Receiver design in multicarrier direct-sequence CDMA communications

Multicarrier direct-sequence code-division multiple access (MC-DS-CDMA) has emerged recently as a promising candidate for the next generation broad-band mobile networks. We consider the design of multiuser receivers for MC-DS-CDMA communications over fading channels. We present a class of spreading...

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Bibliographic Details
Published in:IEEE transactions on communications 2001-08, Vol.49 (8), p.1479-1487
Main Authors: Liu, Hui, Yin, Hujun
Format: Article
Language:English
Subjects:
Channels
Direct-sequence code-division multiple access
Exact solutions
Fading
Linear receivers
Mobile communication
Multiaccess communication
Multicarrier code division multiple access
Multiple access interference
Multiuser detection
Narrowband
Optimization
Receivers
Spread spectrum communication
Spreading
Statistical analysis
Statistics
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Summary:Multicarrier direct-sequence code-division multiple access (MC-DS-CDMA) has emerged recently as a promising candidate for the next generation broad-band mobile networks. We consider the design of multiuser receivers for MC-DS-CDMA communications over fading channels. We present a class of spreading codes that enables the simple despreading-combining receiver to achieve the performance of the optimum multiuser linear receiver. These codes are shown to be optimum for independent fading channels under a code design criterion derived. Also derived are analytic solutions of optimum spreading codes for any given channel fading statistics. Simulation results are provided to demonstrate the significant gains in performance and simplicity due to the proposed techniques.
ISSN:0090-6778
1558-0857
DOI:10.1109/26.939900