Title :
On the performance of band-limited asynchronous DS-CDMA over nakagami-m channels
Author :
Wei, Hua ; Yang, Lie-Liang ; Hanzo, Lajos
Author_Institution :
Sch. of Electron. & Comput. Sci., Southampton Univ.
fDate :
7/1/2006 12:00:00 AM
Abstract :
In this paper we investigated the BER performance of DS-CDMA using various chip-waveforms, which include three time-limited chip-waveforms and two band-limited chip-waveforms. Closed-form formulae were derived for evaluating the achievable bit-error rate performance with the aid of the standard Gaussian approximation, when communicating over a Nakagami-m channel. The time-limited waveforms impose a low implementational complexity, since they maybe over sampled and read from a look-up table. However, they are outperformed by the frequency-domain raised-cosine waveform as well as the optimum waveform specifically designed by Cho and Lehnert for achieving the lowest possible bit error rate
Keywords :
Nakagami channels; bandlimited communication; code division multiple access; error statistics; spread spectrum communication; BER performance; Gaussian approximation; Nakagami-m channels; band-limited asynchronous DS-CDMA; bit-error rate; direct sequence code division multiple access; three time-limited chip-waveforms; two band-limited chip-waveforms; Bandwidth; Bit error rate; Context; Dispersion; Fading; Gaussian approximation; Multiaccess communication; Multiple access interference; Shape; Signal design;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2006.1673065
