可见光通信系统中的码间干扰抑制方法研究
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摘要
在激光通信系统的传输信道容易受到多径作用产生码间干扰,导致通信的误比特率较大,为了改善激光通信质量,提出一种基于频带抽样判决调制和多径扩展的激光通信码间干扰抑制方法。首先构造激光通信信道模型,分析通信系统带宽与频率、距离的关系,选择合适的载波频率及带宽,进行通信信道的时延扩展。然后采用频带抽样判决调制方法进行信道均衡设计,根据多径扩展的统计平均限定码元的速率,实现码间干扰抑制。最后进行了实际的激光通信仿真试验分析,结果表明,采用该方法进行通信系统的码间干扰抑制,降低了输出码元的误比特率,激光探测信号的多径分量能准确到达接收阵元,实现无误码通信传输。
In the transmission channel of the laser communication system,the multipath effect is easy to generate inter-code interference,resulting in a large bit error rate of communication. In order to improve the quality of laser communication,a inter-code interference inhibition methodof laser communication based on band sampling decision modulation and multipath expansion is proposed. Firstly,the laser communication channel model is constructed,and the relationship between the bandwidth of the communication system and the frequency and distance is analyzed. The appropriate carrier frequency and bandwidth are selected to reduce the delay of the communication channel. Then,the frequency band sampling decision modulation method is adopted to perform channel equalization design,and the inter-code interference suppression is implemented according to the statistical average rate of the multipath expansion. Finally,the actual laser communication simulation test analysis is carried out. The results show that the method is used to suppress the inter-code interference of the communication system,and the bit error rate of the output code is reduced.The multipath component of the laser detection signal can accurately reach the receiving array element and realize error-free communication transmission.
In the transmission channel of the laser communication system,the multipath effect is easy to generate inter-code interference,resulting in a large bit error rate of communication. In order to improve the quality of laser communication,a inter-code interference inhibition methodof laser communication based on band sampling decision modulation and multipath expansion is proposed. Firstly,the laser communication channel model is constructed,and the relationship between the bandwidth of the communication system and the frequency and distance is analyzed. The appropriate carrier frequency and bandwidth are selected to reduce the delay of the communication channel. Then,the frequency band sampling decision modulation method is adopted to perform channel equalization design,and the inter-code interference suppression is implemented according to the statistical average rate of the multipath expansion. Finally,the actual laser communication simulation test analysis is carried out. The results show that the method is used to suppress the inter-code interference of the communication system,and the bit error rate of the output code is reduced.The multipath component of the laser detection signal can accurately reach the receiving array element and realize error-free communication transmission.
引文
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[3]孙卿,杨凌辉.基于测距传感器的WMPS非接触测量方法[J].激光技术,2016,40(5):670-675.
[4]刘影,高爽,鲍志强,等.基于DBR光纤激光传感器的超声与温度双参量测量研究[J].传感技术学报,2016,29(8):1155-1159.
[5]樊荣,侯媛彬,张轶斌,等.基于专家系统随机逼近的激光传感器的温度补偿研究[J].西安科技大学学报,2015,35(4):492-497.
[6]冯冬冬,万熠,汤碧红,等.基于激光位移传感器的带锯条分齿在线检测系统研究[J].工具技术,2016,50(3):82-86.
[7]王虹,蔡喜平.基于LED阵列的可视信道室内可见光通信系统设计[J].量子电子学报,2015,32(4):507-512.
[8]董俐君,张芊,祝恩国,等.基于SGWM的230MHz无线宽带通信技术的用电信息采集系统的通信系统设计[J].电信科学,2015,31(3):130-135.
[9]杨奕,杨川,周川云.基于STM32的低功耗红外光通信系统设计[J].中国测试,2015,41(9):96-100.
[10]刘林江,王静宇.某露天矿采场无线通信系统设计[J].工矿自动化,2015,41(7):118-120.
[11]黄煜,王浩,刘文帅,等.基于CAN总线的水下通信系统设计[J].舰船科学技术,2015,37(8):146-148.
[12]黄宝旺,张习加,张净霞,等.牵引式管道清淤机器人无线通讯系统设计[J].机床与液压,2016,44(17):29-32.
[13]贾建禄,赵金宇,杨轻云,等.地基大型望远镜数字通信系统的设计[J].红外与激光工程,2015,44(2):596-600.
[14]薛晓炎,霍振龙,顾俊.矿井融合调度通信系统的设计及应用[J].工矿自动化,2016,42(8):1-5.
[15]杨绿溪,何世文,王毅,等.面向5G无线通信系统的关键技术综述[J].数据采集与处理,2015,30(3):469-485.
[16]张猛,姚列英,王英翘.基于CAN总线技术的PSM电源远程控制通信系统[J].核聚变与等离子体物理,2015,35(1):24-29.
[17]赵寰,全厚德,崔佩璋.抗跟踪干扰的多序列跳频无线通信系统[J].系统工程与电子技术,2015,37(3):671-678.