| 摘要 |
PURPOSE: To realize more effective orthogonalization by switching and selecting the system of orthogonalization corresponding to the number of simultaneous operator and an average receiving path per operator in an incoming channel of a CDMA system. CONSTITUTION: Concerning a digital signal received in the CDMA incoming channel, a correspondent symbol is obtained by using a spread code for each path of each operator by an inverse spread filter 20, and reception timing information is extracted and outputted. Concerning the output, an inverse correlation filter 21 performs inverse correlation processing between the inverse spread signals of all the receiving paths of all the communicators, and the synchronizing of the signal is detected by a channel estimating part 22 by using a pilot interpolating type absolute synchronizing detecting system. Concerning each communicator, an RAKE synthesizing part 23 corrects a phase for each bus and performs weighed synthesization. Also, the output signal of the filter 20 performs RAKE synthesization concerning the receiving bus of each communicator based on a transmission function from the estimating part 22 by using a channel matching inverse correlation filter 24 and afterwards, all the communicator signals are orthogonalized. |
