Radio communication device with more channel capacity and less feedback information, and method therefor

Abstract

A radio communication device with maximum channel capacity. The apparatus includes: a transmitter for allocating the transmit power of each baseband signal of each transmit antenna using feedback information recovered from the feedback signal, modulating the baseband signal with the allocated transmit power, and converting the baseband signal into an RF signal The RF signal is then transmitted; a receiver for estimating the channel response during which the received RF signal was transmitted, for recovering the information signal from the RF signal using the estimated channel response, and wirelessly converting the The information is sent to the transmitter as a feedback signal, and the transmit power is calculated and assigned based on the estimated channel response. In this channel capacity maximizing radio communication device, only information about the amount of transmission power to be allocated to the first transmission antenna is fed back. Therefore, although the amount of information in the feedback signal is minimized the channel capacity can still be maximized. In addition, decoupling transitions are not required, reducing hardware manufacturing size and cost.

Description

field of invention [0001] The present invention relates to radio communication techniques using a plurality of receiving / transmitting antennas, and more particularly to a radio communication apparatus and method for allocating transmission power to maximize channel capacity. Background technique [0002] The channel response information between the transmitter and the receiver should be known by the transmitter and the receiver in order to detect the optimum channel capacity in radio communication. However, usually the receiver knows the channel response information, but the transmitter does not know the channel response information. Therefore, channel response information must be fed back from the receiver to the transmitter. Here, "channel response information" referred to in radio communication using a plurality of antennas refers to information on a channel response between each transmit antenna and each receive antenna. The channel response information increases propo...

AI Technical Summary

Problems solved by technology

Therefore, with this water-filled power allocation method, the channel capacity in conventional radio communication devices can be maximized, but a large amount of information must be fed back from the receiver to the transmitter

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