A Low Complexity Algorithm for Generating Turbo Code s-Random Interleavers
Wireless Personal Communications: An International Journal
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IEEE Transactions on Communications
APCC'09 Proceedings of the 15th Asia-Pacific conference on Communications
Performance analysis of coded multi-carrier wideband systems over fading channels
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Distance spectrum analysis of third generation turbo codes
ELECTROSCIENCE'05 Proceedings of the 5th WSEAS international conference on Applied electromagnetics, wireless and optical communications
ISRN Communications and Networking
Bounding performance of LDPC codes and turbo-like codes for IEEE 802.16 broadband wireless internet
ISPA'06 Proceedings of the 2006 international conference on Frontiers of High Performance Computing and Networking
Analysis of Cubic Permutation Polynomials for Turbo Codes
Wireless Personal Communications: An International Journal
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We present a new algorithm for computing the free distance dfree of parallel and serially concatenated codes with interleavers, the parameter that dominates the code performance at very high signal-to-noise ratios (SNRs). The knowledge of dfree allows one to analytically estimate the error floor, which may prevent the use of concatenated codes in applications requiring very low error rates. The algorithm is based on the new notion of constrained subcodes, and permits the computation of large distances for large interleavers without a constraint on the input sequence weight (e.g., up to dfree=40 for a rate-1/3 turbo code with interleaver length N=3568). Applications to practical cases of relevant interest, i.e., (1) the new Consultative Committee for Space Data Systems (CCSDS) standard for deep-space telemetry and (2) the new UMTS/3GPP standard for third-generation personal communications, are presented for the first time. Other related aspects, like a study on the free distance distribution of turbo codes with small/medium interleaver length, and a comparison between parallel and serial concatenation behavior, are also discussed