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Precise BER Formulas for Asynchronous QPSK-Modulated DS-CDMA Systems Using Random Quaternary Spreading Over Rayleigh Channels

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2 Author(s)
Xiang Liu ; Univ. of Southampton, Southampton ; Lajos Hanzo

Precise bit-error-ratio (BER) analysis of an asynchronous QPSK-modulated direct-sequence code-division multiple-access system using random quaternary spreading sequences for transmission over Rayleigh channels is performed based on the characteristic-function approach. Its accuracy is verified by our numerical simulation results and also compared with those of the Gaussian approximation.

Published in:

IEEE Transactions on Vehicular Technology  (Volume:57 ,  Issue: 1 )