Mobile communicating appts. comprising antenna array and mobile communicating method

Abstract

Provided are a mobile communication apparatus having an antenna array and a mobile communication method performed in the mobile communication apparatus. The mobile communication apparatus includes a base station and mobile station, each having an antenna array. The mobile station measures the downlink characteristics of a channel for each transmitter / receiver antenna pair from a signal received from a base station calculates the eigenvalues and eigenvectors of the channel propagation matrix, uses the eigenvectors as basis, determines long-term information in which the correlation property of the channel for each antenna has been reflected from the measured downlink characteristics, transforms the long-term information into a feedback signal, and transmits the feedback signal to the base station. The base station receives the feedback signal, restores the long-term information from the received feedback signal, performs basis mapping and basis transformation on a dedicated physical channel signal using the restored long-term information, adds the basis-mapped and basis-transformed signal to each of pilot channel signals, and transmits the addition results to the mobile station. Accordingly, information in which the downlink characteristics of a space channel has been reflected is fed back from the mobile station to the base station, thus minimizing the effects of fading, interference, and noise and maximizing throughput.

Description

technical field [0001] The present invention relates to the field of mobile communication, more particularly to a mobile communication device including an antenna array, which can reduce the effects of fading, interference and noise, and to a mobile communication method executed on the mobile communication device . Background technique [0002] The next-generation mobile communication system can transmit information faster than the current PCS mobile communication system. Europe and Japan have adopted the Wideband Code Division Multiple Access (W-CDMA) system, which is an asynchronous system according to the wireless access standard, while North America has adopted the CDMA-2000 (Multi-Carrier Code Division Multiple Access) system, which is a synchronized system. [0003] In a general mobile communication system, several mobile stations communicate with each other through a base station. In order to transmit information at high speed, a mobile communication system should ...

AI Technical Summary

Problems solved by technology

However, since the first and second TxAA modes are constructed assuming that the channels of the 2 antennas constituting the space-time channel are completely independent from each other, these antennas cannot be effective when the number of antennas and the characteristics of the space-time channel vary use

In addition, the first and second TxAA modes cannot be applied in an environment using more than 2 antennas and cannot provide good performance even with 3 or more antennas

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