An Error Bound for Space-Time MMSE Multiuser Detection in Coded CDMA Systems over Fading Channels
| Autor: | Walaa Hamouda, P.J. McLane |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Multipath rayleigh fading channel
Computer science Radio receiver Data_CODINGANDINFORMATIONTHEORY Upper and lower bounds law.invention law Computer Science::Networking and Internet Architecture Fading Computer Science::Information Theory Channel code Minimum mean square error business.industry Code division multiple access ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS Multiuser detection Spread spectrum Convolutional code Modulation Bit error rate Telecommunications business Algorithm Multipath propagation Communication channel Phase-shift keying |
| Zdroj: | PIMRC |
| DOI: | 10.1109/pimrc.2005.1651600 |
| Popis: | This paper investigates the use of convolutional coding in space-time minimum mean-square-error (MMSE) multiuser-based receivers over asynchronous multipath Rayleigh fading channels. We focus on the performance gain attained through error control coding when used with binary-phase-shift-keyed modulation (BPSK) and multiuser access based on direct sequence-code-division multiple access (DS-CDMA). In our analysis, we derive an approximation for the uncoded probability of bit-error in multipath fading channels. This bit-error rate (BER) approximation is shown to be very accurate when compared to the exact performance. For a convolutionally coded system, we obtain a closed form expression for the bit-error rate upper bound. This error bound is noted to be tight as the number of quantization levels increased beyond eight |
| Databáze: | OpenAIRE |
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