrier frequency offset and symbol timing estimation is investigated. CPM is very attractive for wireless communications owing to major properties: good spectral efficiency and a constant envelope property. In order to demodulate the received CPM signal differentially, the symbol timing and the carrier frequency offset have to be estimated accurately. There are numerous methods developed for the purpose. However, we have not encountered studies (which are based on autocorrelation estimation and hence suitable for

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9

Zhao, Qing. "Advanced Synchronization Techniques for Continuous Phase Modulation." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/10486.

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The objective of this research work is to develop reliable and power-efficient synchronization algorithms for continuous phase modulation (CPM). CPM is a bandwidth and power efficient signaling scheme suitable for wireless and mobile communications. Binary CPM schemes have been widely used in many commercial and military systems. CPM with multilevel symbol inputs, i.e., M-ary CPM, can achieve a higher data rate than binary CPM. However, the use of M-ary CPM has been limited due to receiver complexity and synchronization problems. In the last decade, serially concatenated CPM (SCCPM) has drawn

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10

Raphaeli, Dan. "Noncoherent Coded Modulation." Thesis, 1994. https://thesis.library.caltech.edu/4944/1/Raphaeli_d_1994.pdf.

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<p>In this thesis, we are concerned with the transmission of data over noncoherent channels (the carrier phase is random). We consider a receiving system which does not attempt to estimate the carrier phase from the received data. Instead, the transmitter and receiver will be designed so that the data transmission is robust with respect to the unknown phase variations of the channel. For the transmitter, we propose new combined coding and modulation, specifically designed to match the noncoherent channel. For the receiver, efficient decoders to noncoherently decode the coded modulation are dev

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11

Chen, Liang-Twu, and 陳良圖. "Noncoherent Decoding for Trellis Coded Quadrature Amplitude Modulation." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/54660775495283366586.

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碩士<br>國立中央大學<br>電機工程研究所<br>90<br>In this thesis, we study the noncoherent decoding for trellis coded quadrature amplitude modulation. In Chapter 1, we introduce overall contents of this thesis. In Chapter 2, we review some relative noncoherent trellis coded modulation structures and noncoherent decoding algorithm. In Chapter 3, we propose a method by modifying Ungerboeck’s trellis coded quadrature amplitude modulation structure. We construct various trellis coded quadrature amplitude modulation structures for noncohernt decoding. We also verify the error performance of the proposed structures

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12

Gu, Shi-Shan, and 古士軒. "Noncoherent Block-Coded Modulation with Sixteen Signal Points." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/savz54.

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碩士<br>國立中央大學<br>通訊工程研究所<br>96<br>Two noncoherent block coding schemes, noncoherent block-coded 8PSK (NBC-8PSK) and noncoherent block-coded Twisted amplitude and phase shift keying using eight signal points(NBC-8TAPSK) were proposed, respectively. However, the data rate is not high since only eight signal points are used in both schemes. In this thesis, we discuss noncoherent block coding scheme with sixteen signal points, including 16TAPSK and quadrature amplitude modulation (16QAM). 16QAM is widely used for coherent communication. We derived the minimum noncoherent distance for block-coded 16

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13

Chan, Chih-Hsiang, and 詹智翔. "Iterative Phase Synchronization for Noncoherent Coded Modulation Systems." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/17543851505842793528.

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碩士<br>國立臺灣大學<br>電信工程學研究所<br>96<br>As communication systems operate at low signal-to-noise ratio conditions, synchronization may become a serious problem. In the thesis, we consider the coded modulation systems which are not explicitly provided with the information of coherent phases. We investigate algorithms for joint carrier phase estimation and ambiguity resolution for the AWGN channel. An easily-implemented serially-concatenated coding system is presented that can oper- ate with phase estimation technique which is integrated into the iterative decoding loop. At each iteration, we use soft

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14

Chan, Chih-Hsiang. "Iterative Phase Synchronization for Noncoherent Coded Modulation Systems." 2008. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-1107200818463300.

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15

Huang, Wan-Chun, and 黃琬珺. "Noncoherent Block Detection Algorithm for Orthogonal NFSK-LQAM Modulation." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/67792320318616040716.

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碩士<br>國立臺灣大學<br>電信工程學研究所<br>96<br>In this paper, we combine frequency and amplitude/phase modulation over frequency-nonselective channel which can be approximated well as a complex constant over one coherence interval. We investigate the noncoherent block modulation that is based on amplitude/phase constellations, that are more power efficiency than conventional differential phase shift keying and NFSK/LDPSK modulation. The GLRT decision rule jointly estimates the channel and the data, and does not require another overhead or pilot symbols, and the decision rule is also used to obtain low com

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16

Hsu, Chia-Jung, and 許家榮. "Code Searches for Coherent and Noncoherent Trellis-Coded Modulation." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/66716175201754498602.

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碩士<br>國立中央大學<br>通訊工程學系<br>104<br>Differential encoding (DE) is a classical technique at the transmitter that allows simple noncoherent detection at the receiver. On the other hand, trellis-coded modulation is a bandwidth efficient technique which offers reliable data transmission. In this paper, we consider TCM with DE for channel phase coherence over N = 3 symbols. First we do partitioning. Based on the set partitioning, trellis codes are searched and their minimum distances are analyzed. They are compared with the codes searched for N = 2. For both minimum distance and simulation results, th

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17

Jhang, Ya-ru, and 張雅茹. "Training-Based Symbol-Interleaved Trellis Coded Noncoherent Space-Time Modulation." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/sk3n82.

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碩士<br>國立中央大學<br>通訊工程研究所<br>97<br>The main goal of the next generation wireless communication systems provides high data rates and high mobile service for the Internet and multimedia applications. Space-time coding was one of the most effective techniques to combat fading and to provide high reliable transmission. A noncoherent space-time code named unitary space-time modulation(USTM) in which the transmit and the receive antennas do not know the channel state information; trellis coded USTM for the noncoherent block fading channel can obtain signigicant coding gains; the reviewed scheme propos

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18

Chen, Juin-Da, and 陳俊達. "Concatenated Space-Time Block Coding With Block Coded Modulation For Noncoherent detection." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/65678090342831840575.

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碩士<br>國立中央大學<br>通訊工程研究所<br>92<br>In this thesis, combing block coded modulation (BCM) and space-time block coding (STBC) with channel estimation is discussed. Taking advantage of the channel estimation using training symbols, noncoherent detection can be easily employed by STBC.The impact of STBC using training symbols concatanated with different block length of BCM is also investigate. Finally, we compare the system with unitary space-time modulation in the quasi-static flat fading channel

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19

Rahman, Md Anisur. "Noncoherently combined modulation-coding for frequency-hopping acquisitionless systems." Thesis, 1990. http://spectrum.library.concordia.ca/3776/1/NN64719.pdf.

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20

Shiau, Hau-Jung, and 蕭皓中. "LDPC coded noncoherent space-time modulation using information-bearing pilot and spacial multiplexing." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/59477035069365155449.

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碩士<br>國立清華大學<br>通訊工程研究所<br>99<br>In this thesis, we propose using two methods to improve the performanceof a noncoherent system using information-bearing pilot and spacial multiplexing. The former is based on EXIT(extrinsic information transfer) chart and the latter is based on the codeword-interleaving strategy. It is known that irregular low-density parity-check (LDPC) code is widely used for optimizing performance in various communication systems. However, in some cases, the Gaussian approximation for the soft values used in the conventional EXIT-chart-based optimization procedure may lose

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21

WEI, RUEY-YI, and 魏瑞益. "Two Topics on Communications: Coded Modulation for the Rayleigh Fading Channel and Noncoherent Detection." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/10400659664149788634.

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博士<br>國立臺灣大學<br>電機工程學系研究所<br>86<br>In this thesis, we study two topics on communications: coded modulation for the Rayleigh fading channel and noncoherent detection. In Chapter 2, by adding weight factors in calculating symbol metrics, a new upperbound on the pairwise error probabilty of MPSK sequences for the Rayleigh fading channel when CSI is absent is derived. Moreover, two appropiate multilevel coded modulation schemes are analyzed for the Rayleigh fading channel and giv

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22

Wu, Min-yu, and 吳民堉. "On the Study of Multi-User Raptor-coded Noncoherent Distributed Space-Time Modulation Schemes." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/s876f9.

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碩士<br>國立中山大學<br>通訊工程研究所<br>106<br>In this paper, we investigate multiuser Raptor-coded non-coherent distributed unitary space-time modulation (USTM) scheme, where consider a dynamic decode-and-forward(DF) cooperative communication scenario. In the distributed non-coherent unitary space-time modulation, the transmitter and receiver do not need to know the channel state information. Raptor code is a rate-less code that can adapt to rapidly changing channel environment, and has the characteristics of variable code-rate. In the distributed Relay network architecture, we use the non-coherent maximu

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23

Li, Yu-chen, and 李昱蓁. "Coherent and Noncoherent Space-Time Modulation for Single-Carrier Block Transmission over Frequency-Selective Channels." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/20556569555351308304.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>97<br>This dissertation includes two parts. The first part deals with time-reversal single carrier orthogonal space-time blocked technique employed in a multi-access CDMA uplink system over a quasi-static frequency selective fading channel. To avert the rate loss problem normally encounter in convolutionally coded space-time block modulation, we assign each user multiple spreading sequences so as to expand constellation size of orthogonal space-time codes. At receiver,one approaches, namely single-user detectors based on minimum mean-square error (MMSE) sense. Indeed

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