CODING FOR FAST FREQUENCY HOPPED SPREAD SPECTRUM

Authors
  1. Blake, I.F.
  2. Mark, J.W.
Corporate Authors
Waterloo Univ, Waterloo ONT (CAN) Dept of Electrical Engineering;Defence Research Establishment Ottawa, Ottawa ONT (CAN);Communications Research Centre, Ottawa ONT (CAN)
Abstract
The performance of a fast FH/MFSK antijam system is studied under both a partial-band jamming and a multitone jamming environment. An uncoded slow hopping, e.g. one hop per M-ary symbol, system exhibits poor bit error probability performance. It is shown that this drawback can be remedied by means of diversity combining or coding. A tacit assumption associated with the derivation of the bit error probability or diversity combining in a multitone jamming environment is that the receiver combiner has the ability to detect the presence of a signal, either that of the communicator or the jammer or both, in the individual tones. This is not an unreasonable assumption in the tone jamming case. A similar assumption in a partial-band jamming environment may not hold in practice. The processing gain attainable from diversity combining is quite significant and additional coding on a coding channel with diversity combining may yield additional improvement. TRUNCATED
Date of publication
15 Apr 1984
Number of Pages
48
DSTKIM No
85-02096
CANDIS No
46899
Format(s):
Hardcopy;Originator's fiche received by DSIS

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