Title :
Turbo detection of coded continuous-phase modulations
Author :
Tapp, Thomas L. ; Mickelson, Rodney L.
Author_Institution :
Rockwell Collins Inc., Cedar Rapids, IA, USA
fDate :
6/21/1905 12:00:00 AM
Abstract :
Iterative (turbo) decoding of a coded, interleaved continuous-phase modulated (CPM) waveform is presented. The transmitter consists of a rate-2/3 convolutional encoder followed by an interleaver, and an 8-ary continuous phase modulator. At the receiver, soft output a posteriori probability algorithms for the convolutional code and the CPM waveform iteratively refine their probability estimates. Current simulation results show a 2.5 dB SNR improvement (at 10-5 bit-error rate) over trellis-coded CPM (TCCPM) with a 99% bandwidth efficiency of 1.24 bps/Hz. The detector has a complexity of approximately 4.5 times that of the TCCPM system
Keywords :
continuous phase modulation; convolutional codes; interleaved codes; iterative decoding; probability; turbo codes; 8-ary continuous phase modulator; CPM waveform; SNR improvement; bandwidth efficiency; continuous-phase modulation; interleaved continuous-phase modulated waveform; iterative decoding; rate-2/3 convolutional code; receiver; soft output a posteriori probability algorithms; transmitter; turbo decoding; turbo detection; Bit error rate; Concatenated codes; Convolutional codes; Detectors; Iterative decoding; Maximum likelihood detection; Modulation coding; Optical modulation; Signal mapping; Transmitters;
Conference_Titel :
Military Communications Conference Proceedings, 1999. MILCOM 1999. IEEE
Conference_Location :
Atlantic City, NJ
Print_ISBN :
0-7803-5538-5
DOI :
10.1109/MILCOM.1999.822739
