Communication system for controlling directivity based on...

Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail

Reexamination Certificate

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Details

C455S522000, C455S226300

Reexamination Certificate

active

07907973

ABSTRACT:
A directivity control section103performs weight control over a received signal using channel estimation and optimum weights, performs processing such as generation of the received signal and generates a plurality of weight-controlled transmission signals. A received signal demodulation section104extracts an SIR measurement result from the received signal. A scheduler section105decides which terminal should be assigned to a channel to be adaptively modulated from the SIR measurement result and at the same time decides the modulation multi-valued number and coding rate of the signal to the terminal. A transmission signal generation section106modulates a transmission signal such as a reference signal or packet data. A directivity switching instruction section107controls switching between directivities so as to maintain the same directivity after the reference signal is transmitted with a directivity until packet data is transmitted with a directivity. This makes it possible to receive packet data with high quality, improve efficiency of a radio frequency band and maximize communication path utilization efficiency.

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M. Sawahashi, et al.; “High-Speed Packet Wireless Access in W-CDMA and Its Radio Link Performance” IEICEB vol. J84-B, No. 10, pp. 1725-1745, Oct. 2001 with partial English translation.
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Japanese Office Action dated Jun. 6, 2006 with English translation.

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