Bit-error rate analysis of low-density parity-check codes with generalised selection combining over a Rayleigh-fading channel using Gaussian approximation

2012 ◽  
Vol 6 (1) ◽  
pp. 90 ◽  
Author(s):  
B.S. Tan ◽  
K.H. Li ◽  
K.C. Teh
Keyword(s):  
Bit Error Rate ◽  
Fading Channel ◽  
Rayleigh Fading ◽  
Gaussian Approximation ◽  
Selection Combining ◽  
Low Density ◽  
Parity Check ◽  
Rate Analysis ◽  
Low Density Parity Check ◽  
Parity Check Codes

scholarly journals LDPC-Coded CAP with Spatial Diversity for UVLC Systems over Generalized-Gamma Fading Channel

Sensors ◽  
2020 ◽  
Vol 20 (12) ◽  
pp. 3378
Author(s):  
Hongyan Jiang ◽  
Hongbing Qiu ◽  
Ning He ◽  
Zhonghua Zhao ◽  
Wasiu Popoola ◽  
...  
Keyword(s):  
Characteristic Function ◽  
Bit Error Rate ◽  
Fading Channel ◽  
Visible Light Communication ◽  
Spatial Diversity ◽  
Modulation Scheme ◽  
Low Density ◽  
Parity Check ◽  
Generalized Gamma ◽  
Low Density Parity Check

In this paper, low-density parity-check (LDPC)-coded carrierless amplitude and phase (CAP) modulation with spatial diversity is proposed to mitigate turbulence-induced fading in an underwater visible-light communication (UVLC) channel. Generalized-gamma (GG) distribution was used to model the fading, as this model is valid for weak- and strong-turbulence regimes. On the basis of the characteristic function (CHF) of GG random variables, we derived an approximated bit-error rate (BER) for the CAP modulation scheme with spatial diversity and equal-gain combining (EGC). Furthermore, we simulated the performance of the CAP system with diversity and LDPC for various turbulence conditions and validated the analysis. Obtained results showed that the combination of LDPC and spatial diversity is effective in mitigating turbulence-induced fading, especially when turbulence strength is strong.

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