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Space-time diversity multistage parallel interference cancellation (MPIC) for CDMA

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1 Author(s)
Ning Kong ; ThreeG Cellular Inc., San Diego, CA, USA

The paper proposes to enhance CDMA MPIC by using spatial diversity to increase the signal-to-interference ratio (SIR), resulting in a lower BER on every cancellation stage, through utilization of multiple antennas. The paper derives, for the proposed space-time MPIC (SPDMPIC), the recursive equations for both SIR and BER of each cancellation stage and their closed-form expressions as a function of space-time diversity order, the number of needed iterations, and initial SIR condition. It is found that there is an M ( of antennas) times reduction in the available time diversity order for MPIC in achieving the same BER and SIR with STDMPIC of M antennas, as expected, since basically the M antennas provide M times as many uncorrelated multi-paths. The paper also presents simulation results, which agree with the theoretical analysis

Published in:

Vehicular Technology Conference, 2000. IEEE-VTS Fall VTC 2000. 52nd  (Volume:6 )

Date of Conference:

2000