Fixing beam shaping device and method applied to CDMA system

A fixed beam and beam technology, applied in code division multiplexing systems, selection devices, diversity/multi-antenna systems, etc., can solve problems such as increasing the complexity of the system, reduce the amplitude of the transmitted signal, achieve simplicity, and protect investment. effect of benefit

Inactive Publication Date: 2004-10-27
ZTE CORP
View PDF4 Cites 45 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above problems, the present invention proposes a fixed beamforming device and its method applied in the CDMA system, so that the signal energy of the sector beam has equal or...

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
  • Fixing beam shaping device and method applied to CDMA system
  • Fixing beam shaping device and method applied to CDMA system
  • Fixing beam shaping device and method applied to CDMA system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] The invention uses the same antenna array to generate a cluster of fixed narrow beams and a sector beam, and applies it to a CDMA mobile communication system. In order to achieve the above purpose, the system of the first embodiment of the present invention mainly includes an antenna array, a fixed narrow beamforming network (Butler array) and a phase adjustment device. The fixed narrow beamforming network (Butler array) and the phase adjustment device together form a sector beam and a fixed narrow beamforming device.

[0051] According to the method provided by the present invention, a fixed narrow beam forming network (Butler array) and an antenna array are firstly used to realize a cluster of fixed narrow beams. Beamforming needs to adjust the weighting coefficient of the signal and perform shifting and equal processing. The processing can be performed at the baseband or at the radio frequency end. This article mainly discusses beamforming at the radio frequency end....

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

One fixed narrow beam and one sector beam are generated by an antenna array. Multiple fixed narrow beams are realized by shaping technique of simulating fixed beams and using shaping network (Butler array) of fixed narrow beams. A sector beam covering whole sector is formed through controlling initial phase of beam at Butler array side by using phasing adjustment device. Signal energy of sector beams at side of each component of antenna array is equal or approximately equal. Thus, amplitude of transmitted signal of each component of antenna array is lowered.

Description

technical field [0001] The present invention relates to a fixed beam forming method and device for an intelligent antenna system, in particular to a method and device for implementing intelligent antenna technology in a Code Division Multiple Access (CDMA) mobile communication system. Background technique [0002] In recent years, the CDMA mobile communication system has been greatly developed and applied. The most typical example is the currently commercially available CDMA2000 mobile communication system. Compared with mobile communication systems of other systems, such as time division multiple access TDMA and frequency division multiple access FDMA systems, CDMA systems have advantages in capacity and service quality, but co-channel interference (CCI) and wireless channel interference between CDMA system users On the other hand, the number of mobile communication users is increasing rapidly, and people's requirements for the quality of mobile calls are also continuously ...

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
IPC IPC(8): H04B7/06H01Q3/40H01Q25/04H04B7/08H04J13/02H04W16/28
Inventor 张彭李立林
Owner ZTE CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap