Science and Technology Production
Article
Authorship
Date
2002
Publishing House and Editing Place
IEE
Magazine
IEEE PROCEEDINGS ON COMMUNICATIONS,
vol. 149
(pp. 189-193)
IEE
Summary
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A new coded niodulation technique for signal sets designed contbining wavelet functions and M-quadrature amplitude modulation (MQAM) is presented. Trellis-coded modulation (TCM) is iinpleniented using thc ring of integers modulo-Q as the algebraic structure of the multilevel convolutional encoder. These schemes are s u i t e for adaptive time-frequency unequal error protcction. multiple-access and multiplexing, as well as being effective replaccinents for existing schcmes. Wavelet-based ring-TC...
A new coded niodulation technique for signal sets designed contbining wavelet functions and M-quadrature amplitude modulation (MQAM) is presented. Trellis-coded modulation (TCM) is iinpleniented using thc ring of integers modulo-Q as the algebraic structure of the multilevel convolutional encoder. These schemes are s u i t e for adaptive time-frequency unequal error protcction. multiple-access and multiplexing, as well as being effective replaccinents for existing schcmes. Wavelet-based ring-TCM schemes and MQAM ring-TCM schemes are first presented, and then combined to constitute a concatenated ring-TCM scheme. Thc concatenaled scheme shows a coding gain of around 8 dB over uncoded BPSK, and does not require iterative decoding.
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Key Words
WAVELETSRING TCM