An Enhanced Soft Value Calculation for LDPC Coded Pulse-Position-Modulation

被引：3
作者：
Wu, Yongsheng [1 ]
Yang, Aiying [1 ]
Sun, Yu-nan [1 ]
Yang, Chunxue [1 ]
机构：
[1] Beijing Inst Technol, Dept Optoelect Engn, Beijing 100081, Peoples R China
来源：
IEEE COMMUNICATIONS LETTERS | 2012年 / 16卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Pulse position modulation (PPM); low density parity check (LDPC) codes; additive white Gaussian noise (AWGN); belief propagation (BP) algorithm; SPACE OPTICAL COMMUNICATIONS; PARITY-CHECK CODES; DESIGN; PPM;
D O I：
10.1109/LCOMM.2012.030912.112351
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
In this letter, a simplified soft value extraction algorithm for LDPC coded PPM modulated signals is presented. The Monte Carlo simulations are applied to get the BER curves of the system based on the simplified AWGN channel. Through rearranging the soft value by the exponential function, we get an even better performance of the system.
引用
收藏
页码：745 / 747
页数：3
相关论文
共 12 条
  • [1] [Anonymous], 1963, Low-Density Parity-Check Codes
  • [2] [Anonymous], 206002006 GB
  • [3] Free-space optical communications
    Chan, Vincent W. S.
    [J]. JOURNAL OF LIGHTWAVE TECHNOLOGY, 2006, 24 (12) : 4750 - 4762
  • [4] On the design of low-density parity-check codes within 0.0045 dB of the Shannon limit
    Chung, SY
    Forney, GD
    Richardson, TJ
    Urbanke, R
    [J]. IEEE COMMUNICATIONS LETTERS, 2001, 5 (02) : 58 - 60
  • [5] HAMKINS J, 1999, 42138 TMO
  • [6] Simplified soft value extraction for M-PPM-modulated signals in FSO systems
    Javornik, Tomaz
    Jelovcan, Igor
    Muhammad, S. Sheikh
    Kandus, Gorazd
    [J]. AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS, 2009, 63 (07) : 595 - 599
  • [7] Good error-correcting codes based on very sparse matrices
    MacKay, DJC
    [J]. IEEE TRANSACTIONS ON INFORMATION THEORY, 1999, 45 (02) : 399 - 431
  • [8] Constrained coding for the deep-space optical channel
    Moision, B
    Hamkins, J
    [J]. FREE-SPACE LASER COMMUNICATION TECHNOLOGIES XIV, 2002, 4635 : 127 - 137
  • [9] A Novel Turbo Coded Modulation Scheme for Deep Space Optical Communications
    Oh, Sangmok
    Hwang, Inho
    Banerjee, Adrish
    Lee, Jeong Woo
    [J]. IEICE TRANSACTIONS ON COMMUNICATIONS, 2010, E93B (05) : 1260 - 1263
  • [10] Richardson T., 2008, Modern coding theory
12