Title :
Punctured turbo-codes for BPSK/QPSK channels
Author :
Acikel, O.F. ; Ryan, William E.
Author_Institution :
Dept. of Electr. & Comput. Eng., New Mexico State Univ., Las Cruces, NM, USA
fDate :
9/1/1999 12:00:00 AM
Abstract :
We discuss a procedure for designing high-rate turbo-codes via puncturing, with applications to BPSK/QPSK channels. Rates in the form k/(k+1), 2⩽k⩽16, are considered for constituent encoders with memory sizes m=3 and 4. The algorithm includes the selection of constituent encoder generator polynomials, puncture patterns, and interleavers with the goal of maximizing the minimum codeword weight for weight-two and weight-three inputs. The performance of the proposed codes are found via computer simulation and are observed in each case to be less than 0.9 dB (m=3), and 0.75 dB (m=4), from their respective channel capacity limits at a bit-error rate of 10-5. We consider two applications of punctured turbo-codes
Keywords :
AWGN channels; binary codes; channel capacity; polynomials; quadrature phase shift keying; satellite links; turbo codes; AWGN channel; BER; BPSK/QPSK channels; binary turbo-codes; bit-error rate; channel capacity; computer simulation; encoders; generator polynomials; high-rate turbo-codes; interleavers; memory sizes; minimum codeword weight; performance; puncture patterns; punctured turbo-codes; satellite link; weight-three input; weight-two input; Bandwidth; Binary phase shift keying; Bit error rate; Channel capacity; Computer simulation; Convolutional codes; Iterative decoding; Phase shift keying; Quadrature phase shift keying; Turbo codes;
Journal_Title :
Communications, IEEE Transactions on
