Optimal Relay Functionality for SNR Maximization in Memoryless Relay Networks
作者： Syed Ali Jafar , Krishna Srikanth Gomadam
DOI:
关键词:
摘要: We explore the SNR-optimal relay functionality in a \emph{memoryless} network, i.e. network where, during each channel use, signal transmitted by depends only on last received symbol at that relay. develop generalized notion of SNR for class memoryless functions. The solution to optimization problem leads novel concept minimum mean square uncorrelated error estimation(MMSUEE). For elemental case single relay, we show MMSUEE is function regardless source and transmit power, modulation scheme. This scheme, call estimate forward (EF), also shown be with PSK parallel network. demonstrate EF performs better than best amplify (AF) demodulate (DF), both serial networks. determine AF near-optimal low power while DF high hybrid networks contain elements, when robust performance desired, advantage over found significant. Error probabilities are provided substantiate gain obtained through optimality. that, \emph{Gaussian} inputs, AF, become identical.
arxiv.org参考文章(18)
Behnaam Aazhang, Mohammad Ali Khojastepour, Ashutosh Sabharwal, On the Capacity of 'Cheap' Relay Networks conference on information sciences and systems. ,(2003)
H. Vincent Poor, An introduction to signal detection and estimation (2nd ed.) Springer-Verlag New York, Inc.. ,(1994)
N. Hassanpour, A. El Gamal, Relay without delay ,(2006)
M. Gastpar, M. Vetterli, On the capacity of wireless networks: the relay case international conference on computer communications. ,vol. 3, pp. 1577- 1586 ,(2002) , 10.1109/INFCOM.2002.1019409
D. Guo, S. Shamai, S. Verdu, Mutual information and minimum mean-square error in Gaussian channels IEEE Transactions on Information Theory. ,vol. 51, pp. 1261- 1282 ,(2005) , 10.1109/TIT.2005.844072
Krishna Gomadam, Syed Jafar, On the Capacity of Memoryless Relay Networks international conference on communications. ,vol. 4, pp. 1580- 1585 ,(2006) , 10.1109/ICC.2006.255036
Deqiang Chen, J.N. Laneman, Modulation and demodulation for cooperative diversity in wireless systems IEEE Transactions on Wireless Communications. ,vol. 5, pp. 1785- 1794 ,(2006) , 10.1109/TWC.2006.1673090
A. Sendonaris, E. Erkip, B. Aazhang, User cooperation diversity. Part II. Implementation aspects and performance analysis IEEE Transactions on Communications. ,vol. 51, pp. 1939- 1948 ,(2003) , 10.1109/TCOMM.2003.819238
I. Abou-Faycal, M. Medard, Optimal uncoded regeneration for binary antipodal signaling international conference on communications. ,vol. 2, pp. 742- 746 ,(2004) , 10.1109/ICC.2004.1312600
I. Maric, R.D. Yates, Forwarding strategies for Gaussian parallel-relay networks international symposium on information theory. pp. 269- ,(2004) , 10.1109/ISIT.2004.1365307