Patent ID: 7606531
Filing Date: 2009-10-20
Classification: H04B

Abstract:
1. A repeating station comprising: a first antenna group including at least one antenna element; a second antenna group that is different from the first antenna group, the second antenna group including a plurality of antenna elements; a plurality of signal generating units, each corresponding to one of said antenna elements of the second antenna group, configured to generate a directivity adjustment signal to be transmitted from each of the antenna elements of the second antenna group, a received power measuring unit configured to measure the radiated power of signals transmitted by the second antenna group and received by the first antenna group; and a weight calculating unit configured to calculate transmission weights to be multiplied by corresponding signals to be transmitted from the antenna elements of the second antenna group such that the radiated power is reduced in a direction that causes a feedback to the first antenna group, and such that the radiated power is made uniform in other directions, wherein the adjustment is performed by the weights, wherein the weight calculating unit calculates the transmission weights based on at least one of making a sum of squares of all transmission weights a fixed value, making one certain transmission weight a fixed value, and making a transmission weight of one antenna element of each of a plurality of adaptive array antennas included in the second antenna group a fixed value, and each of said plurality of antenna elements of the second antenna group is adjusted so that radiated power in the direction of the first antenna group is reduced.