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Combined trellis coding with asymmetric modulations (1985)

Divsalar, D. ; Simon, M. K.

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Publication Date: 2011-08-19

Description: The use of asymmetric signal constellations combined with optimized trellis coding to improve the performance of coded systems without increasing the average or peak power, or changing the bandwidth constraints of a system is discussed. The trellis code, asymmetric signal set, and Viterbi decoder of the system model are examined. The procedures for assigning signals to state transitions of the trellis code are described; the performance of the trellis coding system is evaluated. Examples of AM, QAM, and MPSK modulations with short memory trellis codes are presented.

Keywords: COMMUNICATIONS AND RADAR

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