Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method and device for space-time diversity transmitting based on intelligent autema CDMA system

A smart antenna and diversity transmission technology, applied in the field of wireless communication, can solve the problems of insignificant RAKE combined gain and dropped calls at the receiving end, and achieve the effect of reducing the dynamic range and total power, and reducing the manufacturing price.

Inactive Publication Date: 2008-02-13
ZTE CORP
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The main purpose of the present invention is to change the current situation that there is only one path in the transmission signal in the prior art, overcome the various shortcomings caused by it, and solve the problem that the RAKE combination gain at the receiving end is not obvious and may cause problems in the prior art. call drop problem

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
  • Method and device for space-time diversity transmitting based on intelligent autema CDMA system
  • Method and device for space-time diversity transmitting based on intelligent autema CDMA system
  • Method and device for space-time diversity transmitting based on intelligent autema CDMA system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] The general smart antenna system structure is shown in Figure 2. The output signals of each antenna element and the output of the smart antenna are processed by the smart antenna algorithm to obtain a set of weights corresponding to each antenna array; this set of weights is multiplied by After the antenna output, the output of the smart antenna system can be obtained by adding up the results. Wireless signals enter the system through an antenna array (20), wherein the antenna array (20) is composed of a plurality of antenna elements (201-203). The signals output by the antenna pass through their respective radio frequency channels (210-213), carry out weighted summation in the signal synthesis unit (22), form a one-dimensional signal, and input it to the subsequent system for processing. And the weight coefficient in the signal synthesis unit (22) is provided by the smart antenna algorithm module (23).

[0056] In the receiver system, the spatial information of the us...

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

A space diversity emitting method for CDMA system, based on intelligent antenna CDMA system is to utilize the weighted coefficient corresponding to the intelligent antenna different multipath separately to get multiset emitting signals of different antenna arrays to emit the said signal via RE channel and antenna according to certain time interval. A space-time diversity emitting device based on the above mentioned method includes: antenna array and related RF channel, intelligent antenna system, RAKE receiver receiving an emitting conversion system and time-space diversity emitting device, changing the present state of only one path for signal emitting, solving the problem of not sharp PAKE merge gain at the receiving end or possible breaking.

Description

Technical field: [0001] The present invention relates to a kind of method and the device of time-space diversity transmitting of CDMA system based on smart antenna, relate in particular to a kind of method and the device of time-space diversity in code division multiple access (CDMA) communication system; The present invention can be used for code A division multiple access (CDMA) system, including IS-95, WCDMA, CDMA2000 and TD-SCDMA systems, a node B and a transmitter part of a multi-antenna user equipment, belongs to the technical field of wireless communication. Background technique: [0002] In mobile communication, there is a phenomenon of multipath transmission, that is, the signal is transmitted from the transmitter to the receiver through multiple transmission paths. Each transmission path has different transmission delays, different fading and different phases; when the multi-path received signals are mixed and arrive at the receiver, it will cause multipath fading....

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): H04J13/02H04Q7/20H04B7/02H04B7/26
Inventor 吴涛谢澜涛
Owner ZTE CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com