Title :
Turbo codes for coherent FH-SS with partial band interference
Author :
Kang, Joseph H. ; Stark, Wayne E.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
Abstract :
In this paper, turbo codes are investigated in a slow frequency-hopped spread spectrum (FH-SS) system with partial-band jamming. In addition, full-band thermal noise is present. This paper focuses on the implementation of a modified turbo decoder for this model. We consider cases of known or unknown channel state and variable number of bits per hop. Our approach is to modify the calculation of branch transition probabilities inherent in the decoder. Analytical bounds are derived and simulation is performed for coherent demodulation. The results drawn from this code are compared with a convolutional code
Keywords :
channel coding; concatenated codes; convolutional codes; data communication; decoding; demodulation; error statistics; frequency hop communication; jamming; packet radio networks; spread spectrum communication; thermal noise; FH-SS system; analytical bounds; branch transition probabilities; coherent demodulation; convolutional code; full-band thermal noise; modified turbo decoder; partial band interference; partial-band jamming; slow frequency-hopped spread spectrum system; turbo codes; Analytical models; Decoding; Demodulation; Frequency; Interference; Jamming; Performance analysis; Probability; Spread spectrum communication; Turbo codes;
Conference_Titel :
MILCOM 97 Proceedings
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-4249-6
DOI :
10.1109/MILCOM.1997.648655
