Performance comparison of MF and MMSE combined iterative soft interference canceller and V-BLAST technique in MIMO/OFDM systems

Ito, T.; Xiao-dong, Wang; Kakura, Yoshikazu; Madihian, M.; Ushirokawa, Akihisa

doi:10.1109/vetecf.2003.1285065

Cited by 18 publications

(8 citation statements)

References 3 publications

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“…However, with the help of soft information from the decoder, matched-filtering (MF) based interference cancelation detection was used in the subsequent outer iterations. This combined MMSE/MF detection has also been mentioned in [20,21] as a lower complexity approximation of the SISO-MMSE detector in turbo detection and decoding receivers. Figures 4 and 5 compare the FER performance of the DTRA architecture and the sequential receiver in (2,4) and (4, 6) MIMO channels, respectively.…”

Section: Simulation Resultsmentioning

confidence: 99%

Dual-turbo receiver architecture for turbo coded MIMO-OFDM systems

Wang

Gao

et al. 2011

Sci. China Inf. Sci.

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This paper presents a novel architecture of iterative receivers with two layers of iterations for turbo coded multiple-input and multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) systems, where soft messages are passed not only between the MIMO detector and the turbo decoder, but also between the two component decoders within the turbo decoder. We first derive the factor graph representation of a turbo coded system as a basic building block for developing the iterative receivers. Then, a new soft message passing schedule over the factor graph is proposed, resulting in the proposed dual-turbo receiver architecture (DTRA). In DTRA, the MIMO detector and the turbo decoder work concurrently, and the soft messages for both layers of iterations are updated instantaneously, instead of the block-based exchange of soft messages in the conventional iterative receivers. In so doing, the processing latency can be greatly reduced while low computational complexity can be achieved. CitationWang W J, Gao X Q, Wu X F, et al. Dual-turbo receiver architecture for turbo coded MIMO-OFDM systems.

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Section: Simulation Resultsmentioning

confidence: 99%

Dual-turbo receiver architecture for turbo coded MIMO-OFDM systems

Wang

Gao

et al. 2011

Sci. China Inf. Sci.

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“…(8) to convert LLRs to soft symbol estimated n , which is needed for the interference cancellation at the next iteration.…”

Section: Denoting the Complex Symbolmentioning

confidence: 99%

“…The performance can be improved by repeating this process in an iterative manner. This is the so called iterative soft interference cancellation (ISIC) technique [8].…”

Section: Introductionmentioning

confidence: 99%

Suboptimal and Optimal MIMO-OFDM Iterative Detection Schemes

Xiao

Lin

Yin

et al. 2010

2010 IEEE Global Telecommunications Conference GLOBECOM 2010

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Abstract-A novel iterative detection scheme for MIMO-OFDM systems is proposed in this work. We show that the existing detection schemes are sub-optimum and the iterative process can be optimized by utilizing the non-circular property of the residual interference after interference cancellation. Results show that the proposed iterative scheme outperforms the conventional iterative soft interference cancellation (ISIC) and V-BLAST schemes by about 1.7 and 4.0 dB, respectively, in a 4 × 4 antennas system over exponentially distributed eleven path channels.

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“…However, the V-BLAST scheme suffers from the error propagation inherent in the decision feedback process. To tackle this problem, we can replicate the co-antenna intereference (CAI) components using the log-likelihood ratio (LLR) of the interfering signals and subtract the soft replica from the received composite-signal vector [5]. Some efficient and fast implementations of the V-BLAST algorithm have been introduced in [6], [7].…”

Section: Introductionmentioning

confidence: 99%

VBLAST Detection Algorithms Utilizing Soft Symbol Estimate and Noncircular CAI

Xiao

Yin

Cowan

et al. 2011

IEEE Trans. Signal Process.

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In this correspondence, we address the problem of error propagation inherent in the VBLAST detection process. To this end, two improved VBLAST schemes are proposed. The first one replaces hard decision with soft decision; whereas the other also utilizes soft symbol estimate, but in the meantime exploits the noncircular nature of the residual co-antenna interference (CAI) and noise, it involves refining the error criterion and nulling filter.Simulation results show that both schemes outperform their conventional counterpart, and utilization of noncircular CAI significantly alleviates the error propagation problem and improves the performance of the VBLAST detection.

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Performance comparison of MF and MMSE combined iterative soft interference canceller and V-BLAST technique in MIMO/OFDM systems

Cited by 18 publications

References 3 publications

Dual-turbo receiver architecture for turbo coded MIMO-OFDM systems

Dual-turbo receiver architecture for turbo coded MIMO-OFDM systems

Suboptimal and Optimal MIMO-OFDM Iterative Detection Schemes

VBLAST Detection Algorithms Utilizing Soft Symbol Estimate and Noncircular CAI

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