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中南大学学报(英文版)

Journal of Central South University

Vol. 21    No. 5    May 2014

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Enhanced quadrature signaling-based cooperative transmission with full rate and full diversity
LU Tao(芦涛), GE Jian-hua(葛建华), YANG Ye(杨烨), GAO Yang(高洋)

State Key Laboratory of Integrated Services Networks, Xidian University, Xi’an 710071, China

Abstract:Quadrature signaling-based cooperative transmission is an efficient and simple scheme to obtain spatial diversity. However, this scheme causes date rate loss compared with direct transmission. In this work, our focus is on recovering from the data rate loss while simultaneously achieving spatial diversity. Particularly, an enhanced quadrature signaling-based cooperative scheme was designed, which can realize full-rate transmission by using the signal space diversity (SSD) technique. Then, accurate bit error rate (BER) expression for the full-rate scheme was derived over independent and non-identically distributed (INID) Rayleigh fading channels. Specifically, a closed-form BER expression is obtained, which is quite tight over the whole SNR range, and thus allows for rapid and efficient evaluation of system performance under various channel conditions. Moreover, an asymptotic approximation of the BER was derived to show that the full-rate scheme can achieve full diversity. Simulation results verify the tightness of the analysis and show that the full-rate scheme significantly outperforms the traditional quadrature signaling-based scheme by about 2 dB with the same complexity order.

 

Key words: bit error rate; cooperative diversity; quadrature amplitude modulation; signal space diversity

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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