| 孙韩,郝士琦,赵青松,王勇.大气激光通信自适应系统中LDPC的识别[J].光电子激光,2016,27(6):620~624 |
| 大气激光通信自适应系统中LDPC的识别 |
| Recognition of LDPC codes in atmospheric laser communication adaptive system |
| 投稿时间：2015-11-05 |
| DOI： |
| 中文关键词: 大气激光通信 低密度奇偶校验码(LDPC) 自适应编码调制(AMC) 识别 |
| 英文关键词:atmospheric laser communication adaptive modulation and coding (AMC) low densi ty parity check (LDPC) recognition |
| 基金项目:安徽省自然科学基金(1308085MF83,5MF120)资助项目 (电子工程学院 脉冲功率激光技术国家重点实验室,安徽 合肥 230037) |
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| 中文摘要: |
| 从大气激光通信信道 模型出发,结合大气激光通信特殊的调制方式,利用接收解调软判决序列的后验概率信息 ,导出大气激光通信 自适应系统中低密度奇偶校验码(LDPC)的识别算法公式。仿真结果表明, 当识别正确率为 0.8时, 在强湍流条件下, 算法公式比传统算法性能提高约1.2dB;在弱湍流条件下,算法公 式 比传统算法性能提高约1.5dB；并 且随着码率的降低和码长的增加,识别成功率均有提高。因此,所提算法公式能够进一步抑 制大气湍流影响,提高系统性能。 |
| 英文摘要: |
| The atmospheric laser communication channel model is established,and the recognition algorithm formula of LDPC codes in atmosphe ric laser communication channel is proposed by using the received posterior probability information in the soft decision sequence and combining with the atmospheric laser communication special modulation.The simul ation results show that when the correct recognition rate is 0.8,under the condition of strong turbulence,the performance of the proposed algorithm is improved by about 1.2dB compared with that of traditional algorithm;and under the condition of weak turbulence,the pe rformance of the proposed algorithm is improved by about 1.5dB compared with th at of traditional algorithm.Besides,when the code rate gets lower,and the code l ength gets larger,the correct recognition rate gets higher. |
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