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

Method and system for measuring power line channel transmission characteristics based on orthogonal spread spectrum sequence

A technology of power line channel and transmission characteristics, which is applied in distribution line transmission system, transmission system, line transmission monitoring/testing, etc., and can solve the problem of high signal-to-noise ratio

Active Publication Date: 2020-09-08
BEIJING SMARTCHIP MICROELECTRONICS TECH COMPANY +2
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, signal synchronization requires high signal-to-noise ratio of the received signal, and in actual power line channel measurement, channel measurement in a high-noise environment and low signal-to-noise ratio is often required, so the method of this patent has great limitations

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 system for measuring power line channel transmission characteristics based on orthogonal spread spectrum sequence
  • Method and system for measuring power line channel transmission characteristics based on orthogonal spread spectrum sequence
  • Method and system for measuring power line channel transmission characteristics based on orthogonal spread spectrum sequence

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0056] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0057] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

[0058] Such as figure 1 As shown, the power line channel transmission characteristic measurement method based on the orthogonal spread spectrum sequence according to the preferred embodiment of the present invention includes the following steps:

[0059] Step 101: The control unit at the sending end generates a test vector V of the frequency point f and the output amplitude A according to the measurement range and accuracy...

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 discloses a power line channel transmission characteristic measurement method based on an orthogonal spread spectrum sequence, and the method comprises the following steps that a transmitting end control unit generates a test vector V of a frequency point f and an output amplitude A according to a measurement range and a precision requirement; the spread spectrum modulation unit sequentially sets the frequency and amplitude of the modulation signal at a certain time interval Ts according to the test vector V, and performs spread spectrum sequence modulation to obtain a first output signal; the sending end coupling unit injects the first output signal of the spread spectrum modulation unit into the input end of the tested channel; the receiving end coupling unit receives the measurement signal from the tested channel and outputs a second output signal; the receiving end frequency conversion processing unit performs frequency conversion processing on the second output signal; the power correlation calculation unit performs sliding correlation integral operation on the variable frequency output signals and sends effective calculation results to the receiving end controlunit; and the receiving end control unit is used for counting and smoothing the effective calculation result and then calibrating the measurement result.

Description

technical field [0001] The invention relates to the technical field of power line carrier communication, in particular to a method and system for measuring power line channel transmission characteristics based on orthogonal spread spectrum sequences. Background technique [0002] For the low-voltage distribution network, the power line carrier communication generally has the following characteristics: 1) The time-varying nature of the communication channel. Due to the characteristics of the low-voltage distribution network such as very complex load conditions, large load variations, and many types of noise, each If the node impedance does not match, the signal is prone to reflection, standing wave, resonance and other phenomena, which makes the attenuation of the signal extremely complicated, resulting in a strong frequency selectivity of the power carrier communication channel. 2) Noise interference is strong and signal attenuation is large. Generally speaking, there are ma...

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): H04B3/46H04B3/48H04B3/54H04B1/707H04B1/7073
CPCH04B1/707H04B1/7073H04B3/46H04B3/48H04B3/54
Inventor 王贤辉韩兴李铮赵东艳刘浩王于波唐晓柯郝玮琦肖德勇陈奎熹罗丹
Owner BEIJING SMARTCHIP MICROELECTRONICS TECH COMPANY
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