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Accurate BER Analysis of Asynchronous DS-CDMA Systems in Ricean Channels

Accurate BER Analysis of Asynchronous DS-CDMA Systems in Ricean Channels
Accurate BER Analysis of Asynchronous DS-CDMA Systems in Ricean Channels
The accurate Bit Error Rate (BER) calculation of an asynchronous Ricean-faded DS-CDMA system using random spreading sequences and BPSK modulation is studied in this paper. A new closed-form expression is derived for the conditional characteristic function of the cochannel interference. Furthermore, a new BER expression involving only a single integration is derived invoking the characteristic function approach and hypergeometric functions of two variables. The accuracy of our BER expression is confirmed by our simulation results for various spreading sequence lengths and various Ricean K-factors. By contrast, the Standard Gaussian Approximation (SGA) overestimates the BER of Rayleigh fading channels, when there is no Line-of-Sight (LOS) component and it under-estimates the BER, when the LOS component becomes stronger.
5 pages
Liu, X.
878efcac-76c6-4ca0-8f4a-425f1e9abdac
Hanzo, L
66e7266f-3066-4fc0-8391-e000acce71a1
Liu, X.
878efcac-76c6-4ca0-8f4a-425f1e9abdac
Hanzo, L
66e7266f-3066-4fc0-8391-e000acce71a1

Liu, X. and Hanzo, L (2006) Accurate BER Analysis of Asynchronous DS-CDMA Systems in Ricean Channels. IEEE VTC'06 (Fall), Montreal, Canada. 25 - 28 Sep 2006. 5 pages .

Record type: Conference or Workshop Item (Paper)

Abstract

The accurate Bit Error Rate (BER) calculation of an asynchronous Ricean-faded DS-CDMA system using random spreading sequences and BPSK modulation is studied in this paper. A new closed-form expression is derived for the conditional characteristic function of the cochannel interference. Furthermore, a new BER expression involving only a single integration is derived invoking the characteristic function approach and hypergeometric functions of two variables. The accuracy of our BER expression is confirmed by our simulation results for various spreading sequence lengths and various Ricean K-factors. By contrast, the Standard Gaussian Approximation (SGA) overestimates the BER of Rayleigh fading channels, when there is no Line-of-Sight (LOS) component and it under-estimates the BER, when the LOS component becomes stronger.

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Published date: 2006
Additional Information: Event Dates: 25-28 September 2006
Venue - Dates: IEEE VTC'06 (Fall), Montreal, Canada, 2006-09-25 - 2006-09-28
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 263043
URI: http://eprints.soton.ac.uk/id/eprint/263043
PURE UUID: e0e23005-561e-4190-ba7f-e72177e09613
ORCID for L Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 03 Oct 2006
Last modified: 10 Dec 2019 01:58

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Contributors

Author: X. Liu
Author: L Hanzo ORCID iD

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