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

A distributed beamforming method and system

A beamforming, distributed technology, applied in diversity/multi-antenna systems, multi-frequency code systems, space transmit diversity and other directions

Active Publication Date: 2017-05-03
BEIJING UNIV OF POSTS & TELECOMM
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the carrier synchronization method of distributed beamforming in the above-mentioned Non-Patent Document 1 cannot be used in this situation

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
  • A distributed beamforming method and system
  • A distributed beamforming method and system
  • A distributed beamforming method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that these embodiments may be practiced without these specific details. In addition, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

[0045] In this specification and claims, the expression "to SoA i "Sending a signal" actually refers to sending a signal for SoAi to receive. In addition, the ordinal numbers first, second and third are only used to distinguish similar devices, units, signals and physical quantities, etc., and do not mean that these devices, units, signals And the importance or order of physical quantities, etc.

[0046] figure 2 It shows a network in which a traditional wireless communication network and a cognitive wireless network that performs distributed beamforming coexist...

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

The invention provides a distributed beam forming method and system. The distributed beam forming method comprises the steps that (a), N network SoAs and network DoBs receive and estimate a first reference signal broadcast by a network DoA; (b), N SoAs receive and estimate a second reference signal broadcast by the network DoBs; (c), each SoA broadcasts an communication state message to other SoAs, and K SoAs which are marked as K(m) and finally participate in beam forming are screened out, wherein m ranges from one to K; (d), a downlink transmission signal is sent according to the sequence from the SoA K(1) to the SoA K(K); (e), an uplink transmission signal is sent according to the sequence from the SoA K(K) to the SoA K(1); (f), the SoA K(m) calculates a value of characteristic quantity of a carrier signal used when beam forming is carried out by estimating the signals, and the value is based to form a carrier for beam forming. The disturbance on the DoBs from beam forming signals is little, and power is high when the beam forming signals are transmitted to the DoA.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and in particular, to a distributed beamforming method and system. In particular, the invention is applicable to sensor networks, cognitive wireless networks. Background technique [0002] Beamforming is a technology in which multiple antennas are combined to form an antenna array to transmit the same signal. By adjusting the beamforming weighting coefficient of each antenna, the signal strength of the receiving end at certain locations is increased. Beamforming technology can improve signal-to-noise ratio, increase security, and extend communication range. Specifically, if the signal-to-noise ratio is kept the same, the total energy consumed by N omnidirectional antennas for beamforming in the case of carrier synchronization is only 1 / N of the energy consumed by a single omnidirectional antenna directly sending signals, so the Beamforming technology can greatly save ener...

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 Patents(China)
IPC IPC(8): H04L27/26H04B7/04H04B7/06H04W84/18
Inventor 郭莉张超
Owner BEIJING UNIV OF POSTS & TELECOMM