Stability Outage Analysis for LDPC Codes

2013 ◽  
Vol 791-793 ◽  
pp. 1525-1528
Author(s):  
Xiang Zhao Li ◽  
Chao Zhang
Keyword(s):  
Outage Probability ◽  
Fading Channel ◽  
Ldpc Codes ◽  
Ldpc Code ◽  
Channel Simulation ◽  
Awgn Channel ◽  
Simulation Results ◽  
The Stability ◽  
Block Fading Channel ◽  
Outage Analysis

stability outage probability of LDPC code is caused by the density evolution on given channel, we formulate the stability outage probability for block fading channel by researching the SOP for the BEC channel and AWGN channel, Simulation results show that how the class of capacity-achieving ensembles on the erasure channel is bounded away from the outage limit on a block fading channel by studying of the SOP for AWGN channel and BEC channel.

Performance Analysis of OQPSK Signals with Bi-Kappa Noise for Wireless Sensor Networks

2013 ◽  
Vol 330 ◽  
pp. 957-960
Author(s):  
Qiao Ling Du ◽  
Zhi Rui Wang ◽  
Yu Pei ◽  
Yi Ding Wang
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Performance Analysis ◽  
Error Rate ◽  
Fading Channel ◽  
Rayleigh Fading ◽  
Symbol Error Rate ◽  
Wireless Sensor ◽  
Channel Simulation ◽  
Simulation Results

This paper investigates the performance analysis of OQPSK in HF band for wireless sensor networks. An analytical model for getting symbol error rate (SER) is given in presence of Bi-Kappa noise in HF band. And the SER of OQPSK is given in AWGN and Rayleigh fading channel. Simulation results HF noise as Bi-Kappa noise should be investigated in HF band for WSN.

New GRP LDPC Codes for H-ARQ-IR Over the Block Fading Channel

2020 ◽  
Vol 68 (11) ◽  
pp. 6642-6656
Author(s):  
Chanki Kim ◽  
Sang-Hyo Kim ◽  
Jong-Seon No
Keyword(s):  
Fading Channel ◽  
Ldpc Codes ◽  
Block Fading Channel

An Improved Construction for Yielding Nonbinary LDPC Codes

2014 ◽  
Vol 556-562 ◽  
pp. 6307-6310
Author(s):  
Li Sheng Zhang ◽  
Zhi Peng Huang ◽  
Fan Xin Zeng
Keyword(s):  
Belief Propagation ◽  
Ldpc Codes ◽  
Construction Method ◽  
Decoding Algorithm ◽  
Construction Methods ◽  
Awgn Channel ◽  
Simulation Results ◽  
Nonbinary Ldpc Codes

In this paper, we investigate construction methods for producing nonbinary LDPC codes, and a family of nonbinary LDPC codes over is presented and its properties are derived. Compared to the second method presented by Ref. [5], simulation results show that the proposed LDPC codes perform well over the AWGN channel under belief propagation decoding algorithm and have an almost same BER curve as the ones in Ref. [5]. However, the resultant construction method is simpler than the latter’s.

Outage Analysis of Cooperative Communication Network with Hardware Impairments

Frequenz ◽  
2015 ◽  
Vol 69 (9-10) ◽  
Author(s):  
Kefeng Guo ◽  
Jin Chen ◽  
Yuzhen Huang
Keyword(s):  
Fading Channel ◽  
Rayleigh Fading ◽  
Cooperative Networks ◽  
Amplify And Forward ◽  
Hardware Impairments ◽  
Partial Relay Selection ◽  
Asymptotic Expressions ◽  
Simulation Results ◽  
The Impact ◽  
Outage Analysis

AbstractThe hardware impairments of physical transceivers that create distortions degrade the performance of communication. In this paper, we investigate the impact of hardware impairments on the outage performance of dual-hop amplify-and-forward (AF) cooperative networks with partial relay selection. Specifically, the approximated closed-form and asymptotic expressions for the outage probability of dual-hop AF relaying networks with hardware impairments are derived over Rayleigh fading channel, which provides a fast and efficient means to evaluate the impact of hardware impairments on the system performance. In addition, simulation results and intuitive discussions are provided to show the correctness of the analytical results. The finding of this paper suggests that the outage error floor exists when the hardware impairment exists.

scholarly journals Research on LDPC in an OFDM System

2021 ◽  
Vol 2078 (1) ◽  
pp. 012075
Author(s):  
Chong-Yue Shi ◽  
Hui Li ◽  
You-Ling zhou ◽  
Ping Wang ◽  
Qian Li ◽  
...  
Keyword(s):  
Fading Channel ◽  
Rayleigh Fading ◽  
Simulation Analysis ◽  
Ldpc Codes ◽  
Ldpc Code ◽  
Rayleigh Fading Channel ◽  
Code Length ◽  
Ofdm System ◽  
Number Of Iterations ◽  
Better Than

Abstract In this paper, LDPC codes and OFDM technologies are studied, and combines LDPC and OFDM to simulate and verify the performance. The encoding of LDPC and logarithmic domain BP decoding algorithm and the principle of OFDM are introduced. Through MATLAB, the simulation of OFDM-LDPC system in different channel, different code length, different iteration times, LDPC and OFDM-LDPC in the same conditions are compared. Through simulation analysis, we can know that the performance of OFDM-LDPC system will improve with the increase of the code length. When the SNR is small, the number of iterations has little effect on the performance of OFDM-LDPC system. When the SNR is large, the performance of the system will be improved with the increase of the number of iterations. The performance of OFDM-LDPC codes is better than that of LDPC codes. The performance of OFDM-LDPC code is better than LDPC code in multipath Rayleigh fading channel.

scholarly journals Efficient OFDM transceiver design for VLC sys-tems in fading channel

2018 ◽  
Vol 7 (1.8) ◽  
pp. 245
Author(s):  
Jayakumari J ◽  
Rakhi K J
Keyword(s):  
Fading Channels ◽  
Bit Error Rate ◽  
Fading Channel ◽  
Visible Light Communication ◽  
Communication Security ◽  
Rf Systems ◽  
High Data ◽  
Data Rates ◽  
Simulation Results ◽  
Rich Spectrum

With the widespread effective usage of LEDs the visible light communication (VLC) system has brought out an increasing interest in the field of wireless communication recently. VLC is envisioned to be an appealing substitute to RF systems because of the advantages of LEDs such as high communication security, rich spectrum, etc. For achieving bearable inter symbol interference (ISI) and high data rates, OFDM can be employed in VLC. In this paper, the performance of VLC system with popular unipolar versions of OFDM viz. Flip-OFDM and ACO-OFDM is analyzed in fading channels. From the simulation results it is seen that the Flip-OFDM-VLC system outperforms the ACO-OFDM-VLC system in terms of bit error rate and is well suited for future 5G applications.

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