| 摘要 |
PROBLEM TO BE SOLVED: To provide a digitally matched filter applicable to a small-sized receiver by suppressing the circuit scale for multipliers and adders or the like having been increased in proportion to a spread rate in a conventional technology. SOLUTION: This invention provides the digital matched filter where a reception base band signal selection section 2c sequentially selects an I phase signal and a Q phase signal of a received base band and a reference code I phase multiplier 3a, a reference code Q phase multiplier 3b, an I phase adder section 6a, and a Q phase adder section 6b implement a product-sum operation at a higher rate than a sampling rate of the received base band signal. |
