초록 ▼

An apparatus and method for detecting signal points transmitted over a transmission line. A data transmitter encodes input data and maps this data in accordance with a Trellis Code Modulation technique. The mapped data is then modulated onto a particular carrier wave, and transmitted to a data recei

An apparatus and method for detecting signal points transmitted over a transmission line. A data transmitter encodes input data and maps this data in accordance with a Trellis Code Modulation technique. The mapped data is then modulated onto a particular carrier wave, and transmitted to a data receiver. The data receiver compensates for any detected phase shift in the carrier wave, and decodes the phase-corrected data to quickly detect parallel path information of the received data.

대표청구항 ▼

[ What is claimed is:] [1.]1. An apparatus for encoding a digital signal comprising;encoding means for convolution encoding said digital signal, said encoded digital signal including a number of bits corresponding to parallel path information;mapping means for mapping said encoded signal onto one of

[ What is claimed is:] [1.]1. An apparatus for encoding a digital signal comprising;encoding means for convolution encoding said digital signal, said encoded digital signal including a number of bits corresponding to parallel path information;mapping means for mapping said encoded signal onto one of a plurality of predetermined signal points, said signal points being divided into a plurality of subsets, said plurality of subsets comprising at least two groups, each group having at least four subsets, each subset having at least first and second signal points arranged with respect to a reference point, wherein the first and second signal points of a first subset respectively correspond to the first and second signal points of a second subset when said first subset is rotated through an angle .PHI. about said reference point, and the number of bits corresponding to the parallel path information of the first signal point of said first subset being equal to the number of bits corresponding to the parallel path information of the first signal point of said second subset and the number of bits corresponding to the parallel path information of the second signal point of said first subset being equal to the number of bits corresponding to the parallel path information of the second signal point of said second subset; andmodulating means for modulating the mapped signal.