电讯技术Issue(3)：302-306,5.DOI:10.3969/j.issn.1001-893x.2013.03.015
宽带8PSK解调高速数传接收机设计*
Design of a High Data Rate Receiver with Wideband 8PSK Demodulation
刘景元1
作者信息
- 1. 中国西南电子技术研究所，成都610036
- 折叠
摘要
Abstract
Because of the thermal noise,large Doppler and intersymbol interference in a satellite communication link,high data rate receiver(HDR)with 8-Phase Shift Keying(8PSK)demodulation is used in tracking and data relay satellite system(TDRSS). A wideband 8PSK demodulation technology is proposed. The technology employs Gardner algorithm as timing synchronizer,Maximum Likelihood(ML)Decision-Directed(DD)method as phase detector and a fractionally spaced constant modulus algorithm(FS-CMA)equalization to improve demodulation performance.A receiver based on the technology is implemented by using field programmable gate array (FPGA) and a 600 Megabits per second(Mbps)8PSK signal has been tested. According to the theoretical approach,the demodulation loss difference between tested value and theoretical value is less than 2 dB when the Bit Error Rate (BER)ranges 1 × 10-3 to 1 × 10-8 . China′s new generation TDRSS can employ the receiver as its wideband 8PSK demodulator.关键词
测控通信系统/高速数传接收机/8PSK解调/载波同步/定时恢复/恒模均衡/TDRSSKey words
TT&C system/high data rate receiver(HDR)/8PSK demodulator/carrier synchronization/timing re-covery/constant modulus equalizer/TDRSS分类
信息技术与安全科学引用本文复制引用
刘景元..宽带8PSK解调高速数传接收机设计*[J].电讯技术,2013,(3):302-306,5.
