Radio transmission apparatus and radio communication method

A wireless transmitting device and transmitting device technology, applied in the direction of space transmitting diversity, radio transmission system, diversity/multi-antenna system, etc., can solve the problems of impossible communication, unable to increase communication capacity all the time, unable to meet transmission rate, etc.

Inactive Publication Date: 2004-04-14
PANASONIC CORP
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Problems solved by technology

[0005] However, in the conventional method described above, there is a case where the receiving side cannot perform separation and reproduction of the transmission signal subjected to spatial multiplexing in principle depending on the interference from another cell and the condition of the propagation path
For this reason, the communication capacity cannot be increased all the time, and there is a possibility that such a situation will occur that the demand for the expected transmission rate cannot be satisfied
Also, there is a possibility that a communication impossible state will occur according to this

Method used

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  • Radio transmission apparatus and radio communication method
  • Radio transmission apparatus and radio communication method
  • Radio transmission apparatus and radio communication method

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Embodiment Construction

[0014] An embodiment of the present invention will be explained in detail with reference to the drawings.

[0015] figure 1 shows a structural block diagram of a wireless transmitting device according to an embodiment of the present invention, and figure 2 shows the execution with figure 1 Shown is a structural block diagram of a wireless receiving device for wireless communication of the wireless transmitting device. figure 1 shows the wireless transmitter and figure 2 The shown wireless receiving device can be installed in the same wireless communication device.

[0016] The wireless communication device is an OFDM wireless communication device, figure 1 The wireless transmitting device shown in is a transmitter for OFDM signals, figure 2 The wireless receiving device 200 shown in is a receiver for OFDM signals. Since the influence of multi-path delay spread can be reduced in high-speed digital signal transmission through multi-carrier conversion and guard interval ...

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Abstract

A radio transmission apparatus capable of further improving the frequency use efficiency and the transmission speed while maintaining the communication quality. In this apparatus, switching is performed according to the transmission path condition between the followings: transmitting different information transmission signal A <> transmission signal B with an identical frequency from a plurality of antennas 106, 116 space multiplexing, transmitting different information transmission signal A <> transmission signal B with different frequencies from the plurality of antennas 106, 116 frequency multiplexing, transmitting identical information transmission signal A = transmission signal B with an identical frequency from the plurality of antennas 106, 116 space diversity, and transmitting identical information transmission signal A = transmission signal B with different frequencies from the plurality of antennas 106, 116 frequency diversity.

Description

technical field [0001] The invention relates to a wireless transmitting device and a wireless communication method used in a digital wireless communication system. Background technique [0002] Preparations for a worldwide unified standard broadband wireless access system are currently underway. Also, for the next generation, it is expected to establish a mobile broadband wireless access system that makes full use of abundant frequency resources close to the submillimeter wave band. [0003] As a current broadband wireless access system, the modulation method used in one of the systems is Orthogonal Frequency Division Multiplexing (OFDM) using a frequency band of 5 GHz under a worldwide unified standard, and it is adaptively adjusted according to the condition of the propagation path. Controls the number of modulation multivalues ​​corresponding to each subcarrier. According to this method, under good propagation path conditions, a large number of modulation values ​​can b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04B7/12
CPCH04B7/12H04B7/0613
Inventor 石川公彦
Owner PANASONIC CORP
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