Distance measurement method for double binary turbo codes and a new interleaver design for DVB-RCS

• Main Authors: Ould-Cheikh-Mouhamedou, Y., Crozier, S., Kabal, P.
• Format: Conference Proceeding
• Language: English
• Subjects: Additive white noise; Applied sciences; AWGN; Bit error rate; Broadcasting. Videocommunications. Audiovisual; Coding, codes; Digital video broadcasting; Distance measurement; Error analysis; Exact sciences and technology; Hamming weight; Information, signal and communications theory; Maximum likelihood decoding; Radiolocalization and radionavigation; Satellite telecommunications. Space telecommunications; Signal and communications theory; Signal to noise ratio; Telecommunications; Telecommunications and information theory; Television; Turbo codes
• DOI: 10.1109/GLOCOM.2004.1377934

The paper presents a computationally efficient distance measurement method for double binary turbo codes, such as these used in the digital video broadcast with return channel via satellite (DVB-RCS) standard, based on Garello's method. Distance spectra for all standardized DVB-RCS packet sizes and all standardized code rates are presented. A new interleaver design for DVB-RCS based on the dithered relative prime (DRP) interleaving approach is also presented. A minimum distance (d/sub min/) of 36 has been achieved for an unpunctured ATM packet of 424 information bits with a DRP interleaver, whereas the d/sub min/ of the standardized DVB-RCS interleaver is 31. A d/sub min/ of 38 has been achieved for an unpunctured MPEG packet of size 1504 information bits with a DRP interleaver, whereas the d/sub min/ of the standardized DVB-RCS interleaver is 33. Simulation results for code rate 1/3 show an improvement at high signal to noise ratios of at least 0.15 dB and 0.25 dB for ATM and MPEG packets, respectively.