Title :
An iterative approach to joint source-channel decoding of combined TCQ/CPM
Author :
Lin, Zihuai ; Aulin, Tor
Author_Institution :
Dept. of Comput. Eng., Chalmers Univ. of Technol., Goteborg, Sweden
Abstract :
An iterative soft decoding approach to joint source and channel coding using combined trellis coded quantization (TCQ) and continuous phase modulation (CPM) is proposed. This iterative procedure exploits the structure of the TCQ encoder and the continuous phase modulator. It is observed that the combined TCQ/CPM systems are both power and bandwidth efficient compared with the combined TCQ/TCM system. Based on extrinsic information density evolution, a convergence analysis of combined TCQ/CPM with iterative decoding is presented. The conventional convergence analysis techniques based on the uniform error property of geometrically uniform codes has been modified and generalized to the codes with a non-uniform error property.
Keywords :
combined source-channel coding; continuous phase modulation; convergence; geometric codes; iterative decoding; quantisation (signal); trellis coded modulation; combined TCQ-CPM; continuous phase modulation; convergence analysis technique; geometrically uniform code; iterative soft decoding approach; joint source-channel decoding; trellis coded quantization; Additive white noise; Bandwidth; Channel coding; Continuous phase modulation; Convergence; Iterative decoding; Iterative methods; Modulation coding; Nonlinear distortion; Quantization;
Conference_Titel :
Communications, 2005. ICC 2005. 2005 IEEE International Conference on
Print_ISBN :
0-7803-8938-7
DOI :
10.1109/ICC.2005.1494530
