Achieving the Optimal Diversity-Versus-Multiplexing Tradeoff for MIMO Flat Channels With QAM Space–Time Spreading and DFE Equalization

Medles, A.; Slock, Dirk

doi:10.1109/tit.2006.885489

Cited by 18 publications

(29 citation statements)

References 18 publications

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“…DMT)가 있다는 사실이 알려져 있다 [1,5,6]. 따라서 정 해진 MIMO 환경에서 DMT에 의해 동시에 얻을 수 있는 최대 정보 전송량 (full-rate)과 다이버시티 이득(full-diversity)을 얻기 위한 효과적인 시공간 부호화 기법들이 연구되어 왔다 [7][8][9][10].…”

Section: 극복하기 위한 방법으로 시공간 부호화(Space-timeunclassified

A Dual-User Multiplexing Scheme Using Time Diversity over Frequency Nonselective SIMO Fading Channels

Choi

2013

The Journal of Korean Institute of Communications and Informati

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A dual-user multiplexing scheme for a pair of mobiles equipped with single antenna is proposed which incorporates time-delay diversity employing a rotation-based D-BLAST-like layered code. A low-dimension equivalent of the existing partial interference cancellation based group decoder is also proposed for the corresponding receiver. The BER performances of the proposed scheme and those of the ideal scheme are studied comparatively through Monte Carlo simulations.

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Section: 극복하기 위한 방법으로 시공간 부호화(Space-timeunclassified

A Dual-User Multiplexing Scheme Using Time Diversity over Frequency Nonselective SIMO Fading Channels

Choi

2013

The Journal of Korean Institute of Communications and Informati

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“…Compared with the traditional asynchronous mode, there is a pre-processing matrix module before the signal is de-multiplexed to n T transmit antennas. The purpose of the pre-processing matrix is different from the conventional pre-coding algorithm [10] [11], which obtains the maximum diversity gain. We chose a preprocessing matrix here to spread the energy of each symbol in original signal to the whole transmitted frame evenly.…”

Section: A Transmittermentioning

confidence: 99%

Pre-processing matrix based iterative detection algorithm in asynchronous V-BLAST l

Tian

Han

et al. 2012

2012 Ninth International Conference on Wireless and Optical Communications Networks (WOCN)

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In asynchronous V-BLAST over the nonselective Rayleigh fading channel, the performance of the existing linear detection algorithms improve slowly as the SNR increasing. Meanwhile, the performance of traditional iterative parallel interference cancellation (PIC) algorithm is depressed by the error propagation in the iteration process. In this paper, an iterative PIC algorithm based on pre-processing matrix is proposed: the transmitted signal is spread by pre-processing matrix in transmitter to achieve the space-time diversity gain, and low complexity iterative PIC algorithm is used in receiver, which relieves the error propagation by the pre-processing matrix. The performance improvement is verified by simulation. Under the condition of 8 transmit antennas and 4 receive antennas at the BER of 10 −3 , about 7dB gain is offered by proposed algorithm compared with traditional algorithm.

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“…are diagonal matrices and the residual ISI and noise is collected in v. Following the treatment of noise is [10], we separate the contribution of residual non-Gaussian ISI and Gaussian noise in each component of v as (2) n v (2)H n ] = 1 and the constellation itself is of nite energy, one can show that v (2) ≤ β, β > 0 and is a constant independent of ρ. The contribution of the non-Gaussian component in the noise is therefore nite.…”

Section: A Diversity Order Of Mmse-dfementioning

confidence: 99%

On full diversity equalization for precoded block transmission systems

Shenoy¹,

Ghauri²,

Slock

2009

2009 Conference Record of the Forty-Third Asilomar Conference on Signals, Systems and Computers

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Equalization techniques other than maximum likelihood equalization (MLE) that collect full diversity offered by doubly selective channels are investigated. With appropriate precoding at the transmitter, it is known the both linear equalizers (LE) and MLE collect full multiplicative multipath-Doppler diversity available in the channel. We close the gap between LE and MLE and show that decision feedback equalizers (DFE) also achieve full channel diversity in these channels. For a class of precoders proposed in [1] we propose a novel hybrid equalization scheme that also bene ts from full channel diversity at a lower complexity compared to full blown MLE. Finally, we show that the amount of redundancy introduced in these precoders is in fact an over-kill for MLE and show that redundancy proportional to channel delay spread is largely enough to allow MLE to collect full channel diversity at a complexity that is exponential in channel delay spread. Simulation results are provided to substantiate all claims made in the paper.

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Achieving the Optimal Diversity-Versus-Multiplexing Tradeoff for MIMO Flat Channels With QAM Space–Time Spreading and DFE Equalization

Cited by 18 publications

References 18 publications

A Dual-User Multiplexing Scheme Using Time Diversity over Frequency Nonselective SIMO Fading Channels

A Dual-User Multiplexing Scheme Using Time Diversity over Frequency Nonselective SIMO Fading Channels

Pre-processing matrix based iterative detection algorithm in asynchronous V-BLAST l

On full diversity equalization for precoded block transmission systems

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