| 摘要 |
PURPOSE:To execute a communication without any error due to an interference even the number of transmitting stations is large by calculating a correlation between a code used for an objective signal and the code used by the other station, and removing an interference signal from the other station. CONSTITUTION:A correlation calculating part 14 calculates a correlation value between a base band reception signal R outputted from a radio equipment 12 and a spreading code PNi generated from a diffusion code generating part 13 by an inner product calculation. A code correlation matrix calculating part 15 calculates the correlation value between the spreading codes, and outputs a code correlation matrix. Then, a correlation value (ri) is used as the initial approximate value of transmission data, convergence into a resolution is performed by the repeated update calculation of an approximate value (yi), and demodulated data Yi are obtained by a calculating means constituted of a storage part 16, interference amount calculating part 17, subtracter 18, and correction calculating part 19. Each step approximate value at the time of the repeated update calculation is searched by executing a function which subtracts an amount in proportion to the interference amount, and a function which corrects the approximate value so as to be close to 1 according to a preliminarily decided form. |
