Title :
Optimal soft-decision decoding for a 1-bit A/D channel
Author :
Schodorf, Jeffrey B.
Author_Institution :
Lincoln Lab., MIT, Lexington, MA, USA
Abstract :
An R0 analysis for a noncoherent DPSK channel that includes a 1-bit A/D converter in the receiver front-end is presented. The analysis results are used to obtain probability of error bounds that characterize the channel when a rate R=1/2, constraint length L=7 convolutional code is used. The advantage of the R0 approach is that quantization thresholds for the soft-decision decoder can be optimized analytically, without relying on lengthy simulations. However, once the thresholds are optimally chosen, simulations are used to verify the validity of the bounds
Keywords :
channel coding; convolutional codes; decoding; differential phase shift keying; error statistics; modulation coding; quantisation (signal); 1 bit; 1-bit A/D channel; constraint length; convolutional code; noncoherent DPSK channel; optimal soft-decision decoding; probability of error bounds; quantization thresholds; receiver front-end; simulations; Band pass filters; Convolutional codes; Decoding; Demodulation; Differential quadrature phase shift keying; Laboratories; Memoryless systems; Personal communication networks; Quantization; Sampling methods;
Conference_Titel :
Communications, 1999. ICC '99. 1999 IEEE International Conference on
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-5284-X
DOI :
10.1109/ICC.1999.765485
