Digital pre-distortion method of frequency hopping communication system

A digital pre-distortion and frequency-hopping communication technology, applied in the field of digital pre-distortion, can solve the problems of inability to complete the linearization of the frequency-hopping communication system, signal distortion, etc., and achieve the effect of fast real-time pre-distortion and less hardware resources

Active Publication Date: 2015-02-18
西安烽火电子科技有限责任公司
View PDF5 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the frequency hopping communication system, the frequency of the transmitter is constantly changing according to certain rules. At the same time, the RF power amplifier of the frequency hopping communication system produces signal distortion cause

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
  • Digital pre-distortion method of frequency hopping communication system
  • Digital pre-distortion method of frequency hopping communication system
  • Digital pre-distortion method of frequency hopping communication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] In order to clearly illustrate the technical solution of the present invention, adaptive digital pre-distortion is described here. In the actual application process, the predistortion technology has the following unstable factors: due to temperature changes, device aging, etc., the characteristics of the power amplifier change, as well as the bias voltage, channel change, input power change, and component parameter drift, etc., make the expected nonlinearity very large Large changes; the microwave parameters of the device change, which causes the phase change of the main link and makes the pre-distortion invalid. These effects are particularly obvious when working in a wide frequency band (frequency bandwidth greater than 1 octave), because the randomness of the excitation power and the random variation of the peak-to-average ratio of the signal affect the compensation; the random variation of the spectral distribution of the excitation signal will cause Compensation ch...

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 belongs to the technical field of frequency hopping communication system reliability and discloses a digital pre-distortion method of a frequency hopping communication system. The method includes: acquiring multinomial coefficients, corresponding to the ith frequency point and the jth temperature, in the expression of a digital pre-distortion device function, and using x(n) to indicate n-moment input signal of a digital pre-distortion device; acquiring the simplified expression of the digital pre-distortion device function, and by the digital pre-distortion device, acquiring the value of each signal polynomial in a lookup table according the signal received at the current moment and the signal received at Q-1 moment before the current moment; calculating the value of the digital pre-distortion device function F[x(n)], and completing linear processing of the radio frequency amplifier in the frequency hopping communication system according to the value of the digital pre-distortion device function F[x(n)].

Description

technical field [0001] The invention belongs to the technical field of frequency hopping communication system reliability, and in particular relates to a digital predistortion method for a frequency hopping communication system, which solves the linearity problem of the frequency hopping communication system and aims to reduce the Non-linear distortion, lower bit error rate. Background technique [0002] In the frequency hopping communication system, in order to improve the output power and efficiency, the radio frequency power amplifier (referred to as radio frequency power amplifier) ​​usually works in the nonlinear region, which will inevitably produce third-order and fifth-order intermodulation products, showing strong nonlinearity. Linearization technology is an effective way to solve the nonlinear problem of RF power amplifiers. Linearization technology is mainly divided into two categories: analog method and digital method. Analog methods include analog predistortion...

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
IPC IPC(8): H04L25/49
Inventor 郑光明杨勇王小军刘为周勇敢张凯李林峰葛亮
Owner 西安烽火电子科技有限责任公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap