Title :
Precise BER Formulas for Asynchronous QPSK-Modulated DS-CDMA Systems Using Random Quaternary Spreading Over Rayleigh Channels
Author :
Liu, Xiang ; Hanzo, Lajos
Author_Institution :
Univ. of Southampton, Southampton
Abstract :
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.
Keywords :
Rayleigh channels; code division multiple access; error statistics; quadrature phase shift keying; BER analysis; Gaussian approximation; Rayleigh channels; asynchronous QPSK-modulated DS-CDMA systems; direct-sequence code-division multiple-access system; precise bit-error-ratio analysis; random quaternary spreading; Asynchronous direct-sequence code-division multiple-access (DS-CDMA); QPSK; Rayleigh; bit-error-ratio (BER); precise; quarternary spreading;
Journal_Title :
Vehicular Technology, IEEE Transactions on
DOI :
10.1109/TVT.2007.905257
