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A simple and accurate method of probability of bit error analysis for asynchronous band-limited DS-CDMA systems

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1 Author(s)
Y. C. Yoon ; Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada

This paper considers probability of bit error (Pe) analysis in asynchronous band-limited direct-sequence code-division multiple-access (DS-CDMA) systems. It presents a simple and accurate method of Pe analysis. The proposed method can serve as an attractive alternative to the only two techniques currently available for band-limited systems: the standard Gaussian approximation (SGA) and the characteristic function method. The former is prone to inaccuracy while the latter, large computational complexity. The method generalizes the simplified improved Gaussian approximation (SIGA) derived previously for rectangular pulses. This paper also outlines a generalization of another method referred to as the improved Gaussian approximation (IGA). Numerical examples demonstrate the far greater accuracy of the generalized SIGA with respect to the SGA. The examples consider the IS-95 and square-root raised cosine (Sqrt-RC) pulses as well as uniform and nonuniform received power conditions

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IEEE Transactions on Communications  (Volume:50 ,  Issue: 4 )