双伪码直序扩频通信方法及抗干扰仿真分析OA北大核心CSCDCSTPCD
Simulation- analysis about the anti- interference ability of direct spread spectrum system with dual PN code
为改善电力线载波扩频通信系统的抗干扰性能和接收灵敏度,提出一种新颖的双伪码直序扩频通信方式.发送端把数字基带信号“0”和“1”编码成属于一优选对中的伪码序列,然后对载波进行直接扩频调制;接收端用本地产生的同一优选对伪码进行相关解调,用相关检测后的两路输出进行差分运算,从而得到解调后的数字信号,并抑制了近似共模的噪声与干扰.采用Simulink建立仿真模型,抗干扰性能测试结果表明,系统的最小输入信噪比可达-30 dB,与BPSK直序扩频系统相比抗干扰性能提高了1倍.
To improve the anti - interference ability and receiving sensitivity of power line carrier spread spectrum communication system, a new communication method of dual pseudo - noise ( PN) code sequence spread spectrum is put forward. At transmit end the digital baseband signal "0" and " 1" is encoded to pseudo - code sequences which belong to M sequence optimum pairs, then modulate the carrier. At receive end the signal despread by the same PN sequences which g…查看全部>>
孙旭飞;李家生
福州大学物理与信息工程学院,福建福州350108福州大学物理与信息工程学院,福建福州350108
信息技术与安全科学
电力线载波通信双伪码编码抗干扰扩频通信
power line carrier communication dual PN code anti - interference spread spectrum communication
《福州大学学报(自然科学版)》 2011 (6)
878-882,5
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