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In this paper, a new approach to construct LDMC codes is introduced. The new codes can be encoded efficiently at the transmitter side and support both of the inner-iterations and outer-iterations at the receiver side. Furthermore they can achieve the design rates and perform very well over MIMO channels.
By modeling the corresponding MIMO channel as a factor graph (FG), STBC decoder, bit interleaver and LDPC decoder can be combined together to form a larger joint factor graph (JFG). Extrinsic information transfer (EXIT) charts and bit error rate (BER) results show that the JFG enables a shuffled decoding superior to the classical serial iterative detection in performance while reducing complexity.
The Turbo receiver for MIMO channels employs a soft-input, soft-output (SISO) detector followed by a SISO channel decoder. In this letter, we describe and analyze two low complexity SISO detectors named as M-Partial-MAP and LPartial-MAP for LDPC coded MIMO systems. The latter performs slightly better than the former at the price of some computational complexities.
This paper presents a low-complexity iterative joint detection and decoding algorithm for finite geometry-low density parity check (FG-LDPC) coded multiple-input multiple-output (MIMO) systems, in which the MIMO channel detector and the FG-LDPC decoder iteratively exchange soft information. The key to the simplicity of the algorithm is the use of a bit flipping-based decoder for FG-LDPC code. An important...
We analyze MIMO systems where either Bit-Interleaved Coded Modulation (BICM) by itself or in concatenation with Space-Time Block Codes (STBCs) is used at transmission, assuming iterative Turbo-like decoding at reception. We employ Serially-Concatenated Low-Density Generator Matrix (SCLDGM) codes specifically optimized for each system configuration, and focus on two relevant STBCs: the Golden code,...
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