Title :
A low power FSK receiver for space applications
Author :
Grayver, E. ; Daneshrad, Babak
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
Abstract :
An FSK receiver has been designed for deep space applications which exhibits potential for ultra low power performance. The receiver is based on a novel, almost all-digital architecture. It supports a wide range of data rates and is very robust against large and fast frequency offsets due to Doppler. The architecture utilizes subsampling and 1-bit data processing together with a DFT based detection scheme to enable power consumption dramatically lower than implementations reported in literature. Novel and power efficient algorithms are derived for frequency and timing tracking. Most of the power saving techniques are applicable to a variety of applications, but some are achieved by taking advantage of the asymmetric power constraints for the receiver and the transmitter as well as the absence of adjacent channel interferers. The worst case BER performance of the receiver is just 2.5 dB below that of the optimal uncoded non-coherent FSK receiver at a BER of 10-6 and better for lower BERs
Keywords :
Doppler effect; demodulators; digital radio; discrete Fourier transforms; error statistics; frequency shift keying; radio receivers; signal detection; signal sampling; space communication links; DFT based detection; Doppler frequency offsets; adjacent channel interference; all-digital architecture; asymmetric power constraints; baseband FSK demodulator; data processing; data rates; deep space applications; frequency tracking; low power FSK receiver; optimal uncoded noncoherent FSK receiver; power efficient algorithms; space applications; subsampling; timing tracking; transmitter; ultra low power performance; worst case BER performance; Baseband; Bit error rate; Circuits; Data processing; Energy consumption; Frequency shift keying; Modulation; Robustness; Timing; Transmitters;
Conference_Titel :
Wireless Communications and Networking Confernce, 2000. WCNC. 2000 IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-6596-8
DOI :
10.1109/WCNC.2000.903942