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Trellis coded modulation for transmission over fading mobile satellite channelThe combination of trellis coding and multiple phase-shift keyed (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.
Document ID
19910005210
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Simon, Marvin K. (California Inst. of Tech. Pasadena., United States)
Divasalar, Dariush (Jet Propulsion Lab. California Inst. of Tech., Pasadena., United States)
Date Acquired
August 14, 2013
Publication Date
July 3, 1990
Subject Category
Communications And Radar
Accession Number
91N14523
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-4,945,549|NASA-CASE-NPO-16904-2-CU
Patent Application
US-PATENT-APPL-SN-246032|US-PATENT-APPL-SN-929876

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