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Wireless communication apparatus

A wireless communication device and wireless communication technology, applied in the directions of multiplexing communication, communication between multiple stations, diversity/multi-antenna system, etc., capable of solving problems such as reduced reception characteristics

Inactive Publication Date: 2007-03-14
PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to Figure 8, it can be known that when the phase deviation (drift) increases, the reception characteristics decrease

Method used

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no. 1 example

[0066] FIG. 1 is a block diagram of a wireless communication device according to a first embodiment of the present invention. The wireless communication device 100 includes a plurality (N) of antennas 101-1 to 101-N, a plurality (N) of transmission-reception switching devices (SW) 102-1 to 102-N, a plurality (N) of transmission circuits 103-1 to 103-N, a plurality (N) of receiving circuits 104-1 to 104-N, channel estimation means 105, received signal weighting and combining means 106, receiving weight generating means 107, transmitting weight generating means 108, Transmission signal weighting means 109 , correction value detection means 110 , and correction value memory 111 .

[0067] Here, consider that the wireless communication device 100 shown in FIG. 1 is a mobile terminal, for example, the base station device is a wireless communication device for communicating with the wireless communication device 100

[0068] FIG. 2 is a block diagram of a base station device for co...

no. 2 example

[0166] Fig. 7 is a block diagram of a wireless communication device according to a second embodiment of the present invention. The wireless communication device shown in FIG. 7 includes multiple (N) antennas 701-1 to 701-N, multiple (N) transmit-receive switching devices (SW) 702-1 to 702-N, multiple (N) a) transmitting circuits 703-1 to 703-N, multiple (N) receiving circuits 704-1 to 704-N, channel estimating means 705, received signal weighting and combining means 706, receiving weight generating means 707, transmitting weight generating means means 708, transmission signal weighting means 709, correction value detection means (phase correction value detection means) 710, correction value memory 711, a plurality (N) of signal distribution means 713-1 to 713-N, and amplitude correction value detection means 714.

[0167] By adding signal distribution means 713-1 to 713-N and amplitude correction value detection means 714 to the wireless communication device 100 according to ...

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Abstract

In a wireless communication apparatus adopting a time division duplex system for executing transmission and reception using a plurality of antennas, deviation of amplitude and phase occurring between transmission and reception circuits is detected and corrected using a communication signal. Channel estimation means 105 detects channel information based on reception output of reception circuits 104-1 to 104-N provided in a one-to-one correspondence with a plurality of antennas 101-1 to 101-N. Correction value detection means 110 finds a correction value for correcting deviation occurring between each of transmission circuits 103-1 and each of the reception circuits 104-1 to 104-N based on the channel information. A wireless communication apparatus 100 transmits an already known signal (training signal) to a base station with which the wireless communication apparatus conducts communications. The base station executes channel estimation based on the already known signal and generates and transmits a correction signal (probe signal). The correction value detection means 110 of the wireless communication apparatus 100 detects the correction value using the correction signal (probe signal) .

Description

technical field [0001] The present invention relates to a wireless communication device for wireless communication using multiple antennas. Background technique [0002] In recent years, with the rapid development of multimedia communication, the demand for high-speed, large-capacity data transmission in wireless communication has also increased. Accordingly, there is a need for a communication method for performing high-speed, large-capacity data transmission using frequencies in a limited frequency band efficiently. Then, attention is directed to communication methods that use multiple antennas on the sending and receiving sides to communicate. Since multiple antennas are used for both transmission and reception, if different signals are transmitted at the same frequency at the same time, the transmitted signals can be separated for reception only by performing appropriate processing on the signals on the receiving side or both. Therefore, the transmission capacity can b...

Claims

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Application Information

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IPC IPC(8): H04B7/06H04B7/26H04B7/08H04J3/06H04B7/10
Inventor 汤田泰明岸上高明深川隆中川洋一高林真一郎
Owner PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA