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

Impact filtering method for strengthening asymmetric binary modulating signal

A modulated signal and impact filtering technology, applied in electrical components, impedance networks, digital technology networks, etc., can solve problems such as insufficient steepness, and achieve effective transmit power, strong ability to filter noise, and high transmission efficiency.

Active Publication Date: 2013-02-13
苏州东奇信息科技股份有限公司
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it can better maintain or even highlight the waveform characteristics of the ABSK modulation signal ( image 3 (b)), but the overall filter characteristics ( image 3 (a)) is far from steep enough, the ability to remove noise and enhance the signal still has a lot of room for improvement

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
  • Impact filtering method for strengthening asymmetric binary modulating signal
  • Impact filtering method for strengthening asymmetric binary modulating signal
  • Impact filtering method for strengthening asymmetric binary modulating signal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] Based on a single zero-pole pair, adding one or more poles can produce a more intense and obvious impact waveform at the information modulation of the ABSK signal than a single zero-single-pole IIR filter, and the filter bandwidth is significant. Narrowing, the output signal-to-noise ratio is greatly improved, and even when the signal is completely submerged by noise (signal-to-noise ratio SNR<0), the modulation information of the signal can be highlighted in the form of overshoot, so it can be called digital Impact filters (Impacting Filters) or ABSK signal digital enhancer. However, the following technical requirements must be observed:

[0038] 1. The zero and pole points are very close to present notch-frequency selection characteristics in a very narrow neighborhood of the center frequency of the filter, but the zero frequency cannot be between the pole frequencies. That is, if the zero frequency is at the low end of the filter frequency, it is below the frequenci...

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 an impact filtering method for strengthening an asymmetric binary modulating signal, belonging to the digital information reception technical field. The impact filtering method for strengthening the signal is based on a special infinite impulse response (IIR) narrowband digital band-pass filter, the filter is composed of simple zero and multiple poles, and extremely narrow trapped wave-frequency selection characteristic can be presented at the center frequency of the filter, so that filtering output waveform adaptive to the asymmetric binary modulating signal produces obvious and intense parasitic amplitude modulation impact at information modulation position, output signal to noise ratio can be greatly improved, and modulation information of the signal even can be highlighted in overshooting form under the condition that the signal is completely submersed by the noise, thus transmission performance of the asymmetric binary modulating signal can be obviously improved and the structure of a receiver can be simplified.

Description

technical field [0001] The invention relates to a special impact filter method, which is used to enhance the signal-to-noise ratio of an asymmetric binary modulation signal, and belongs to the technical field of digital information reception. Background technique [0002] Keying the amplitude (2ASK), frequency (2FSK) or phase (2PSK) of the sinusoidal carrier within the symbol period T is the basic binary (binary) modulation mode for digital communication, radar, sonar and other information systems. If the modulation period τ<T, asymmetric binary shift keying (ABSK: Asymmetric Binary Shift Keying) modulation is obtained. In general, the binary modulation used in digital communication is symmetrically modulated by "0" and "1", for example, in the following unified binary amplitude / phase modulation expression: [0003] f 0 (t) = Asinω c t, 0≤t<T [0004] f 1 ( t ) = ...

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): H03H17/06
Inventor 吴乐南冯熳高鹏
Owner 苏州东奇信息科技股份有限公司
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