SER analysis and power allocation for hybrid cooperative transmission system 被引量：2

SER analysis and power allocation for hybrid cooperative transmission system

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摘要 The symbol-error-rate（SER） and power allocation for hybrid cooperative（HC） transmission system are investigated.Closed-form SER expression is derived by using the moment generating function（MGF）-based approach.However,the resultant SER contains an MGF of the harmonic mean of two independent random variables（RVs）,which is not tractable in SER analysis.We present a simple MGF expression of the harmonic mean of two independent RVs which avoids the hypergeometric functions used commonly in previous studies.Using the simple MGF,closed-form SER for HC system with M-ary phase shift keying（M-PSK） signals is provided.Further,an approximation as well as an upper bound of the SER is presented.It is shown that the SER approximation is asymptotically tight.Based on the tight SER approximation,the power allocation of the HC system is investigated.It is shown that the optimal power allocation does not depend on the fading parameters of the source-destination（SD） channel and it only depends on the source-relay（SR） and relay-destination（RD） channels.Moreover,the performance gain of the power allocation depends on the ratio of the channel quality between RD and SR.With the increase of this ratio,more performance gain can be acquired. The symbol-error-rate（SER） and power allocation for hybrid cooperative（HC） transmission system are investigated.Closed-form SER expression is derived by using the moment generating function（MGF）-based approach.However,the resultant SER contains an MGF of the harmonic mean of two independent random variables（RVs）,which is not tractable in SER analysis.We present a simple MGF expression of the harmonic mean of two independent RVs which avoids the hypergeometric functions used commonly in previous studies.Using the simple MGF,closed-form SER for HC system with M-ary phase shift keying（M-PSK） signals is provided.Further,an approximation as well as an upper bound of the SER is presented.It is shown that the SER approximation is asymptotically tight.Based on the tight SER approximation,the power allocation of the HC system is investigated.It is shown that the optimal power allocation does not depend on the fading parameters of the source-destination（SD） channel and it only depends on the source-relay（SR） and relay-destination（RD） channels.Moreover,the performance gain of the power allocation depends on the ratio of the channel quality between RD and SR.With the increase of this ratio,more performance gain can be acquired.

作者 Guoyan Li Youguang Zhang Wang Kang

机构地区 School of Electronics and Information Engineering

出处《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2012年第5期661-670,共10页 系统工程与电子技术（英文版）

基金 supported by the National Basic Research Program of China (973 Program) (2010CB731803) the National Science Foundation for Innovative Research Groups of China (60921001)

关键词 cooperative transmission relaying protocols hybrid cooperation symbol-error-rate（SER） power allocation cooperative transmission relaying protocols hybrid cooperation symbol-error-rate（SER） power allocation

分类号 TN929.533 [电子电信—通信与信息系统] TP333 [自动化与计算机技术—计算机系统结构]

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