MULTIPLE-SYMBOL DIFFERENTIAL DETECTION OF DPSK WITH FREQUENCY OFFSET

Authors
  1. Turgeon, M.
Corporate Authors
Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
A ground terminal (GT) simulator for an extremely high frequency (EHF) satellite communications (SATCOM) system is being developed as part of the EHF SATCOM project at the Defence Research Establishment Ottawa (DREO). The GT demodulator uses multiple-symbol differential detection of DPSK (MSDPSK), a demodulation technique which estimates the phase reference of a DPSK modulated, burst signal over a sequence of N symbols. The bit error rate (BER) performance is investigated and the simulation results are presented. The BER performance of MSDPSK is shown to approach that of coherently detected DPSK (DEPSK) for large N. The effects of frequency offset are also investigated. For a specific amount of frequency uncertainty, there is an optimum sequence size N that yields the best BER performance. For example, given a burst size of13 bits and a frequency offset up to 1/50 of the bit rate, the optimum sequence size is in the range of 3 to 5 bits.
Report Number
DREO-TN-92-5 — Technical Note
Date of publication
15 Dec 1991
Number of Pages
49
DSTKIM No
93-00082
CANDIS No
127335
Format(s):
Hardcopy;Originator's fiche received by DSIS

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