Wireless Personal Communications

, Volume 83, Issue 2, pp 1331–1339 | Cite as

Upper Bounds on Overloaded LDPC–Optimum Combinied System Over Rayleigh Fading Channel



In this paper a closed form expression for the bit error rate of LDPC–OC system in the presence of interferers is derived over an i.i.d Rayleigh fading channel using message passing algorithm. All interferers are assumed to have equal power. The analysis is done for the case when the number of interferes is more than the number of receive antenna elements. In this paper, analytical results showed that for a BER of 10−2, the LDPC–OC system provides an additional gain of 6.3 dB over OC system alone. Both the systems provide identical diversity gain of 1.2 dB when the number of receive antennas are increased from 5 to 6.


Optimum combining Irregular low-density parity check codes Message passing algorithm Gaussian approximation approach 



This study is supported by UGC and AICTE India vide letter no 31-1(pun)/sr-2008 TU and letter number 8023/BOR/RID/RPS-105/2008-2009.


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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Department of Electronics and Communication EngineeringThapar University PatialaPatialaIndia

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