Patent
Viterbi decoder bit efficient chainback memory method and decoder incorporating same
Ephraim Zehavi
- 27 Sep 1991
86
TL;DR: In this article, a Viterbi decoder is used to reconstruct from the received signal an estimate of a data bit that was coded for transmission, which is then re-encoded and provided to a trellis output mapper along with the sector value.
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Abstract: A decoder for decoding trellis coded data in which the received signal is assigned a sector value corresponding to the phase of the signal in accordance with a predetermined signal space sectorization format. A Viterbi decoder is used to reconstruct from the received signal an estimate of a data bit that was coded for transmission. This estimate is re-encoded and provided to a trellis output mapper along with the sector value. The trellis mapper in response to the input re-encoded estimate and sector value provides an estimate of an an uncoded data bit transmitted with the coded data bit.
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Citations
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R.M. Tanner
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TL;DR: In this paper, a method and apparatus for combining encoding and modulation creates signal sets from available amplitude and phase modulations by indexing ordered subspaces, which can be in either finite block or convolutional form, depending on the natural format of the desired transmission.
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Method and apparatus for resolving phase ambiguities in trellis coded modulated data
Jack K. Wolf
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TL;DR: In this paper, a codec for resolving transmission phase ambiguities in the M-ary PSK modulation of trellis coded data is proposed, which uses a differential encoder and a convolutional encoder along with multiplexed differential encoders.
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Error detection system
Gould Adam F,Arora Arvind S +1 more
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TL;DR: In this paper, an error detection system for discrete receivers was proposed, which indicates bad frames of binary information signal which contain distorted bits in excessive numbers so great as to cause a convolutional decoder to generate an incorrect, decoded signal.
76
Patent
Time-varying trellis-coded modulation formats which are robust in channels with phase variations
Joachim Hagenauer,C.-E. W. Sundberg +1 more
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TL;DR: In this paper, the authors proposed a method for producing time-varying trellis-coded phase-shift-keying modulations to facilitate carrier phase recovery when the signal has been exposed to extraneous phase variations and noise.
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