Proposal of cooperative transmission for the uplink of TDD-CDMA systems

Authors:
Ho Van Khuong;Hyung-Yun Kong
Affiliations:
7-522 Department of Electrical Engineering, University of Ulsan, Ulsan, Korea;7-522 Department of Electrical Engineering, University of Ulsan, Ulsan, Korea
Venue:
PCM'05 Proceedings of the 6th Pacific-Rim conference on Advances in Multimedia Information Processing - Volume Part II
Year:
2005

Citing 4
Cited 0

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Abstract

This paper studies a novel cooperative transmission scheme that allows single-antenna users to benefit from spatial diversity for the uplink of TDD-CDMA systems. In such systems, the chip-synchronous transmission is attainable and thus, using orthogonal spreading codes can completely eliminate MAI in flat Rayleigh fading channels plus AWGN and make the user-cooperation possible. The proposed cooperation scheme is applicable to any constant-envelope modulation and achieves the fullest diversity order, the low implementation complexity and the full data rate. The closed-form outage probability expression was also derived to verify its validity. A variety of numerical results reveal the cooperation significantly outperforms non-cooperative counterpart under the same transmit power constraint.