| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce degradation of reception characteristics due to multipaths having delays exceeding a guard interval length, at a receiver of a MIMO (Multiple Input Multiple Output)-OFDM (Orthogonal Frequency Division Multiplexing) system.SOLUTION: A receiver 1 includes: a time-domain spatial filter part 40 for separating a reception series by a synthesizing process of an equivalent baseband signal of a reception signal by using a weighting coefficient in time-domain, and outputting the synthesized signal; a frequency domain equalization part 50 for converting the synthesized signal to a frequency-domain signal, equalizing the frequency domain signal using an equalizing coefficient, re-converting the equalized signal to a time-domain signal, and outputting the time-domain signal; a frequency-domain spatial filter 60 for estimating a channel response matrix of a frequency-domain equalized signal which is converted from the time-domain signal, and outputting an estimated transmission signal which is a transmission signal estimated by using the channel response matrix; and an adaptive control part 90 for calculating the weighting coefficient and the equalizing coefficient.</p> |
