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Performance analysis of asynchronous direct sequence code division multiple access for general chip waveforms over multi-path Rayleigh fading channels

Performance analysis of asynchronous direct sequence code division multiple access for general chip waveforms over multi-path Rayleigh fading channels

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The probability of error (Pe) performance of asynchronous direct sequence code division multiple access (DS-CDMA) signals over multi-path Rayleigh fading channels for general (i.e. time-limited and band-limited) chip waveforms is investigated. The numerical values of the Pe are calculated for DS-CDMA signals using conventional time-limited chip waveforms and a band-limited square root raised cosine (SRRC) chip waveform. Analytical calculations are verified by conducting simulations. In terms of the Pe, the SRRC-based system results in a worse performance value than those of the time-limited chip waveform-based systems. However, due to its compact bandwidth, the SRRC-based system provides the highest capacity defined as the number of users per Hertz for a same Pe performance level.

Inspec keywords: code division multiple access; error statistics; multipath channels; waveform analysis; Rayleigh channels; spread spectrum communication

Other keywords: direct sequence code division multiple access; error probability; performance analysis; chip waveforms; multipath Rayleigh fading channel; asynchronous DS-CDMA

Subjects: Other topics in statistics; Multiple access communication; Mathematical analysis; Radio links and equipment

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