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Relevant bibliographies by topics / Symbol error rate / Dissertations / Theses

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Dissertations / Theses on the topic 'Symbol error rate'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Bage, Jayaraj Nagendra. "Minimum Symbol Error Rate Timing Recovery System." DigitalCommons@USU, 2010. https://digitalcommons.usu.edu/etd/684.

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This thesis presents a timing error detector (TED) used in the symbol timing synchronization subsystem for digital communications. The new timing error detector is designed to minimize the probability of symbol decision error, and it is called minimum symbol error rate TED (MSERTED). The new TED resembles the TED derived using the maximum likelihood (ML) criterion but gives rise to faster convergence relative to MLTED. The new TED requires shorter training sequences for symbol timing recovery. The TED operates on the outputs of the matched filter and estimates the timing offset. The S-curve is

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2

Zhou, Zhou. "MIMO-OFDM Symbol Detection via Echo State Networks." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/95945.

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Echo state network (ESN) is a specific neural network structure composed of high dimensional nonlinear dynamics and learned readout weights. This thesis considers applying ESN for symbol detection in multiple-input, multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) systems. A new ESN structure, namely, windowed echo state networks (WESN) is introduced to further improve the symbol detection performance. Theoretical analysis justifies WESN has an enhanced short-term memory (STM) compared with the standard ESN such that WESN can offer better computing ability. Additionally,

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3

Dsouza, Jennifer. "Analysis of RF Front-End Non-linearity on Symbol Error Rate in the Presence of M-PSK Blocking Signals." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/79489.

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Radio frequency (RF) receivers are inherently non-linear due to non-linear components contained within the RF front-end such as the low noise amplifier (LNA) and mixer. When receivers operate in the non-linear region, this will affect the system performance due to intermodulation products, and cross-modulation, to name a few. Intermodulation products are the result of adjacent channel signals that combine and create intermodulation distortion of the received signal. We call these adjacent channel signals blockers. Receiving blockers are unavoidable in wideband receivers and their effect must b

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4

Moore, Natalie. "The Effect of Receiver Nonlinearity and Nonlinearity Induced Interference on the Performance of Amplitude Modulated Signals." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/84899.

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All wireless receivers have some degree of nonlinearity that can negatively impact performance. Two major effects from this nonlinearity are power compression, which leads to amplitude and phase distortions in the received signal, and desensitization caused by a high powered interfering signal at an adjacent channel. As the RF spectrum becomes more crowded, the interference caused by these adjacent signals will become a more significant problem for receiver design. Therefore, having bit and symbol error rate expressions that take the receiver nonlinearity into account will allow for determinin

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5

Inturi, Satya Prakash Reddy, and Chaitanya Macherla. "System Performance of MIMO MRT/MRC System under Perfect CSI." Thesis, Blekinge Tekniska Högskola, Institutionen för datavetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-21137.

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Multiple Input and Multiple Output (MIMO) is one of the techniques used tiimprove the system performance. In this thesis, we improve and evaluate the system performance of MIMO deploying MRT technique at the transmitter and MRCtechnique at the receiver with an assuming that the system can obtain perfect CSI.We derived expressions for outage probability and symbol error rate and simulationgraphs for SISO, SIMO, MISO, and MIMO in terms of outage probability. Our results show that the MIMO system performance is better than other configurations.We also observed that SISO have the least performance

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6

Hloušek, Tomáš. "Rušení v bezdrátových sítích a jejich modelování (AWGN, Rayleigh, Rice fading channels)." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217537.

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This thesis describes and models wirelesss transmission intereferences in real communication channels. A signal received on a fading channel is subjected to a multiplicative distortion and to the usual additive noise. Real channel adds to the signal noise and fadings. Gaussian noise is a result of channel awgn. Fadings is implicated by multipath propagation of signal in Rayleigh and Rician channels. Main goal of this project is to program BERsolve, which is created in tool GUIDE in Matlab. User program BERsolve makes it possible to analyse bit error rate and symbol error rate for some types of

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7

Islam, Muhammad Adeel, and Khan Ahmad Shah. "Performance analysis of dual hop cellular networks." Thesis, Blekinge Tekniska Högskola, Sektionen för ingenjörsvetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3093.

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Explosive growth in wireless technology caused by development in digital and RF circuit fabrications put some serious challenges on wireless system designers and link budget planning. Low transmit power, system coverage and capacity, high data rates, spatial diversity and quality of services (QOS) are the key factors in future wireless communication system that made it attractive. Dual-hop relaying is the promising underlying technique for future wireless communication to address such dilemmas. Based on dual-hop relaying this thesis addresses two scenarios. In the first case the system model e

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8

Yagüe, Edgar Cámara, and José Manuel Menéndez Carretero. "Transparent Satellite Switching using Flexible Frequency-band Reallocation." Thesis, Linköping University, Department of Electrical Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-6856.

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<p>The society expects a global interconected digital communication system offering multimedia services, information on demand and interchange of information with a high data rates and low cost. </p><p>All this can not be realized with the terrestrial nets used nowadays cause it is necessary a high economic inversion to get a competitive capacity to interchange information between server and user. The next generation of satellite must have characteristics which improve the current generation, one important requirement is that the same satellite could make a treatment of the different input si

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9

Peh, Lin Kiat. "Performance comparison of two implementations of TCM for QAM." Thesis, Monterey, California. Naval Postgraduate School, 2007. http://hdl.handle.net/10945/55202.

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Approved for public release; distribution is unlimited.<br>Trellis-Coded Modulation (TCM) is employed with quadrature amplitude modulation (QAM) to provide error correction coding with no expense in bandwidth. There are two common implementations of TCM, namely pragmatic TCM and Ungerboeck TCM. Both schemes employ Viterbi algorithms for decoding but have different code construction. This thesis investigates and compares the performance of pragmatic TCM and Ungerboeck TCM by implementing the Viterbi decoding algorithm for both schemes with 16-QAM and 64-QAM. Both pragmatic and Ungerboeck TCM wi

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10

Pachai, Kannu Arun. "Communications over noncoherent doubly selective channels." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1173887288.

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11

Susanto, Misfa. "Network Coding for Multihop Wireless Networks: Joint Random Linear Network Coding and Forward Error Correction with Interleaving for Multihop Wireless Networks." Thesis, University of Bradford, 2015. http://hdl.handle.net/10454/14864.

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Optimising the throughput performance for wireless networks is one of the challenging tasks in the objectives of communication engineering, since wireless channels are prone to errors due to path losses, random noise, and fading phenomena. The transmission errors will be worse in a multihop scenario due to its accumulative effects. Network Coding (NC) is an elegant technique to improve the throughput performance of a communication network. There is the fact that the bit error rates over one modulation symbol of 16- and higher order- Quadrature Amplitude Modulation (QAM) scheme follow a certain

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12

YANG, YI-TUN, and 楊奕敦. "Effect Of DFE Length On Minimum Symbol Error Rate." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/38199465615130037538.

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碩士<br>淡江大學<br>電機工程學系<br>91<br>In this paper , first we will derive a generalized formula for the decision error probability for linear equalizer and decision feedback equalizer in bandlimited channels employing M-ary PAM transmission. The formula applies to any assignment of equalizer tap weights, whether the weights are in optimum condition or non-optimum condition. It is also valid for Minimum Mean Square Error(MMSE) and Zero forcing criterion. And it is valid for Least Mean Square, Recursive Least Square(RLS), or other algorithms. Next, by applying the gradient search method

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13

Liu, Wei-Hung, and 劉韋宏. "Symbol-Error-Rate Based Relay Selection for Two-Way Decode-and-Forward Relay Networks." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/88079644733875663021.

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碩士<br>國立清華大學<br>通訊工程研究所<br>100<br>In this thesis, we propose a single relay selection scheme based on symbol-error-rate (SER) performance analysis for two-way decode-and-forward (DF) relay networks. The proposed scheme aims at selecting the best relay that minimizes the overall average end-to-end SER of the system, where the multiple-access phase, along with the broadcasting phase, is considered. By contrast, the previous works only took the broadcasting phase to form their selection criteria. We first derive a closed-form average end-to-end SER of the system. Then the SER expression is furthe

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14

Tsai, Bo-Yi, and 蔡柏毅. "A Normalized Adaptive Turbo Equalization Based on Minimal Symbol-Error-Rate for MIMO SC-FDMA System." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/42983343053057957550.

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碩士<br>國立中興大學<br>通訊工程研究所<br>103<br>3GPP prescribes OFDMA is used to downlink transmission and SC-FDMA is for uplink transmission in the long term evolution (LTE) of cellular systems so as to make the mobile system power-efficient. A disadvantage of OFDMA is the high value of peak-to-average power ratio (PAPR), which raises the complexity and has lower power efficiency of a transmitter’s power amplifier. With a lower PAPR, the power amplifiers at mobile terminals employing SC-FDMA can be simpler and more power-efficient than they would be with OFDMA transmission. We apply the channel equalizer b

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15

Peng, Jui-Che, and 彭瑞哲. "Hybrid Amplify-and-Forward and Decode-and-Forward Relaying Method Based on Average Symbol Error Rate Analysis." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/57290794566287595366.

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碩士<br>國立中央大學<br>通訊工程學系<br>103<br>Using relays is an important technique to expand communication coverage in modern mobile communication systems. Amplify-and-Forward (AF) and Decode-and-Forward (DF) are the most two popular strategies in the relaying methods. AF has low complexity but the noise can be amplified while in contrast, DF improves transmission reliability in some situations using the coding scheme to suppress the noise. In this paper, we explore the symbol error probabilities of the AF and DF models for the hybrid AF/DF relaying strategy, in which the BPSK and M-QAM modulation types

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16

Lin, Ming-Hui, and 林明輝. "Symbol Error Rate Analysis of Enhanced Dynamic Decode-and-Forward Cooperative Network Coding in Two-Way Relay." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/58787411926984252634.

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碩士<br>國立中正大學<br>通訊工程研究所<br>101<br>We propose the enhanced dynamic decode-and-forward cooperative network coding (EDDF-CNC) system, which achieves good diversity-multiplexing gain tradeoff (DMT) and low outage probability. In this thesis, symbol error rate (SER) analysis is provided for a single relay of enhanced dynamic decode-and-forward cooperative network coding protocol in wireless network. Closed-form SER formulas for the cooperation system with PSK and QAM signals over Rayleigh and Nakagami-m fading channels has been derived. Moreover, the asymptotic approximations are established to sho

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17

Abuzaid, Abdulrahman I. "Joint Preprocesser-Based Detectors for One-Way and Two-Way Cooperative Communication Networks." Thesis, 2014. http://hdl.handle.net/10754/317256.

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Efficient receiver designs for cooperative communication networks are becoming increasingly important. In previous work, cooperative networks communicated with the use of L relays. As the receiver is constrained, channel shortening and reduced-rank techniques were employed to design the preprocessing matrix that reduces the length of the received vector from L to U. In the first part of the work, a receiver structure is proposed which combines our proposed threshold selection criteria with the joint iterative optimization (JIO) algorithm that is based on the mean square error (MSE). Our receiv

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18

Chou, Fu-Heng, and 周孚衡. "A Study of Graphical Symbol Recognition Rate and Analysis of Error and Confusion by Using Taoyuan Metro and Taiwan High Speed Railways for Examples." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/j4b3jq.

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碩士<br>國立交通大學<br>工業工程與管理系所<br>105<br>The study is focus on graphical symbol of Taiwan Railways and Taoyuan Metro. Use “Comprehension test” of ISO for method and analyze these graphical symbols’ comprehension rate which are not derived from international symbol organization. And analyze international graphical symbol which are same meaning but different graphics. For those graphical symbol don’t reach the 67% comprehension rate, this paper will give a full study and improved advices. The study shows that there are 14 graphical symbols don’t reach the standard (ATM, Money exchange, Car-parking, S

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19

"On the Ordering of Communication Channels." Doctoral diss., 2014. http://hdl.handle.net/2286/R.I.24798.

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abstract: This dissertation introduces stochastic ordering of instantaneous channel powers of fading channels as a general method to compare the performance of a communication system over two different channels, even when a closed-form expression for the metric may not be available. Such a comparison is with respect to a variety of performance metrics such as error rates, outage probability and ergodic capacity, which share common mathematical properties such as monotonicity, convexity or complete monotonicity. Complete monotonicity of a metric, such as the symbol error rate, in conjunction wi

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20

Padala, Akhila Naga Sree Ravali, and Kavya Kommana. "Performance of physical layer security with different service integrity parameters." Thesis, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-15872.

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Information security has been a very important issue in wireless networks. With the ever-increasing amount of data being exchanged over wireless networks, the confidentiality of information needs to be protected from unauthorized users called eavesdropper. Due to the broadcast nature of the wireless medium, the transmissions between legitimate users maybe overheard and intercepted by the unauthorized parties, which makes wireless transmission vulnerable to potential eavesdropping attacks. The security of wireless communications plays an increasingly important role in the cybercrime defense aga

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21

Nikjah, Reza. "Performance evaluation and protocol design of fixed-rate and rateless coded relaying networks." Phd thesis, 2010. http://hdl.handle.net/10048/1674.

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The importance of cooperative relaying communication in substituting for, or complementing, multiantenna systems is described, and a brief literature review is presented. Amplify-and-forward (AF) and decode-and-forward (DF) relaying are investigated and compared for a dual-hop relay channel. The optimal strategy, source and relay optimal power allocation, and maximum cooperative gain are determined for the relay channel. It is shown that while DF relaying is preferable to AF relaying for strong source-relay links, AF relaying leads to more gain for strong source-destination or relay-destinatio

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22

Das, Priyanka. "Optimal Relay Selection in Interference-Constrained Underlay Cooperative Cognitive Radio." Thesis, 2018. http://etd.iisc.ac.in/handle/2005/4137.

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Cognitive radio (CR) promises to significantly improve the utilization of scarce wireless spectrum. In the underlay mode of CR, which is the focus of the thesis, a secondary user (SU) can simultaneously transmit on the same band as a higher priority primary user (PU) so long as the interference it causes to the PU must be constrained. These interference constraints severely limit the performance of the SUs. Cooperative relaying combined with selection exploits spatial diversity to improve the performance of interference-constrained SUs. In it, one among the available relays is selected for eve

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