Iterative detection for space-time coded synchronous CDMA communication systems

Jayaweera, Sudharman K.; MacMullan, S.J.; Poor, H. Vincent; Flaig, A.

doi:10.1109/vtc.2002.1002976

Cited by 9 publications

(2 citation statements)

References 15 publications

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“…Generalization of MUD to space-time coding has been studied e.g. in [8,9]. However, these schemes suffer from high computational complexity and require the receiver to know or estimate all spreading codes.…”

Section: Introductionmentioning

confidence: 99%

Decision feedback equalization and transmit diversity for wideband CDMA

Mohammad

Taghavi

Khalaj

2004

2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577)

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A single-user receiver structure for space-time coded CDMA downlink is studied in a multiuser frequency selective channel. The proposed scheme is a two dimensional Decision Feedback Equalizer (2D-DFE), whose filters are optimized based on the MMSE criterion to cancel noise, ISI, and MUI with a reasonable complexity. By modeling the spreading codes of the interfering users as random sequences, system performance has been evaluated using the Gaussian approximation. Two models for the desired user's spreading sequence have been considered and compared. Our numerical results show that in both cases the 2D-DFE exhibits significant performance improvement and capacity enhancement over the standard space-time coded RAKE structure, especially in interference-limited conditions.

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Section: Introductionmentioning

confidence: 99%

Decision feedback equalization and transmit diversity for wideband CDMA

Mohammad

Taghavi

Khalaj

2004

2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577)

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show abstract

“…Most space-time coding schemes are based on the assumption of a frequency flat fading channel. Under these conditions, the introduction of space-time coding into multiuser systems seems to provide significant performance gains just as they do in single-user channels [9,10,11,12,13,14].…”

Section: Introductionmentioning

confidence: 99%

Blind Adaptive Decorrelating RAKE (DRAKE) Downlink Receiver for Space-Time Block Coded Multipath CDMA

Jayaweera

Poor

2003

EURASIP J. Adv. Signal Process.

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A downlink receiver is proposed for space-time block coded CDMA systems operating in multipath channels. By combining the powerful RAKE receiver concept for a frequency selective channel with space-time decoding, it is shown that the performance of mobile receivers operating in the presence of channel fading can be improved significantly. The proposed receiver consists of a bank of decorrelating filters designed to suppress the multiple access interference embedded in the received signal before the space-time decoding. The new receiver performs the space-time decoding along each resolvable multipath component and then the outputs are diversity combined to obtain the final decision statistic. The proposed receiver relies on a key constraint imposed on the output of each filter in the bank of decorrelating filters in order to maintain the space-time block code structure embedded in the signal. The proposed receiver can easily be adapted blindly, requiring only the desired userÃ¢Â€Â²s signature sequence, which is also attractive in the context of wireless mobile communications. Simulation results are provided to confirm the effectiveness of the proposed receiver in multipath CDMA systems

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An iterative MMSE-decision feedback multiuser detector for space-time coded multicarrier CDMA system

Kafle

Sesay

McRory

Canadian Conference on Electrical and Computer Engineering 2004 (IEEE Cat. No.04CH37513)

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Iterative detection for space-time coded synchronous CDMA communication systems

Cited by 9 publications

References 15 publications

Decision feedback equalization and transmit diversity for wideband CDMA

Decision feedback equalization and transmit diversity for wideband CDMA

Blind Adaptive Decorrelating RAKE (DRAKE) Downlink Receiver for Space-Time Block Coded Multipath CDMA

An iterative MMSE-decision feedback multiuser detector for space-time coded multicarrier CDMA system

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