空间双向中继多元调制编码系统及设计方法

doi:10.3969/j.issn.1000-436x.2014.10.002

Abstract

Abstract:

A non-binary irregular repeat-accumulate (IRA) modulation-coded physical-layer network coding (PNC) scheme was proposed for the space two-way relay channels (TWRC) to improve the information exchange rates of space information networks.In the scheme,a same non-binary IRA modulation code was employed at two users.This configuration enabled the recovery of the network coded information sequence from the superimposed signal directly by the relay.The optimized non-binary IRA modulation code was obtained by using extrinsic information transfer (EXIT) chart analysis.Numerical results demonstrate that the proposed scheme can reduce the duration of information exchange by about 48% compared to the conventional time divided multiple access scheme.

Key words: TWRC, non-binary modulation code, PNC, space network

Lei YANG,Song JIN,Bo-yang CAI,Jian-ping AN. Non-binary modulation-coded scheme for the space two-way relay channels[J]. Journal on Communications, 2014, 35(10): 9-16.

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码编号	优化信道	GF(p)	码率R_c	译码门限/dB	变量节点边的度分布(i,λ_i)和校验节点边的度分布(j,ρ_j)
C₁	TWRC	5	0.75	11.9	λ:(2,0.291 856) (3,0.172 519) (5,0.064 722) (6,0.253 136) (17,0.180 334) (18,0.037 433)ρ:(1,0.042 511) (3,0.957 489)
C₂	点到点	5	0.786 1	11.9	λ:(2,0.321 276) (3,0.141 693) (5,0.231 243) (6,0.085 720) (18,0.220 068) ρ:(1,0.035 593) (3,0.964 407)

Non-binary modulation-coded scheme for the space two-way relay channels

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