Unlock instant, AI-driven research and patent intelligence for your innovation.

Wireless communication system, transmitting apparatus, transmitting method, program, and recording medium

A technology for radio resources and control devices, applied in radio transmission systems, wireless communications, diversity/multi-antenna systems, etc., can solve problems such as characteristic deterioration, and achieve the effect of reducing characteristic deterioration

Inactive Publication Date: 2008-03-05
NEC CORP
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when compared with a scheme in which signal processing is performed by the transceiver using the same channel information, even in the case of using the maximum likelihood detection method in which the best characteristics are expected, the characteristics are deteriorated

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Wireless communication system, transmitting apparatus, transmitting method, program, and recording medium
  • Wireless communication system, transmitting apparatus, transmitting method, program, and recording medium
  • Wireless communication system, transmitting apparatus, transmitting method, program, and recording medium

Examples

Experimental program
Comparison scheme
Effect test

example 3

[0110] FIG. 10 is a flowchart showing processing of the transmission signal control unit 72 according to the third example of the present invention.

[0111] In this example, although the transmitter is the same as that of the first example, the operation of the transmission signal control unit 72 is different from that of the first example. Therefore, the difference will be described in detail. However, although this example performs a total of 150 Mbps of transmission, the operation in the transmission signal generation unit 71 is not substantially changed, and thus its description is omitted.

[0112] Referring to FIG. 10, the summary information extraction module 73 disclosed in the signal controller 72 extracts summary information from a received signal (step S101). Here, it is assumed that the summary information items are the required rate, channel change speed, and the number of radio resources required to feed back the second summary information, and each is: p(1)=[4...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Although the beam forming is a very excellent method, yet particularly in a case of a plurality of users existing, there occurs the stringency of wireless resource of an inverse line caused by feedback of more-than-necessary information and also occurs the characteristic degradation of the line caused by delay in transmission time. In a transmitting apparatus (1), which constitutes a wireless communication system, antennas (13-1 to 13-M) and duplexers (14-1 to 14-M) are used to perform receptions. A transport signal control apparatus (12) is used to extract user's profile information and synthetically decide wireless resource amounts, the arrangement thereof and the application / non-application of beam forming. A transport signal generating apparatus (11) generates, in accordance with the decided resource distribution and application / non-application of beam forming, a transport signal from the user's transport data. Then, the duplexers (14-1 to 14-M) and antennas (13-1 to 13-M) are used to transmit the signal.

Description

technical field [0001] The present invention relates to radio communication systems and in particular to a transmitting device comprising a plurality of antennas. Background technique [0002] As described in Non-Patent Document 1, in a multiple-input multiple-output (MIMO, Multi-Input Multi-Output) system in which the transceiver uses multiple antennas, signal processing using channel information in the receiver and also transmitting signal processing using the same channel information in the processor, and therefore considerable improvement in characteristics is expected. Among these systems, a scheme in which channel information between transceivers is represented as a matrix and a transmitter performs transmit beamforming by using decomposition of the matrix is ​​the highest in terms of characteristics. This is because, for a plurality of independent propagation paths formed by signal processing in the transceiver, the transmission parameters can be controlled according...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04J15/00H04B7/04H04B7/10H04B7/26H04J99/00H04W16/28
CPCH04B7/0617H04W16/28H01Q3/26H04B7/0615H04W28/16
Inventor 伊藤匠
Owner NEC CORP