Efficient Helicopter-Satellite Communication Scheme Based on Check-Hybrid LDPC Coding  

作　　者：Ping Wang Liuguo Yin Jianhua Lu 

机构地区：[1]Department of Electronic Engineering,Tsinghua University, Beijing 100084, China [2]EDA Laboratory, Research Institute of Tsinghua Universityin Shenzhen, Shenzhen 518057, China. [3]School of Information Science andTechnology, Tsinghua University, Beijing 100084, China [4]EDA Laboratory, Research Institute ofTsinghua University in Shenzhen, Shenzhen 518057, China [5]Department of Electronic Engineering, Tsinghua University, Beijing 100084, China

出　　处：《Tsinghua Science and Technology》2018年第3期323-332,共10页清华大学学报（自然科学版（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.91538203);the new strategic industries development projects of Shenzhen City(No.JCYJ20150403155812833)

摘　　要：When implementing helicopter-satellite communications, periodical interruption of the received signal is a challenging problem because the communication antenna is intermittently blocked by the rotating blades of the helicopter. The helicopter-satellite channel model and the Forward Error Control（FEC） coding countermeasure are presented in this paper. On the basis of this model, Check-Hybrid（CH） Low-Density Parity-Check（LDPC）codes are designed to mitigate the periodical blockage over the helicopter-satellite channels. The CH-LDPC code is derived by replacing part of single parity-check code constraints in a Quasi-Cyclic LDPC（QC-LDPC） code by using more powerful linear block code constraints. In particular, a method of optimizing the CH-LDPC code ensemble by searching the best matching component code among a variety of linear block codes using extrinsic information transfer charts is proposed. Simulation results show that, the CH-LDPC coding scheme designed for the helicopter-satellite channels in this paper achieves more than 25% bandwidth efficiency improvement, compared with the FEC scheme that uses QC-LDPC codes.When implementing helicopter-satellite communications, periodical interruption of the received signal is a challenging problem because the communication antenna is intermittently blocked by the rotating blades of the helicopter. The helicopter-satellite channel model and the Forward Error Control（FEC） coding countermeasure are presented in this paper. On the basis of this model, Check-Hybrid（CH） Low-Density Parity-Check（LDPC）codes are designed to mitigate the periodical blockage over the helicopter-satellite channels. The CH-LDPC code is derived by replacing part of single parity-check code constraints in a Quasi-Cyclic LDPC（QC-LDPC） code by using more powerful linear block code constraints. In particular, a method of optimizing the CH-LDPC code ensemble by searching the best matching component code among a variety of linear block codes using extrinsic information transfer charts is proposed. Simulation results show that, the CH-LDPC coding scheme designed for the helicopter-satellite channels in this paper achieves more than 25% bandwidth efficiency improvement, compared with the FEC scheme that uses QC-LDPC codes.

关 键 词：helicopter-satellite communications check-hybrid Low-Density Parity-Check（LDPC） codes Extrinsic Information Transfer（EXIT） iterative decoding 

分 类 号：TN927.2[电子电信—通信与信息系统] V275.1[电子电信—信息与通信工程]