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Performance of optimum wavelet for DS‐CDMA chip waveform over multi‐path Rayleigh fading channels
Author(s) -
Öztürk Ertan,
Şahin Barış
Publication year - 2007
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.863
Subject(s) - waveform , rayleigh fading , rake receiver , code division multiple access , chip , computer science , algorithm , spread spectrum , maximal ratio combining , electronic engineering , fading , telecommunications , channel (broadcasting) , engineering , radar
In this paper, the probability of error ( P e ) expression of asynchronous direct sequence‐code division multiple access (DS‐CDMA) signals using band‐limited chip waveforms is derived over multi‐path Rayleigh fading channels. In receiver, a matched filter‐based rake receiver in conjunction with maximum ratio combiner (MRC) is considered. Numerical values for the P e are calculated for various chip waveforms including an optimum wavelet waveform. Analytical results are verified by conducting simulations. Results show that the optimum wavelet‐based scheme outperforms time‐limited raised cosine, half sine, rectangular and band‐limited square‐root raised cosine chip waveform‐based schemes in terms of the P e and the capacity defined as the number of users per Hertz for a same P e level. Copyright © 2006 John Wiley & Sons, Ltd.