Joint power allocation for differentially modulated wireless relay networks

Sigit Aryo Pambudi; Bumsoo Lee; Chungyong Lee

doi:10.1109/TWC.2012.021512.111037

Joint power allocation for differentially modulated wireless relay networks

Sigit Aryo Pambudi, Bumsoo Lee, Chungyong Lee

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

This paper deals with the power allocation problem in a wireless relay network employing differential modulation technique and Alamouti distributed space-time code, where signals from both the direct and relay paths are taken into account in the detection process. We propose a sub-optimal power allocation scheme based on the maximization of an approximate receive covariance expression. The proposed scheme jointly allocates the transmit power of both the source and relay nodes under a total transmit power and per-node transmit power constraints. We can increase the effectiveness of the proposed power allocation algorithm by grouping the relays with respect to their individual covariances. Numerical experiments show that the proposed covariance maximization algorithm combined with the relay grouping algorithm offers a respectable BER performance improvement, compared to the conventional schemes. Finally, we demonstrate that the proposed scheme requires only a small number of iterations to achieve convergence, making it attractive to practical systems.

Original language	English
Article number	6155554
Pages (from-to)	1468-1477
Number of pages	10
Journal	IEEE Transactions on Wireless Communications
Volume	11
Issue number	4
DOIs	https://doi.org/10.1109/TWC.2012.021512.111037
Publication status	Published - 2012 Apr

Bibliographical note

Funding Information:
Manuscript received June 1, 2011; revised October 24, 2011 and January 20, 2012; accepted January 21, 2012. The associate editor coordinating the review of this paper and approving it for publication was A. Chockalingam. The authors are with the School of Electrical and Electronic Engineering, Yonsei University, Seoul, South Korea 120-749 (e-mail: {aryosigit, bslee}@csp.yonsei.ac.kr; cylee@yonsei.ac.kr). This work was supported in part by Seoul R&BD Program (WRD080951). Digital Object Identifier 10.1109/TWC.2012.021512.111037

All Science Journal Classification (ASJC) codes

Computer Science Applications
Electrical and Electronic Engineering
Applied Mathematics

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note = "Funding Information: Manuscript received June 1, 2011; revised October 24, 2011 and January 20, 2012; accepted January 21, 2012. The associate editor coordinating the review of this paper and approving it for publication was A. Chockalingam. The authors are with the School of Electrical and Electronic Engineering, Yonsei University, Seoul, South Korea 120-749 (e-mail: {aryosigit, bslee}@csp.yonsei.ac.kr; cylee@yonsei.ac.kr). This work was supported in part by Seoul R&BD Program (WRD080951). Digital Object Identifier 10.1109/TWC.2012.021512.111037",

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