Title :
On punctured trellis-coded modulation
Author :
Kim, Jaehyeong ; Pottie, Gregory J.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
fDate :
3/1/1996 12:00:00 AM
Abstract :
Punctured convolutional codes result in some savings in the complexity of Viterbi decoders, compared to other codes of the same rate. However, in general use of the punctured structure in the decoder results in a performance loss for trellis codes, due to difficulties in assigning metrics, We provide constructions for punctured rate-2/3 codes based on decomposition of the metric into orthogonal components. These show no loss in performance for trellis coded QAM and PSK. We also provide 180° and 90° rotationally invariant punctured TCM for QAM signaling
Keywords :
Viterbi decoding; convolutional codes; phase shift keying; quadrature amplitude modulation; trellis coded modulation; PSK; QAM; Viterbi decoders; convolutional codes; metric decomposition; orthogonal components; punctured rate-2/3 codes; rotationally invariant signalling; trellis codes; trellis-coded modulation; Convolutional codes; Decoding; Modulation coding; Performance loss; Quadrature amplitude modulation; Sampling methods; Upper bound; Viterbi algorithm; Wavelet analysis; Wavelet transforms;
Journal_Title :
Information Theory, IEEE Transactions on
