微小卫星测控数传一体化发射机数字基带设计

Digital Baseband Design of TT&C and Data Transmission Integrated Transmitter for Micro-satellites

提出一种适用于微小卫星的测控数传一体化射频直接调制发射机方案,并基于FPGA平台设计完成发射机数字基带系统。基带系统采用测控标准调制(NRZ-DPSK-PM)和恒包络调制(GMSK、根升余弦(O)QPSK调制)方式,多种参数和滤波系数可重配置,支持不同速率的统一S波段测控和数传通信,灵活性高,可作为微小卫星测控数传系统的通用数字化模块。

Based on the proposed TT&C and data transmission integrated system,this paper puts forward a scheme of the RF carrier modulation transmitter for micro-satellites.The digital baseband system of satellite transmitter is designed based on the FPGA platform,supporting standard telemetry modulation formats(NRZ-DPSK-PM) and constant envelope modulation formats(GMSK、SRRC-(O)QPSK).With unique features of flexibility and reconfigurable parameters or filter-coefficients,the designed transmitter can transmit data of different symbol rates.The presented transmitter architecture and digital design can be used as a standard TT&C and data transmission module for micro-satellites.