Title :
Performance analysis of a SAW-based group demultiplexer for on-board processing communications satellites
Author_Institution :
Commun. Res. Center, Ottawa, Ont., Canada
fDate :
7/1/1993 12:00:00 AM
Abstract :
Derivations of the chirp Fourier transforms that can be easily implemented with surface acoustic wave (SAW) devices are described. Two configurations-the multiply-convolve-multiply (MCM) and convolve-multiply-convolve (CMC)-are treated. The derivations show that one gives the Fourier transform precisely and the other is an approximation, although a good one under most circumstances. Numerical results for the CMC are given. The results show that windowing is an effective means of reducing the sidelobe level of the output transform, but it is at the expense of widening the main lobe
Keywords :
Fourier transforms; demultiplexing equipment; satellite relay systems; signal processing; surface acoustic wave devices; SAW devices; chirp Fourier transforms; communications satellites; convolve-multiply-convolve; group demultiplexer; multiply-convolve-multiply; on-board processing; output transform; performance analysis; sidelobe level reduction; surface acoustic wave; windowing; Artificial satellites; Band pass filters; Chirp; Convolvers; Demodulation; Downlink; Fourier transforms; Mobile communication; Performance analysis; Surface acoustic wave devices;
Journal_Title :
Communications, IEEE Transactions on
