Journal ArticleDOI
Efficient Soft-Output Generation Method for Spatially Multiplexed MIMO Systems
TLDR
A novel detection method is proposed which can generate reliable soft-outputs while avoiding the empty vector set problem and efficiently uses the upper triangular structure in QR decomposition.Abstract:
A simple detector named QR-LRL for MIMO systems was proposed in [7] and it was shown that QR-LRL approached the hard-output ML performance. However, its soft-output performance is not capable of approaching the near ML performance. In this letter, we propose a novel detection method which can generate reliable soft-outputs while avoiding the empty vector set problem. The proposed detector efficiently uses the upper triangular structure in QR decomposition. Simulation results show that the proposed detector can approach the near soft-output ML performance as well as hard-output with feasible complexity.read more
Citations
More filters
Journal ArticleDOI
Mitigating Empty Vector Set Using Enlarged QRLRL-M Soft SM-MIMO Detector
TL;DR: The proposed detector effectively solves the EVS problem and achieves soft ML performance while keeping the computation complexity low, especially at low modulation order.
Journal ArticleDOI
Efficient List Extension Algorithm Using Multiple Detection Orders for Soft-Output MIMO Detection
Journal ArticleDOI
A low complexity soft-output detection algorithm for 2×2 multiple-input multiple-output multiband-ofdm systems using dual carrier modulation
TL;DR: The simulation results of applying the proposed algorithms to 2×2 MIMO MB-OFDM systems using DCM or MDCM show that the performance of the proposed algorithm has near soft-output maximum likelihood detection performance.
Proceedings ArticleDOI
Enlarged QR-LRL based SM-MIMO detector for efficient soft output generation
TL;DR: An enlargement of candidate vector set of QR-LRL based MIMO detector for efficient soft output generation is proposed in this article, which effectively removes EVS problem and achieves soft output ML performance while keeping the computation complexity low, especially at low modulation order.
Proceedings ArticleDOI
Efficiently using extrinsic gain for candidate vectors selection in QR-LRL based IDD MIMO receiver
TL;DR: Simulation results shows that significant performance improvement is achieved while keeping the receiver design simple, and decision is made to update candidate vector set for soft output generation.
References
More filters
Proceedings ArticleDOI
V-BLAST: an architecture for realizing very high data rates over the rich-scattering wireless channel
TL;DR: This paper describes a wireless communication architecture known as vertical BLAST (Bell Laboratories Layered Space-Time) or V-BLAST, which has been implemented in real-time in the laboratory and demonstrated spectral efficiencies of 20-40 bps/Hz in an indoor propagation environment at realistic SNRs and error rates.
Journal ArticleDOI
Simplified processing for high spectral efficiency wireless communication employing multi-element arrays
TL;DR: It is shown that robust wireless communication in high-scattering propagation environments using multi-element antenna arrays (MEAs) at both transmit and receive sites using a simplified, but highly spectrally efficient space-time communication processing method can offer no more than about 40% more capacity than the simple architecture presented.
Journal ArticleDOI
A QRD-M/Kalman filter-based detection and channel estimation algorithm for MIMO-OFDM systems
TL;DR: A V-BLAST-type combination of orthogonal frequency-division multiplexing with MIMO (MIMO-OFDM) for enhanced spectral efficiency and multiuser downlink throughput and a new joint data detection and channel estimation algorithm is proposed which combines the QRD-M algorithm and Kalman filter.
Journal ArticleDOI
Likelihood Function for QRM-MLD Suitable for Soft-Decision Turbo Decoding and Its Performance for OFCDM MIMO Multiplexing in Multipath Fading Channel
Hiroyuki Kawai,Kenichi Higuchi,Noriyuki Maeda,Mamoru Sawahashi,Takumi Ito,Yoshikazu Kakura,Akihisa Ushirokawa,Hiroyuki Seki +7 more
TL;DR: Simulation results show that by using the proposed likelihood function generation scheme for soft-decision Turbo decoding following QRM-MLD in 4-by-4 MIMO multiplexing, the required average received signal energy per bit-to-noise power spectrum density ratio is significantly reduced.
Journal ArticleDOI
Adaptive control of surviving symbol replica candidates in QRM-MLD for OFDM MIMO multiplexing
TL;DR: This paper proposes adaptive control of the number of surviving symbol replica candidates, Sm, based on the minimum accumulated branch metric of each stage in maximum-likelihood detection employing QR decomposition and the M-algorithm in orthogonal frequency-division multiplexing with multiple-input-multiple-output (MIMO)multiplexing.
Related Papers (5)
QR-LRL Signal Detection for Spatially Multiplexed MIMO Systems
A Reduced-Complexity Tree Search Detection Algorithm for MIMO Systems
Yongsang Kim,Kyungwhoon Cheun +1 more