Pilot pattern allocation optimization method in digital amplitude modulation broadcast channel estimation

A digital AM broadcasting and pilot pattern technology, which is applied in pilot signal allocation, transmission path sub-channel allocation, digital transmission system, etc., can solve the problems of small pilot pattern search space, falling into local optimum, low efficiency, etc. To achieve the effect of expanding the scope of the solution space

Inactive Publication Date: 2020-05-15
聂阳
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above technical problems, the present invention provides a method for optimizing the allocation of pilot patterns in digital AM broadcast channel estimation, which solves the problem of small search space and low efficiency of pilot patterns in the optimization process, and avoids falling into local optimum during the optimization process Defects

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
  • Pilot pattern allocation optimization method in digital amplitude modulation broadcast channel estimation
  • Pilot pattern allocation optimization method in digital amplitude modulation broadcast channel estimation
  • Pilot pattern allocation optimization method in digital amplitude modulation broadcast channel estimation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049]The present invention will be further described below in conjunction with the accompanying drawings and embodiments. The method for optimizing the distribution of pilot patterns in digital amplitude modulation broadcasting (DRM) channel estimation disclosed by the present invention transforms the optimization of pilot patterns in DRM channel estimation into the minimum correlation of the sensing matrix in compressed sensing to solve the combined optimization problem, and uses the improved The quantum genetic algorithm solves the optimization problem and obtains the optimal deterministic pilot pattern;

[0050] Its specific optimization method includes the following steps:

[0051] In step (A), the minimum overall correlation of the pilot pattern corresponding to the sensing matrix is ​​used as the criterion in the optimization process, and the optimal allocation of the pilot pattern is transformed into a minimum solution to the combinatorial optimization problem;

[005...

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 pilot pattern allocation optimization method in digital amplitude modulation broadcast channel estimation. By minimizing the overall correlation of the perception matrix corresponding to the pilot pattern, the allocation of the pilot pattern is modeled as a combinatorial optimization problem, and the problem is solved using an improved quantum genetic algorithm. Individuals are coded by adopting quantum bits to obtain an initial pilot frequency pattern set. The overall correlation serves as a fitness function. The fitness value of each individual in the initial pilotfrequency pattern set is calculated, and finally population individuals are updated through a quantum revolving door. The steps are repeated for many times, and the pilot pattern with the maximum fitness value is selected as the optimal deterministic pilot pattern. According to the method, the problems of small search space and low efficiency of the pilot pattern in the search process are solved by utilizing the improved quantum genetic algorithm, and the defect of falling into local optimum in the search process is avoided. The optimized deterministic pilot pattern can obtain accurate channelinformation with less pilot overhead, and the spectrum utilization rate is effectively improved.

Description

technical field [0001] The invention relates to the technical field of digital amplitude modulation broadcasting, in particular to an allocation optimization method of pilot patterns in channel estimation of digital amplitude modulation broadcasting. [0002] technical background [0003] DRM (Digital Radio Mondiale) is a digital amplitude modulation broadcasting technology for frequencies below 30MHz. Since the channel in the transmission process is a bandwidth-limited multipath fading channel, DRM adopts orthogonal frequency division multiplexing technology to resist multipath interference and effectively improve spectrum utilization efficiency. In order to obtain better system performance, both coherent demodulation and channel equalization at the receiving end need to obtain accurate channel state information. Traditional DRM channel estimation methods use equally spaced pilot patterns to detect channel selective fading. Due to the use of more pilot signals in this meth...

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): H04L5/00
CPCH04L5/0048H04L5/0008
Inventor 聂阳
Owner 聂阳
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