Power-adaptation strategies for DS/CDMA communications with successive interference cancellation in Nakagami-fading channels

Document Type

Article

Publication Date

7-1-2004

Abstract

In this paper, power adaptation for direct-sequence code-division multiple-access communications that employs a successive interference cancellation (SIC) receiver is considered. The transmission power is adapted so that, with the channel variations, the received power levels of each user have appropriate disparities. Under the constraint of average transmission power, we consider two strategies in adjusting the disparity between received signal powers. With the first strategy, the average bit-error rate (BER) for a given user averaged over channel fading statistics is minimized, while with the other, the instantaneous BER is equal for all users. We find that the performance difference between the two strategies becomes negligible as the average transmission power or line-of-sight component increases. We also discuss the impact of appropriate disparity in received power levels on the BER performance of SIC receivers. © 2004 IEEE.

Identifier

3943067119 (Scopus)

Publication Title

IEEE Transactions on Vehicular Technology

External Full Text Location

https://doi.org/10.1109/TVT.2004.830152

ISSN

00189545

First Page

1160

Last Page

1166

Issue

4

Volume

53

Grant

CCR-9903381

Fund Ref

National Science Foundation

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