Abstract: A correlator detects arriving timings of a desired wave and an interfering wave from a signal transmitted by the OFDM scheme. A reception response vector estimator estimates a first response vector for a signal arriving within a guard interval section from the head arriving wave and a second response vector for a signal arriving after the guard interval section from the head arriving wave out of the desired wave, and also a third response vector for a signal arriving within the guard interval section from the head arriving wave and a fourth response vector for a signal arriving after the guard interval section from the head arriving wave out of the interfering wave. An adaptive array block provides a weight vector based on a result of Fourier transform on the first to fourth response vectors.

Abstract: A parallel computer system includes a plurality of processing elements each comprising a network control unit. The network control unit of the processing element has ports to north, east, west and south, and row directional communication lines and column directional communication lines are connected to each port forming a taurus mesh network. Each processing element operates in two communication control modes, in a bi-directional communication mode or in a unidirectional communication mode. In the bi-directional communication mode, the network control unit permits eastward and westward transmission of data through the row directional communication lines and northward and southward transmission of data through the column directional communication lines.