Title :
A TMS320C53 based enhanced forward error correction scheme for US digital cellular radio
Author :
Chishtie, Mansoor A.
Author_Institution :
DSP Applications, Texas Instruments Inc., Houston, TX, USA
Abstract :
An enhanced forward error correction scheme is presented that complies with the USA digital cellular (USDC) standard. The proposed scheme use a generalized Viterbi algorithm (GVA) based on the work of N. Seshadri and C.-E.W. Sundberg (see Proc. GLOBECOMM 89, p43.3.1-4, 1989) that produces an ordered list of N global best estimates of the transmitted sequence. An algorithm is described that uses GVA to enhance performance of the USDC voice channel decoder. The algorithm is implemented on a fixed-point digital signal processor, TMS320C53. It is shown that the TMS320C53 implementation of the algorithm does not require significant increase in computational overhead when compared to a standard Viterbi algorithm
Keywords :
cellular radio; decoding; error correction; N global best estimates; TMS320C53 implementation; USA digital cellular standard; computational overhead; enhanced forward error correction scheme; fixed-point digital signal processor; generalized Viterbi algorithm; ordered list; transmitted sequence; voice channel decoder; Convolution; Convolutional codes; Decoding; Digital signal processing; Digital signal processors; Forward error correction; Land mobile radio cellular systems; Radio link; Signal processing algorithms; Viterbi algorithm;
Conference_Titel :
Wireless Communications, 1992. Conference Proceedings., 1992 IEEE International Conference on Selected Topics in
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-0723-2
DOI :
10.1109/ICWC.1992.200776
