Performance of optimum wavelet waveform for DS-CDMA chip waveform over QS-AWGN channel

In this paper, we search for a better chip waveform based on orthogonal wavelets for direct sequence-code division multiple access (DS-CDMA) signals to improve the probability of error (Pe) performance with minimal signal bandwidth variations. First, we derive the Pe expression over a quasi-synchronous additive white Gaussian noise channel for DS-CDMA signals, which use various pulse shaping waveforms including orthogonal wavelets as chip waveforms. It is observed that this expression depends on the chip waveform. Then, we design an optimum wavelet by using the relationship between wavelets and filter coefficients to reduce the probability of error. The DS-CDMA system using the optimum wavelet waveform results in a lower probability of error than those using the conventional chip waveforms such as raised cosine, half-sine and rectangular waveforms. Especially, the Pe of the optimum wavelet-based scheme becomes significantly better than those of the conventional chip waveforms-based schemes under the heavy loading that is the case for commercial wireless systems. When the systems work with full load (i.e. the number of users equals the processing gain), the optimum wavelet-based system results in 0.5, 2.1 and 4 dB better SNR values than those of the raised cosine, half-sine and rectangular-based systems, respectively, for a Pe value of 10-3. Copyright © 2005 John Wiley & Sons, Ltd.

Dergi Adı International Journal of Communication Systems
Dergi Cilt Bilgisi 19
Dergi Sayısı 1
Sayfalar 1 - 16
Yayın Yılı 2006
Eser Adı
[dc.title]
Performance of optimum wavelet waveform for DS-CDMA chip waveform over QS-AWGN channel
Yazar
[dc.contributor.author]
Öztürk E.
Yazar
[dc.contributor.author]
Kucur O.
Yazar
[dc.contributor.author]
Atkin G.E.
Yayın Yılı
[dc.date.issued]
2006
Yayın Türü
[dc.type]
article
Özet
[dc.description.abstract]
In this paper, we search for a better chip waveform based on orthogonal wavelets for direct sequence-code division multiple access (DS-CDMA) signals to improve the probability of error (Pe) performance with minimal signal bandwidth variations. First, we derive the Pe expression over a quasi-synchronous additive white Gaussian noise channel for DS-CDMA signals, which use various pulse shaping waveforms including orthogonal wavelets as chip waveforms. It is observed that this expression depends on the chip waveform. Then, we design an optimum wavelet by using the relationship between wavelets and filter coefficients to reduce the probability of error. The DS-CDMA system using the optimum wavelet waveform results in a lower probability of error than those using the conventional chip waveforms such as raised cosine, half-sine and rectangular waveforms. Especially, the Pe of the optimum wavelet-based scheme becomes significantly better than those of the conventional chip waveforms-based schemes under the heavy loading that is the case for commercial wireless systems. When the systems work with full load (i.e. the number of users equals the processing gain), the optimum wavelet-based system results in 0.5, 2.1 and 4 dB better SNR values than those of the raised cosine, half-sine and rectangular-based systems, respectively, for a Pe value of 10-3. Copyright © 2005 John Wiley & Sons, Ltd.
Kayıt Giriş Tarihi
[dc.date.accessioned]
2019-12-23
Açık Erişim Tarihi
[dc.date.available]
2019-12-23
Yayın Dili
[dc.language.iso]
eng
Konu Başlıkları
[dc.subject]
Chip waveform
Konu Başlıkları
[dc.subject]
DS-CDMA
Konu Başlıkları
[dc.subject]
Optimum wavelet
Konu Başlıkları
[dc.subject]
Quasi-synchronous transmission
Haklar
[dc.rights]
info:eu-repo/semantics/closedAccess
ISSN
[dc.identifier.issn]
1074-5351
İlk Sayfa Sayısı
[dc.identifier.startpage]
1
Son Sayfa Sayısı
[dc.identifier.endpage]
16
Dergi Adı
[dc.relation.journal]
International Journal of Communication Systems
Dergi Sayısı
[dc.identifier.issue]
1
Dergi Cilt Bilgisi
[dc.identifier.volume]
19
Tek Biçim Adres
[dc.identifier.uri]
https://dx.doi.org/10.1002/dac.737
Tek Biçim Adres
[dc.identifier.uri]
https://hdl.handle.net/20.500.12628/6968
Görüntülenme Sayısı ( Şehir )
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Görüntülenme Sayısı ( Zaman Dağılımı )
Görüntülenme
4
09.12.2022 tarihinden bu yana
İndirme
1
09.12.2022 tarihinden bu yana
Son Erişim Tarihi
12 Ocak 2024 14:07
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waveforms optimum systems wavelets waveform better probability DS-CDMA half-sine wavelet-based wavelet system results conventional raised expression cosine signals orthogonal significantly Copyright schemes waveforms-based scheme becomes loading Especially rectangular commercial values equals number rectangular-based respectively wireless
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