Patent ID: 7649956
Filing Date: 2010-01-19
Classification: H04L

Abstract:
1. A modulation and demodulation system for having a senary phase shift keying modulation transmitting binary signal and phase shift keying demodulation recovering binary signal, wherein: the modulator has data conversion means for converting a binary signal of length b to a senary signal of length m; the data conversion means includes conversion means for converting a binary signal of length b−m to a ternary signal of length m; and first to sixth phases are expressed as (B, T) by using binary signal B and ternary signal T, which are (0, 0), (0, 1), (0, 2), (1, 2), (1, 1) and (1, 0) respectively, wherein the data conversion means associates the binary signal of length b−m with the ternary signal of length m to reduce a mean error of each bit of the binary signal of length b−m corresponding to all the errors of a Lee distance