Patent ID: 7564891
Filing Date: 2009-07-21
Classification: H04B,H04J

Abstract:
1. A demodulation method in a joint detection system where a long cell-code is applied, comprising, A. making a channel estimation by a receiver for midamble code part of a signal received by every antenna unit, to obtain a channel estimation result of each antenna unit; B. calculating a first mid-matrix of the received signal of each antenna unit; wherein the first mid-matrix relates to length of the long cell-code and the channel estimation result of each antenna unit, length of the long cell-code is multiples of 16; C. based on the first mid-matrix of the received signal of each antenna unit, calculating a second mid-matrix and its associate matrix; and then based on the second mid-matrix and its associate matrix, calculating a third mid-matrix, which is a symmetric definite matrix; D. making Cholesky decomposition for the third mid-matrix, wherein the number of decomposition order relates to the length of long cell-code; E. matched filtering the received signals of all antenna units, and then making demodulation calculation based on the Cholesky decomposition result of the third mid-matrix and the matching filtered received signals.