Journal of South China University of Technology (Natural Science Edition) ›› 2015, Vol. 43 ›› Issue (3): 84-89.doi: 10.3969/j.issn.1000-565X.2015.03.013

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Diversity Reception Algorithm for Cooperative Communications in Ricean Fading Channels

Li Dong-wu Pei Chang-xing   

  1. State Key Laboratory of Integrated Services Networks，Xidian University，Xi’an 710071，Shaanxi，China
  • Received:2014-08-05 Revised:2014-12-29 Online:2015-03-25 Published:2015-02-10
  • Contact: 李东武(1981-)，男，博士生，主要从事通信信号处理研究． E-mail:dongwuli@163.com
  • About author:李东武(1981-)，男，博士生，主要从事通信信号处理研究．
  • Supported by:
    Supported by the National Natural Science Foundation of China (NSFC)(61072067，61372076)，the Program of Introducing Talents of Discipline to Universities(B08038) and the Special Foundation of the State Key Laboratory of Integrated Serv-ices Networks (ISN1001004)

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Abstract: Proposed in this paper is a new diversity receiving algorithm for cooperative communication systems．Firstly，space-time block coding is carried out by relay nodes to acquire a transmission signal． Secondly，spatial and frequency domain equalization is executed to the received signal by means of fast Fourier transform (FFT) at the receiver． Then，the transmitted signal is estimated by hard decisions after inverse FFT operations． In this algo-rithm，a new scheme combining decision feedback and interference cancellation is adopted to acquire cooperative diversity gain of the relay and to reduce the signal-to-noise ratio (SNＲ) loss in the process of equalization． Thus，transmission quality of cooperative communications is improved． Simulated results show that the proposed algorithm decreases the magnitude of bit error rate from original 10-2 to 10-3 when SNＲ is 12dB．

Key words: space-time block code, Fourier transform, frequency domain equalization, cooperative communica-tion, diversity gain