On the design of good LDPC codes with joint genetic algorithm and linear programming optimization

Amirzadeh, Ahmadreza; Taieb, Mohamed Haj; Chouinard, Jean‐Yves

doi:10.1109/cwit.2017.7994822

Cited by 2 publications

(2 citation statements)

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“…. (43) For all channel states , ̅ ( , , π(1)) can be approximated as ̅ ( , , π(1)) = ̅ ,0 −1 ( , , π(1)) [40], where ̅ ,0 is a constant and independent on the channel state, ( , , π(1)) represents the theoretical achievable rate of user under channel matrix . In the following, we derive ( , , π(1)).…”

Section: Figure 7 the Relationship Between The Output And Input Ei Fmentioning

confidence: 99%

“…For the first aspect, firstly consider the complexity for the optimization of the LDPC compression code, i.e., the problem (28). The complexity is ( ) , wherein ( ) is the complexity of LP [43] (usually a polynomial of the variable number ), q denotes the number of the discrete values of ̅ for exhaustive searching, and Q is the number of channel states (since (28) should be solved for each channel state). Secondly, consider the degree profile optimization for Raptor code, i.e., problem (53).…”

Section: Complexity Analysismentioning

confidence: 99%

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Rateless Coded Multi-User Uplink Transmission With Distributed Fronthaul Compression in Cloud RAN

Fan

Meng

2020

IEEE Access

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In this paper, we design the rateless coded uplink transmission in cloud radio access network (C-RAN) with two users, two remote radio heads (RRHs), and one baseband processing unit (BBU) pool under block fading channel. Each user sends the Raptor coded signals continuously until receiving ACK from the BBU pool. A distributed fronthaul compression scheme with LDPC code is proposed for the RRHs which can reduce the compression loss without increasing the fronthaul traffic, through leveraging the correlation between the received signals at both RRHs. To guarantee the compression performance, the LDPC code profile is optimized based on extrinsic information transfer (EXIT) analysis. Furthermore, the Raptor code profiles applied at the two users are also jointly optimized to improve the average system throughput. Simulation results show that the proposed transmission scheme with the optimized LDPC compression code and Raptor code can achieve good BER and throughput performance. INDEX TERMS Cloud radio access network, distributed fronthaul compression, LDPC code, Raptor code, degree profile optimization.

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Section: Figure 7 the Relationship Between The Output And Input Ei Fmentioning

confidence: 99%

Section: Complexity Analysismentioning

confidence: 99%