Mitsuru Uesugi

TL;DR: In this article, the authors considered an optimal reception characteristic of a communication apparatus with variable directivity and showed that this characteristic positively accommodates a communication with a terminal in poor reception conditions, which makes it possible to reduce power of this terminal and reduce interference, thereby increasing the subscriber capacity in the system.

TL;DR: In this article, the subtractor of the reception system calculates the channel quality using an optimal guard interval length detection signal inserted into one carrier by the transmission system, then the optimal guard intervals length detector calculates the minimum guard intervals necessary to eliminate delayed signals using this calculated channel quality, inserts the control signal indicating this guard interval lengths into one channel and the reception systems sets the guard intervallength using this control signal.

TL;DR: In this article, a scheduler 104 performs scheduling which decides the order of data transmission according to the number of receiving antennas of each mobile station device to enable all mobile station devices to properly receive data sent to each of the devices when the data are sent to different mobile devices from a plurality of transmission antennas.

TL;DR: In this article, a slot quality detector detects a reception level, and power controller inversely corresponding to reception quality outputs power control information indicative of increasing transmission power in the case where the detected reception level is higher than a threshold value and of decreasing the transmission power when the detected quality is lower than the threshold value.

TL;DR: In this paper, the interference signal cancellation system of the invention has: usual CDMA demodulators respectively disposed for codes, each of the CDMA Demodulators having a matched filter 105 and an identifier 107; and a likelihood calculator 108 for each demodulator.