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

Carrier compensation system and carrier compensation method

A compensation system and carrier technology, applied in the field of communication, can solve the problems of long frequency estimation time and poor carrier compensation accuracy, and achieve the effects of stable frequency error, loop bandwidth optimization, and good carrier recovery

Active Publication Date: 2012-01-25
华力智芯(成都)集成电路有限公司
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of the above carrier compensation method are: this method is easily affected by channel multipath, and it is also related to timing, the frequency estimation time is longer, and the accuracy of carrier compensation is poor

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
  • Carrier compensation system and carrier compensation method
  • Carrier compensation system and carrier compensation method
  • Carrier compensation system and carrier compensation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A schematic structural diagram of a carrier compensation system provided by an embodiment of the present invention is as follows figure 1 As shown, it includes: a despreading unit, a digital phase-locked loop unit, a phase estimation unit, a demultiplexing unit, a demapping unit and a forward error correction unit.

[0026] In an actual environment, the signal received by the above-mentioned despreading unit can be a combined signal of 7 kinds of spreading ratios such as 64 times spreading, and the above-mentioned despreading unit is used to perform despreading processing on the received signal, The despread processed signal is transmitted to the phase estimation unit and the digital phase locked loop unit. The signal received by the despreading unit is a signal after clock synchronization processing.

[0027] The above-mentioned phase estimation unit is used to perform phase estimation on the frame header part of the signal output by the despreading unit to obtain an ...

Embodiment 2

[0076] This embodiment provides a carrier compensation method, including the following processing steps:

[0077] Step 11, performing despreading processing on the received signal, performing phase estimation on the despreading processed signal, obtaining an initial phase estimation value, and transmitting the initial phase estimation value to a digital phase-locked loop road.

[0078] Step 12, the digital phase-locked loop performs carrier compensation on the frame header part of the signal after the despreading process according to the phase estimation value, and outputs the signal after carrier compensation, and the digital phase-locked loop The road also performs phase detection and filtering processing on the signal after the despreading process to obtain a phase compensation value, and carries out carrier compensation to the subsequent signal after the despreading process according to the phase compensation value, and the signal after the carrier compensation output.

[...

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 embodiment of the invention provides a carrier compensation system and a carrier compensation method. The carrier compensation system comprises a de-spreading spectrum unit, a phase estimation unit and a digital phase-locked loop unit, wherein the de-spreading spectrum unit is used for performing de-spreading spectrum processing on a received signal and transmitting the signal which is subjected to de-spreading spectrum processing to the phase estimation unit and the digital phase-locked loop unit; the phase estimation unit is used for performing phase estimation on the signal which is transmitted by the de-spreading spectrum unit to obtain an initial phase estimation value, and transmitting the initial phase estimation value to the digital phase-locked loop unit; and the digital phase-locked loop unit is used for performing carrier compensation on a frame header part of the signal which is transmitted by the de-spreading spectrum unit according to the phase estimation value, outputting the signal which is subjected to carrier compensation, performing phase discrimination and filtration on the signal which is transmitted by the de-spreading spectrum unit to acquire a phase compensation value, performing carrier compensation on the signal which is subsequently transmitted by the de-spreading spectrum unit according to the phase compensation value, and outputting the signal which is subjected to carrier compensation. By the embodiment of the invention, accurate carrier compensation can be effectively performed in a wireless communication system.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of communications, and in particular to a carrier compensation system and method. Background technique [0002] Carrier compensation in a wireless communication system involves synchronizing the signal received at the receiver to a reference that is consistent with the signal sent by the transmitter. [0003] A carrier compensation method in the prior art includes a carrier compensation method based on pilot signals, which includes adding a special structure, ie, a cyclic prefix, in the time domain, and inserting continuous pilots and scattered pilot signals in the frequency domain. Then, a typical OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) frequency estimation method is used to perform carrier compensation. [0004] The disadvantages of the above carrier compensation method are: the method is easily affected by channel multipath, ...

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): H04B1/7097H04L27/22H04L25/03
Inventor 刘解华刘凯敬军安儒聪杨陆
Owner 华力智芯(成都)集成电路有限公司
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