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A cooperative diversity scheme based on quadrature signaling

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3 Author(s)
Veluppillai Mahinthan ; Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont. ; Jon W. Mark ; Xuemin Shen

A bandwidth and energy efficient cooperative diversity scheme based on quadrature signaling is proposed. The quadrature signaling is achieved by transmitting in the in-phase and quadrature components of QPSK modulation. The diversity gain and the bit error rate of the proposed cooperative diversity scheme improve with the inter-user channel quality. It is shown that the proposed scheme can achieve a diversity order of two for high inter-user signal-to-noise ratios, if the cooperating users are located within a region that permits successful cooperation. The cooperative region corresponding to a specified bit error rate is defined and derived

Published in:

IEEE Transactions on Wireless Communications  (Volume:6 ,  Issue: 1 )