Efficient Soft-Input Soft-Output Detection of Dual-Layer MIMO Systems
Ahmad Gomaa,Louay Jalloul +1 more
TLDR
It is shown that the computational complexity of the exact max-log maximum a posteriori (max-log-MAP) solution grows linearly with the constellation size and is also less than that of the best known methods of Turbo-LORD that only provide approximate solutions.Abstract:
A dual-layer multiple-input multiple-output (MIMO) system with multi-level modulation is considered. A computationally efficient soft-input soft-output receiver based on the exact max-log maximum a posteriori (max-log-MAP) principle is presented in the context of iterative detection and decoding. We show that the computational complexity of our exact max-log-MAP solution grows linearly with the constellation size and is also less than that of the best known methods of Turbo-LORD that only provide approximate solutions. Using decoder feedback to change the decision thresholds of the constellation symbols, we show that the exhaustive search operation boils down to a simple slicing operation.read more
Citations
More filters
Journal ArticleDOI
Optimized Configurable Architectures for Scalable Soft-Input Soft-Output MIMO Detectors With 256-QAM
TL;DR: An optimized low-complexity and high-throughput MIMO signal detector core for detecting spatially multiplexed data streams and shows that distances can be easily computed using elementary addition operations, while optimal slicing is done via efficient comparisons with soft decision boundaries, resulting in a simple feed-forward pipelined architecture.
Journal ArticleDOI
High Order Multi-User MIMO Subspace Detection
TL;DR: Simulations demonstrate that depending on the channel condition, one of the proposed schemes can achieve near interference-aware performance with a minimum complexity overhead.
Proceedings ArticleDOI
Low-complexity MIMO detector with 1024-QAM
TL;DR: This paper proposes several approaches that outperform LC-LORD at a lower complexity, based on improving the location of a reduced region of search within a 1024-QAM constellation, as well as optimizing the bit log likelihood ratio (LLR) approximation.
Journal ArticleDOI
Efficient Soft-Input Soft-Output MIMO Chase Detectors for arbitrary number of streams
Ahmad Gomaa,Louay Jalloul +1 more
TL;DR: In this paper, two variants of the SISO detector are developed, referred to as SISO B-Chase and SISO L-chase, and the performance of these detectors significantly improves with just a few number of IDD iterations.
Journal ArticleDOI
Efficient Soft-Input Soft-Output MIMO Chase Detectors for Arbitrary Number of Streams
Ahmad Gomaa,Louay Jalloul +1 more
TL;DR: Novel soft-input soft-output (SISO) multiple-input multiple- output (MIMO) detectors based on the Chase detection principle in the context of iterative detection and decoding (IDD) are presented.
References
More filters
Journal ArticleDOI
Achieving near-capacity on a multiple-antenna channel
TL;DR: This work provides a simple method to iteratively detect and decode any linear space-time mapping combined with any channel code that can be decoded using so-called "soft" inputs and outputs and shows that excellent performance at very high data rates can be attained with either.
Journal ArticleDOI
Minimum mean squared error equalization using a priori information
TL;DR: This work explores a number of low-complexity soft-input/soft-output (SISO) equalization algorithms based on the minimum mean square error (MMSE) criterion and shows that for the turbo equalization application, the MMSE-based SISO equalizers perform well compared with a MAP equalizer while providing a tremendous complexity reduction.
Journal ArticleDOI
Turbo-BLAST for wireless communications: theory and experiments
Mathini Sellathurai,Simon Haykin +1 more
TL;DR: The net result is a new transceiver that is not only computationally efficient compared with the optimal maximum likelihood decoder, but it also yields a probability of error performance that is orders of magnitude smaller than traditional BLAST schemes for the same operating conditions.
Journal ArticleDOI
Iterative decoding for MIMO channels via modified sphere decoding
TL;DR: A modification of the Fincke-Pohst (sphere decoding) algorithm to estimate the maximum a posteriori probability of the received symbol sequence is proposed and, over a wide range of rates and signal-to-noise ratios, has polynomial-time complexity.
Journal ArticleDOI
Improved linear soft-input soft-output detection via soft feedback successive interference cancellation
TL;DR: Simulations performed on a space-time bit-interleaved coded modulation (STBICM) architecture over quasi-static MIMO fading channels demonstrate that the SIOF V-BLast detector provides performance gains over previous turbo-BLAST detectors, most notably when more transmit antennas are used.