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On the Performance of Band-Limited Asynchronous DS-CDMA over Nakagami-m Channels

On the Performance of Band-Limited Asynchronous DS-CDMA over Nakagami-m Channels
On the Performance of Band-Limited Asynchronous DS-CDMA over Nakagami-m Channels
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 chipwaveforms. 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 oversampled 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. Index Terms—Code-division multiple-access, chip waveform, Gaussian approximation, Nakagami, band-limited, normalized bandwidth.
1586-1593
Wei, H.
c99f7f91-cfea-4292-8f88-6b184ff81446
Yang, L-L.
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Wei, H.
c99f7f91-cfea-4292-8f88-6b184ff81446
Yang, L-L.
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1

Wei, H., Yang, L-L. and Hanzo, L. (2006) On the Performance of Band-Limited Asynchronous DS-CDMA over Nakagami-m Channels. IEEE Transactions on Wireless Communications, 5 (7), 1586-1593.

Record type: Article

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 chipwaveforms. 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 oversampled 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. Index Terms—Code-division multiple-access, chip waveform, Gaussian approximation, Nakagami, band-limited, normalized bandwidth.

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Published date: July 2006
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 262974
URI: http://eprints.soton.ac.uk/id/eprint/262974
PURE UUID: 6abacb45-19fe-477e-8ba0-a16cbef0289a
ORCID for L-L. Yang: ORCID iD orcid.org/0000-0002-2032-9327
ORCID for L. Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

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Date deposited: 18 Sep 2006
Last modified: 03 Dec 2019 02:06

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