摘要
为了提高头盔式水下无线光通信系统的可靠性,设计了一种新的(3,1,1)卷积码。介绍了水下光通信模型及其对编码的要求,计算了未编码系统在水下高斯白噪声信道下的误比特率。给出了此卷积码的具体的编译码方法,推导了编码后系统误比特率计算公式。在不同系统参数、水质和传输距离的情况下,对未编码系统和编码系统分别进行了仿真。仿真结果表明:编码能够改善系统的误码性能;系统参数越大,编码改善系统性能的能力越强;水体衰减系数或传输距离越大,编码改善系统性能的能力越弱。
In order to improve the reliability of underwater helmet optical wireless communication system,a new（3,1,1）convolutional code is designed.Underwater optical communication model and its requirement for code are introduced,the bit error rate of uncoded system in underwater AWGN channel is calculated.The methods of encoding and decoding are presented;the calculated formula of bit error rate of encoded system is obtained.Both the uncoded system and the encoded system were simulated in different system parameter,water quality and transmission distance.The simulation results indicate that the bigger system parameter,the stronger ability of improving system capability by code;the bigger attenuation or transmission distance,the lower ability of improving system capability by code.
出处
《激光与红外》
CAS
CSCD
北大核心
2010年第11期1173-1177,共5页
Laser & Infrared
基金
海军工程大学自然科学基金项目(No.HGDJJ044)资助
关键词
水下光通信
卷积码设计
系统参数
衰减系数
传输距离
误比特率
underwater optical communication
convolutional code design
system parameter
attenuation quotiety
transmission distance
bit error rate
