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

Adaptive predicting smoothing RAKE reception method and receiver

An adaptive prediction and receiving method technology, applied in the direction of code division multiplexing system, electrical components, transmission system, etc., can solve the problems of channel interference, small Doppler frequency shift tolerance, performance deterioration, etc., and achieve fast Strong adaptability to changes, reduced system delay, and strong multipath resistance

Inactive Publication Date: 2002-01-23
INST OF TELECOMM TRANSMISSION MINIST OF INFORMATION IND +1
View PDF0 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of RAKE receiver requires that the phase disturbance caused by channel interference be limited to a small range, and the tolerance to channel interference and Doppler frequency shift is small. Once the above restrictions are not met, the performance will deteriorate sharply

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
  • Adaptive predicting smoothing RAKE reception method and receiver
  • Adaptive predicting smoothing RAKE reception method and receiver
  • Adaptive predicting smoothing RAKE reception method and receiver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The preferred way to realize the invention is illustrated below in conjunction with the accompanying drawings:

[0020] see figure 1 : Among them, 1 is the short filter bank, 2 is the medium filter bank, and 3 is the long filter bank. The difference between the short filter bank 1, the medium filter bank 2 and the long filter bank 3 is that the short filter bank 1 The lengths of the two key filters in the medium are max{M-ΔM, 0} and max{N-ΔN, 0}, the lengths of the two key filters in the middle filter bank 2 are M and N, and the lengths of the long filter bank 3 The two key filter lengths are min{M+ΔM, M max} and min{N+ΔN, N max}, 4 is a three-choice selector, 5 is a signal-to-noise ratio measurement and comparator, and 6 is a filter parameter database.

[0021] see figure 2 : Wherein, 7 is the matched filter of the Kth (1<=K<=P) path data, 8 is the matched filter of the Kth path pilot and the delay search tracker of the Kth path, and 9 is the Kth path Pilot filte...

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 present invention can eliminate the multipath effect, channel interference and Doppler effect in mobile communication. The reception method includes the direct treatment of the received RF baseband signal with filter, multiplier and preset data and the direct feeding of the treated signal to the software adjudication decoder. The RAKE receiver of the present invention consists of matching filter, delay search tracker, predicting filter, smoothing filter, delay regulator, multiplier, multipath adder, filter parameter data base, S / N measuring comparator and one-out-of-three selector.

Description

(1) Technical field: [0001] The invention belongs to the field of Code Division Multiple Access (CDMA) mobile communication. Especially related to adaptive predictive smooth RAKE receiving method and receiver (two) background technology: [0002] Code Division Multiple Access (CDMA) spread spectrum communication is a multiple access method that is widely used in communication systems at present. It has excellent characteristics such as anti-interference, anti-multipath fading and large system capacity. In the CDMA mobile communication system, there are direct waves and reflected waves in the propagation of space electromagnetic waves, so the received signal is the multipath superposition of the transmitted signal after propagation, which is the multipath effect of reception. At the same time, the random noise of the space channel has random interference on the amplitude and phase of the electromagnetic wave of each path, and this interference is called channel interference...

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): H04B1/16H04B1/7115
Inventor 卫国张铎邱玲朱近康
Owner INST OF TELECOMM TRANSMISSION MINIST OF INFORMATION IND
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