A SIMULATION OF FREQUENCY DEHOPPED BINARY AND 4-ARY NCFSK SIGNALS

Authors
  1. Keightley, R.J.
Corporate Authors
Communications Research Centre, Ottawa ONT (CAN)
MONITOR AGENCY
Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
The report describes the simulation of frequency dehopped binary and 4-ary non-coherent frequency shift keyed signalling (NCFSK) over a Gaussian channel. Orthogonal FSK signals and a hopping rate of one hop per FSK symbol were simulated. Simulations were performed with and without forward error correction. Rate 1/3, constraint length 8 and rate 1/2, constraint length 7 convolutional codes with hard decision Viterbi decoding were used. A family of curves showing the probability of bit error rate of 1 in E sub b/N sub o was produced. Coding gains of about 2 dB at an error rate of 1 in E5 were observed for binary NCFSK and a coding gain of less than 1.0 dB was observed at the same error rate for 4-ary NCFSK. Some extensions of the work are suggested for future study.
Report Number
TN-722 —
Date of publication
15 Apr 1984
Number of Pages
43
DSTKIM No
85-03101
CANDIS No
47889
Format(s):
Hardcopy;Originator's fiche received by DSIS

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