Pulse or digital communications – Repeaters – Testing
Patent
1988-09-15
1990-07-31
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
375 57, 371 43, H04L 2718
Patent
active
049455494
ABSTRACT:
The combination of trellis coding and MPSK signaling with asymmetry (nonuniform spacing) to the signal set is disclosed with regard to its suitability for a fading mobile satellite communication channel. For MPSK signaling, introducing nonuniformity in the phase spacing between signal points provides an improvement in performance over that achievable with trellis codes symmetric MPSK signaling, all this without increasing the average or peak power, or changing the bandwidth constraints imposed on the system. Block interleaving may be used to reduce error and pilot tone(s) may be used for improving the error correction performance of the trellis decoder in the presence of channel fading.
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Divasalar Dariush
Simon Marvin K.
Glenn Charles E. B.
Jones Thomas H.
Manning John R.
Safourek Benedict V.
The United States of America as represented by the Administrator
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