scholarly journals MMSE-based iterative processing with imperfect channel and parity check in MIMO systems

2019 ◽  
Vol 13 (17) ◽  
pp. 2660-2667
Author(s):  
Fan Jiang ◽  
Cheng Li ◽  
Zijun Gong ◽  
Yan Zhang ◽  
Shudong Liu ◽  
...  
Keyword(s):  
Mimo Systems ◽  
Parity Check ◽  
Iterative Processing

scholarly journals Protograph LDPC Code Design For LS-MIMO 1-bit ADC Systems

2021 ◽  
Author(s):  
Thuy Van Nguyen ◽  
Hung Ngoc Dang
Keyword(s):  
Large Scale ◽  
Mimo Systems ◽  
Ldpc Codes ◽  
Ldpc Code ◽  
Code Design ◽  
Parity Check ◽  
Coding Gain ◽  
Research Topics ◽  
Analog To Digital ◽  
New Codes

Recently, two emerging research topics are protograph low-density parity-check (P-LDPC) and large-scale multi-input multi-output (LS-MIMO) with low-resolution analog-to-digital (ADC) converters (LS-MIMO-LOW-ADC). In these directions, many research works have proposed 1-bit ADC as a good candidate for LS-MIMO systems in order to save both transmission power and circuit energy dissipation. However, we observed that previously reported P-LDPC codes might not have good performance for LS-MIMO systems with 1-bit ADC. Hence, we perform a re-design of the P-LDPC codes for the above systems in this paper. The new codes demonstrate a good coding gain from 0:3 dB at rate 1/2 to 0:5 dB at rate 2/3 in different LS-MIMO configurations with 1-bit ADC.

scholarly journals Double-Layer Low-Density Parity-Check Codes over Multiple-Input Multiple-Output Channels

2012 ◽  
Vol 2012 ◽  
pp. 1-6
Author(s):  
Yun Mao ◽  
Ying Guo ◽  
Jun Peng ◽  
Xueqin Jiang ◽  
Moon Ho Lee
Keyword(s):  
Double Layer ◽  
Mimo Systems ◽  
Layer Structure ◽  
Mimo System ◽  
Multiple Input Multiple Output ◽  
Low Density ◽  
Parity Check ◽  
Low Density Parity Check ◽  
Multiple Input ◽  
Input Multiple Output

We introduce a double-layer code based on the combination of a low-density parity-check (LDPC) code with the multiple-input multiple-output (MIMO) system, where the decoding can be done in both inner-iteration and outer-iteration manners. The present code, called low-density MIMO code (LDMC), has a double-layer structure, that is, one layer defines subcodes that are embedded in each transmission vector and another glues these subcodes together. It supports inner iterations inside the LDPC decoder and outeriterations between detectors and decoders, simultaneously. It can also achieve the desired design rates due to the full rank of the deployed parity-check matrix. Simulations show that the LDMC performs favorably over the MIMO systems.

A Low-Profile Dual-Polarized Directional Antenna for Enhancing Channel Capacity in Indoor MIMO Systems

2010 ◽  
Vol E93-B (10) ◽  
pp. 2570-2577 ◽  
Author(s):  
Daisuke UCHIDA ◽  
Hiroyuki ARAI ◽  
Yuki INOUE ◽  
Keizo CHO
Keyword(s):  
Channel Capacity ◽  
Mimo Systems ◽  
Directional Antenna ◽  
Low Profile ◽  
Dual Polarized
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