Title :
Optimized turbo codes for delay constrained applications
Author :
Daneshgaran, Fred ; Mondin, Marina
Author_Institution :
Dept. of Electr. & Comput. Eng., California State Univ., Los Angeles, CA, USA
fDate :
1/1/2002 12:00:00 AM
Abstract :
We present the results of the optimization applied to the design of interleavers for rate-1/n parallel concatenated convolutional codes (PCCC) tailored to specific recursive systematic convolutional (RSC) constituent codes. The emphasis is on low-latency codes associated with interleavers of block length less than or equal to 160. The error floors of the optimized codes are significantly lower than those associated with the use of random interleavers. The distance spectra of the equivalent block codes resulting from trellis termination applied to PCCC are evaluated and used to obtain asymptotic bit error rate (BER) curves for the optimized codes
Keywords :
concatenated codes; convolutional codes; delays; error statistics; interleaved codes; optimisation; turbo codes; BER curves; PCCC; asymptotic bit error rate; delay constrained applications; distance spectra; error floors; error-correcting codes; interleaver block length; interleaver design; low-latency codes; optimized turbo codes; parallel concatenated convolutional codes; random interleavers; recursive systematic convolutional constituent codes; trellis termination; Bit error rate; Block codes; Concatenated codes; Constraint optimization; Convolutional codes; Delay; Design optimization; Floors; Iterative decoding; Turbo codes;
Journal_Title :
Information Theory, IEEE Transactions on
