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

Rapid scanning method for wave reaching angle(DOA)

A fast scanning and DOA technology, applied in the direction of space transmit diversity, electrical components, radio/inductive link selection arrangement, etc., can solve the problems of not being able to know the DOA tap and the large amount of calculation

Inactive Publication Date: 2007-02-07
倪明
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amount of calculation is large, and only the DOA of the path signal with the maximum power can be obtained, and the tap corresponding to the DOA cannot be known

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
  • Rapid scanning method for wave reaching angle(DOA)
  • Rapid scanning method for wave reaching angle(DOA)
  • Rapid scanning method for wave reaching angle(DOA)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0063] The present invention is described in detail below in conjunction with accompanying drawing:

[0064] From figure 1 The a of the first antenna of the steering vector can be analyzed * The real and imaginary parts of (Θ, 1) are symmetrical about 180 degrees. The complex numbers of Θ=0:90 and Θ=180:270 are conjugates of each other; the complex numbers of Θ=90:180 and Θ=270:350 are conjugates of each other; the complex numbers of Θ=0:90 and Θ=90:180 are in Defolding on the horizontal axis; complex numbers of Θ=180:270 and Θ=270:350 are defolded on the horizontal axis.

[0065] From figure 2 The a of the second antenna of the steering vector can be analyzed * The real and imaginary parts of (Θ, 2), with a * (Θ, 1) The characteristics of the real and imaginary parts, and relative to a * (Θ, 1) has a 45 degree phase shift. a * (Θ, k) has a phase shift of 45 degrees in turn, which is not shown here.

[0066] In a specific embodiment, the designed scanning strategy is...

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 relates to a quick scanning method of DOA, used in wireless communication system and phase-control array radar which use wireless array, wherein it can supply the DOA relative to all taps inside the search window. Said invention can be used in system or in mobile station; since the period of triangle function, only via scanning 90 degrees at first phase, and the results in other three phases can be derivated, to reduce the calculations.

Description

technical field [0001] The invention relates to a fast scanning method of DOA in a radio communication system and a phased array radar system using an antenna array. Especially it relates to a new, effective and fast DOA estimation method in TD-SCDMA receiver. Background technique [0002] In a communication system, the receiver needs to filter the received signal, filter out noise interference, and recover the transmitted data. The smart antenna composed of the antenna array uses DOA as the parameter of the spatial filter, and DOA can also be used for shaping the direction pattern of the forward signal. The TD-SCDMA system uses a circular antenna array with 8 array elements, adopts the estimation method of DOA scanning, and the base station receiver has undergone the following processing: [0003] Separating the data part and the training sequence part of the received signal, and selecting the training sequence part for multi-user joint channel estimation. [0004] Using...

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): H04B7/08H01Q3/26H04Q7/22H04Q7/30
Inventor 倪明
Owner 倪明
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com