摘要
多普勒频偏一直是卫星通信中不可忽视的消极因素。针对多路混叠的卫星扩频信号下变频以后所产生的大多普勒频偏,在匹配滤波结构中采取改进的部分相关算法,在基于并行导频的信道估计中根据信道状况改变估计长度,实现了大频偏下卫星扩频信号的基带处理。
Doppler frequency offset is always the passive factor that cant be neglected in satellite communication. To solve the large Doppler frequency offset that comes from the muhipath satellite spread spectrum signal, the improved “partial correlation” algorithm is used in matched filter, at the same time the length of estimation is changed according to channel state in channel estimation based on the parallel pilot. The algorithm can accomplish the baseband processing of satellite spread spectrum signal with large Doppler frequency offset.
出处
《电讯技术》
2005年第5期180-185,共6页
Telecommunication Engineering
关键词
卫星通信
多普勒频偏
扩频通信
信道估计
基带处理算法
现场可编程门阵列
Satellite communication
Doppler frequency offset
Spread spectrum signal
Channel estimation
Baseband processing algorithm
FPGA