| 摘要 |
PROBLEM TO BE SOLVED: To realize mobile communication with high quality at a lower arithmetic cost. SOLUTION: A code 10 indicates a down-sampling section having a received signal model extract means. The down-sampling section 10 extracts a first received signal model z<SB>1n</SB>for computing the weight including phase information of a received signal X<SB>1n</SB>from the received signal X<SB>1n</SB>. An output coefficient calculation section 50 (output coefficient calculation means) calculates an output coefficient u<SB>n</SB>(weight coefficient) on the basis of the first received signal model z<SB>1n</SB>. Although a conventional method selects a value of twice the signal transmission rate or over to be a lower limit of a sampling rate, since it is required and sufficient for the arithmetic processing performance of the u<SB>n</SB>to have only to be able to track a change in a radio wave environment attendant on movement of a reception point, separating a portion of calculating the value u<SB>n</SB>from a portion of directly applying arithmetic processing to the received signal X<SB>1n</SB>(output wave arithmetic processing section 40) can remarkably lower the sample rate of the received signal with respect to the calculation processing of the u<SB>n</SB>. COPYRIGHT: (C)2004,JPO
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