Patent ID: 7072379
Filing Date: 2006-07-04
Classification: H04B,H04J

Abstract:
1. A transmission circuit to be used in a mobile communications system for transmitting transmission signals from a plurality of base stations with a matched transmission timing, each of said base stations being equipped with first delay means for giving a delay of a predetermined resolution to an input signal, comprising: second delay means for giving a delay to an output signal of said first delay means with a higher resolution than said first delay means, control means for computing a first delay amount which is a maximum value that does not exceed a predetermined delay amount and can be given by said predetermined resolution, instructing said first delay means said first delay amount, computing a second delay amount which is said first delay amount subtracted from said predetermined delay amount and instructing said second delay means said second delay amount, transmission timing setting means for notifying said control means of said predetermined delay amount as a transmission timing, and a transmission filter constituted by an oversampling filter being provided between said first delay means and said second delay means, wherein: said resolution of said second delay means is equal to a sampling period of an output signal of said transmission filter.