Title :
Symbol-based turbo codes
Author :
Bingeman, Mark ; Khandani, Amir K.
Author_Institution :
Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada
Abstract :
We present a new turbo-coding method which parses the input block into n-bit symbols and interleaves on a symbol-by-symbol basis. This is used in conjunction with different modulation techniques to take advantage of tradeoffs between bit error rate performance, code-rate, spectral efficiency, and decoder complexity. The structure of the encoder and decoder of these codes, which We call symbol-based turbo codes, are outlined. The bit error rate performance of a few specific codes are examined. A discussion on decoder complexity is also included. Symbol-based turbo codes are good candidates for low delay transmission of speech and data in spread spectrum communication systems.
Keywords :
concatenated codes; convolutional codes; data communication; decoding; delays; error statistics; modulation; spread spectrum communication; turbo codes; voice communication; BER performance; bit error rate performance; code-rate; decoder; decoder complexity; encoder; input block parsing; low delay data transmission; low delay speech transmission; memory requirements; modulation techniques; parallel concatenation codes; recursive systematic convolutional codes; spectral efficiency; spread spectrum communication systems; symbol-based turbo codes; turbo-coding method; Bit error rate; Convolution; Convolutional codes; Decoding; Delay; Modulation coding; Multiaccess communication; Speech coding; Spread spectrum communication; Turbo codes;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/4234.798019
