Single Carrier Frequency Domain Equalization Space–Time Block-Spread CDMA with Multiuser Interference-Free Detection
| Autor: | Yeheskel Bar-Ness, Kodzovi Acolatse |
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| Rok vydání: | 2010 |
| Předmět: |
Carrier signal
Computer science Code division multiple access ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS Real-time computing Detector Equalization (audio) Data_CODINGANDINFORMATIONTHEORY Interference (wave propagation) Time diversity Computer Science Applications Fading distribution Channel state information Computer Science::Networking and Internet Architecture Electronic engineering Fading Electrical and Electronic Engineering Computer Science::Information Theory Communication channel |
| Zdroj: | Wireless Personal Communications. 57:481-499 |
| ISSN: | 1572-834X 0929-6212 |
| DOI: | 10.1007/s11277-010-0071-z |
| Popis: | In this paper, we study a single carrier space---time block-spread (STBS) with frequency domain equalization combined with direct-spread code division multiple access (CDMA) which we term, SCFDE-STBS-CDMA. We propose a novel SCFDE space---time scheme for CDMA that achieves multiuser-interference free reception and performs well in both slow and fast fading frequency selective channel. The orthogonality among the users is preserved at the receiver allowing a multiuser-free MUI-free detection in slow fading channel. In fast fading channel, we proposed a MMSE detector that exploits the time diversity of the fast fading channels. In the conventional counterpart scheme proposed in the literature, the length of the spreading factor affect negatively the performance of the system when the channel is fast fading while in the proposed scheme, the spreading factor is an additional degree of freedom that do not degrade the system performance. Since the maximum number of users supported depends on the spreading factor, the proposed scheme can then maintain more users than the conventional one in fast fading channels. The bit-error rate (BER) performance of the proposed scheme is analyzed and compared with the conventional approach in the literature. |
| Databáze: | OpenAIRE |
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