Bit error rate analysis of chaotic cognitive radio system over slow fading channels

2015 ◽  
Vol 70 (11-12) ◽  
pp. 513-521 ◽  
Author(s):  
Lin Zhang ◽  
Huaiyin Lu ◽  
Zhiqiang Wu ◽  
Ming Jiang
Keyword(s):  
Cognitive Radio ◽  
Fading Channels ◽  
Bit Error Rate ◽  
Error Rate ◽  
Radio System ◽  
Cognitive Radio System ◽  
Rate Analysis ◽  
Slow Fading ◽  
Slow Fading Channels

scholarly journals Bit-Error-Rate Analysis of Raptor Codes over Rician Fading Channels

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Jingke Dai
Keyword(s):  
Fading Channels ◽  
Bit Error Rate ◽  
Error Rate ◽  
System Performance ◽  
Gaussian Approximation ◽  
Rician Fading ◽  
Raptor Codes ◽  
Erasure Channels ◽  
Rate Analysis ◽  
Rician Fading Channels

The bit-error-rate expressions of nonsystematic Raptor (NR) codes and systematic Raptor (SR) codes over Rician fading channels are first derived using a Gaussian approximation (GA) approach. These BER expressions provide a significant reduction in computational complexity for analyzing system performance when compared with simulation and discretized density evolution (DDE). As shown by the asymptotic analysis, the NR codes originally designed for binary erasure channels still have good performance on Rician fading channels but SR codes do not. Therefore, the degree distributions of SR codes are specifically optimized on Rician channels which are superior to the existing SR codes and comparable to NR codes.

scholarly journals Bit Error Rate Analysis of Cognitive Radio Network in the Presence of Primary Interference

2019 ◽  
Vol 8 (6S3) ◽  
pp. 1839-1843
Keyword(s):  
Cognitive Radio ◽  
Bit Error Rate ◽  
Error Rate ◽  
Orthogonal Frequency Division Multiplexing ◽  
Cognitive Radio Network ◽  
Primary User ◽  
Radio Network ◽  
Amplify And Forward ◽  
Rate Analysis ◽  
Primary Interference

In this paper, Bit Error Rate (BER) of Orthogonal Frequency Division Multiplexing (OFDM) based cognitive radio network is analyzed in the presence of Primary User Interference (PUI). Since, the PUI signal affects only few subcarriers of the OFDM signal, it can be modeled as a sparsity vector. In this network model, half duplex Amplify and Forward (AF) relaying is considered in the absence of direct link. Further, it is assumed that the network is operating in the overlay mode, thus the primary user transmitted signal act as interference at secondary user relay and destination nodes. In this paper, the PUI is mitigated using convex optimization. Bit Error Rate (BER) is analyzed using Quadrature Phase Shift Keying (QPSK) Modulation and Quadrature Amplitude Modulation (16-QAM). Simulation results conclude that after primary interference suppression, the performance of the proposed system is significantly improved.

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