THE STUDY OF SPACE COMMUNICATIONS SPREAD SPECTRUM SYSTEMS

Authors
  1. McLane, P.
  2. Traynor, P.
  3. Simmons, S.J.
  4. Lam, Y.M.
  5. Wittke, P.H.
Corporate Authors
Queen's Univ, Kingston ONT (CAN) Dept of Electrical Engineering;Communications Research Centre, Ottawa ONT (CAN)
Abstract
We present some aspects of the performance analysis of a SAW-based receiver that can jointly demodulate group FSK and DPSK signals. The DPSK demodulation is based on Fourier transforming a hop length DPSK signal which has synchronization advantages over a symbol based transform based demodulator in EHF Satcom systems. Since group based FSK demodulation by SAW devices in relatively well known the report concentrates on the DPSK section of the joint demodulation. We show that rectangular windows are best for the DPSK demodulator considered. However, adjacent channel interference and spectral domain truncation are two sources of significant performance degradation in the joint demodulation receiver. It is believed that this performance loss can be overcome by using bandwidth efficient modulations like CPFSK.
Report Number
QU,K-EE-89-1 — Contractor Report; Includes Parts I, II and III Interim Reports
Date of publication
15 Mar 1989
Number of Pages
94
DSTKIM No
89-03658
CANDIS No
61554
Format(s):
Hardcopy;Originator's fiche received by DSIS

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