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首页> 外文期刊>Journal of spacecraft technology >A Novel Software Defined BPSK Receiver with Self Acquisition Capability for High Dynamics Space Applications
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A Novel Software Defined BPSK Receiver with Self Acquisition Capability for High Dynamics Space Applications

机译：A Novel Software Defined BPSK Receiver with Self Acquisition Capability for High Dynamics Space Applications

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摘要

Telecommand (TC) receivers employed for satellite communications need to cater to high doppler conditions, higher receiver sensitivity, low on-board power consumption with the choice of an efficient modulation scheme. Typically, phase shift keying (PSK) modulation is recommended for medium to high data rate earth-to-space communication links. One of the space missions had a requirement to support 8 kbps TC data for the first time and has been accomplished by designing an S-Band TC receiver with PCM/PSK modulation.A novel software defined radio concept, based on the Fast Fourier Transform (FFT) technique and computationally efficient algorithms for IF processing, has been built-in for the first time to implement a space-based S-band BPSK receiver supporting 8 kbps data rate. Salient features of the proposed design include modular super-heterodyne radio frequency (RF) front end, fractional synthesizer based local oscillator (LO) signal generation, digital intermediate frequency (IF) sampling architecture, radiation tolerant FPGA based IF processing to cater to high doppler tracking capability of the order of ±150 kHz, computationally efficient algorithms for data demodulation and bit-synchronization. This paper presents the architecture and performance of the proposed S-band BPSK Digital TC receiver realized for space missions.

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