Error performance analysis of optical communication over Lognormal-Rician turbulence channel using Gram-Charlier Series

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Maoke Miao ◽  
Xiaofeng Li
Keyword(s):  
Error Rate ◽  
Symbol Error Rate ◽  
High Signal ◽  
Free Space Optical ◽  
Error Performance ◽  
Maximum Ratio Combining ◽  
Rate Analysis ◽  
De Algorithm ◽  
Shift Keying ◽  
The Impact

Abstract In this paper, the symbol-error rate (SER) performance of a coherent free-space optical (FSO) communication system in lognormal-Rician turbulence channel is analyzed using the generalized Gram-Charlier (GCC) series. We proposed the differential evolution (DE) algorithm to solve the parameters in GCC efficiently. It is shown that highly accurate closed-form SER expressions are obtained for M-ary phase-shift keying (MPSK) and M-ary quadrature amplitude modulation (MQAM) schemes with maximum ratio combining (MRC) technique. The asymptotic error rate analysis is presented to reveal the performance behavior in the high signal-to-noise (SNR) regime. The effects of imperfect phase noise compensation on the error rate performance are also studied, and it is found that the impact of phase compensation error can be small enough with loop SNR ρ c more than seven.

Error-rate analysis of the OFDM for correlated Nakagami-m fading channel by using maximal-ratio combining diversity

2011 ◽  
Vol 3 (6) ◽  
pp. 717-726 ◽  
Author(s):  
Vivek K. Dwivedi ◽  
Ghanshyam Singh
Keyword(s):  
Error Rate ◽  
Fading Channel ◽  
Communication Systems ◽  
Orthogonal Frequency Division Multiplexing ◽  
Mathematical Expression ◽  
Moment Generating Function ◽  
Symbol Error Rate ◽  
Maximal Ratio Combining ◽  
Rate Analysis ◽  
Shift Keying

In this paper, we have analyzed the performance of correlated Nakagami-m fading channel by using the maximal-ratio-combing diversity at the receiver. A closed-form mathematical expression is derived for the average bit error rate (BER) for binary phase-shift keying (BPSK) and average symbol-error-rate (SER) for M-Quardrature amplitude modulation (M-QAM) scheme in terms of the higher transcendental function such as Appell hypergeometric function by using the well-known moment generating function (MGF)-based approach with arbitrary fading index for the orthogonal frequency division multiplexing (OFDM) communication systems. Moreover, we also derived an expression for the outage probability and the proposed numerical results are compared with the reported literature.

scholarly journals OFDM Systems: Symbol Error Rate Evaluation, Filter Bank Design and Joint Maximum Likelihood Detection

2021 ◽  
Author(s):  
Yuhong Wang
Keyword(s):  
Error Rate ◽  
Symbol Error Rate ◽  
Time Frame ◽  
Detection Algorithm ◽  
Phase Detector ◽  
Ofdm Systems ◽  
Ofdm System ◽  
Error Performance ◽  
Shift Keying ◽  
Rate Evaluation

A closed-form symbol error rate (SER) formula for a generic OFDM system with M-ary phas shift keying (MPSK) modulation, and optimal phase detector for each subchannel, is derived. by employing the derived SER formula as the objective function, a novel OFDM system based on designed complex-valued unitary filter banks is presented to minimize the SER. A detection algorithm is presented for a generic OFDM system to jointly detect subchannel symbols received in one time frame. Monte-Carlo numerical simulations are performed to verify the theoretical SER analysis and compare the error performance of the proposed OFDM system with DFT-based OFDM and DWMT systems, and the new joint detection algorithm with the cinventional subchannel detection algorithm. The above efforts provide systematic approaches for the OFDM error performance analysis and the OFDM system design.

On the End-to-End Performance of a Mixed RF-FSO link with a Decode-and-Forward Relay

2019 ◽  
Vol 40 (3) ◽  
pp. 323-332 ◽  
Author(s):  
Himanshu Khanna ◽  
Mona Aggarwal ◽  
Swaran Ahuja
Keyword(s):  
Atmospheric Turbulence ◽  
Error Rate ◽  
Path Loss ◽  
Symbol Error Rate ◽  
Free Space Optical ◽  
Short Term ◽  
Decode And Forward ◽  
Pointing Error ◽  
The Impact

Abstract In this paper, we investigate the performance of a decode-and-forward relayed mixed radio frequency-free space optical (RF-FSO) dual-hop link. The transmitter to receiver link’s first-hop is a RF channel and the second-hop is a FSO channel. The RF link experiences long-term shadowing and short-term multi-path fading effects, while the FSO channel suffers atmospheric turbulence fading, path loss, and pointing error-induced misalignment fading. The performance of the system is analyzed considering the impact of these parameters. We model the RF link by generalized-K fading distribution and the atmospheric turbulence over the FSO link by the gamma–gamma fading. The expressions in closed form for the outage probability, symbol error rate for the system employing $q$-ary PSK modulation schemes, and the channel capacity of the system are derived. The obtained numerical results are also depicted by numerical plots.

scholarly journals OFDM Systems: Symbol Error Rate Evaluation, Filter Bank Design and Joint Maximum Likelihood Detection

2021 ◽  
Author(s):  
Yuhong Wang
Keyword(s):  
Error Rate ◽  
Symbol Error Rate ◽  
Time Frame ◽  
Detection Algorithm ◽  
Phase Detector ◽  
Ofdm Systems ◽  
Ofdm System ◽  
Error Performance ◽  
Shift Keying ◽  
Rate Evaluation

A closed-form symbol error rate (SER) formula for a generic OFDM system with M-ary phas shift keying (MPSK) modulation, and optimal phase detector for each subchannel, is derived. by employing the derived SER formula as the objective function, a novel OFDM system based on designed complex-valued unitary filter banks is presented to minimize the SER. A detection algorithm is presented for a generic OFDM system to jointly detect subchannel symbols received in one time frame. Monte-Carlo numerical simulations are performed to verify the theoretical SER analysis and compare the error performance of the proposed OFDM system with DFT-based OFDM and DWMT systems, and the new joint detection algorithm with the cinventional subchannel detection algorithm. The above efforts provide systematic approaches for the OFDM error performance analysis and the OFDM system design.

Performance Analysis of FSO DF Relays with Log-Normal Fading Channel

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Ha Duyen Trung
Keyword(s):  
Performance Analysis ◽  
Error Rate ◽  
Communication Systems ◽  
Free Space Optical ◽  
Error Performance ◽  
Relay Nodes ◽  
Decode And Forward ◽  
Log Normal ◽  
Optimal Average ◽  
The Impact

AbstractThis paper studies the bit error performance analysis of decode-and-forward (DF) relays-based free-space optical (FSO) communication systems using avalanche photodiode (APD). The system uses subcarrier intensity binary phase shift keying (BPSK) modulated signals and subjects to scintillation due to optical turbulence. A log-normal random process is considered to model the received signal intensity fluctuation for a clear-air condition (weak atmospheric turbulence) scenario. Mathematical expressions of the average bit error probability and bit error rate (BER) are derived by taking into account the impact of atmospheric loss, thermal-noise and shot-noise limited conditions. It can be inferred from the numerical results that using DF relay nodes can extend the transmission distance and minimize BER performance of FSO system significantly compared with the direct transmission. Moreover, the selection of APD’s gain values is essential to minimize the system’s error rate performance. Therefore, the system could achieve the minimal BER by selecting an optimal average APD gain value appropriately. Moreover, the optimal average gain values of APD significantly depend on various conditions, such as the bit rate, total transmitted power, and the number of relay nodes.

Symbol error rate analysis of non-orthogonal multiple access systems

2021 ◽  
Vol 46 ◽  
pp. 101295
Author(s):  
Ali Mohammed A. Alkhazzar ◽  
Hassan Aghaeinia
Keyword(s):  
Error Rate ◽  
Multiple Access ◽  
Symbol Error Rate ◽  
Rate Analysis
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