Unlock instant, AI-driven research and patent intelligence for your innovation.

Design Method of Prototype Filter in Dual Prototype fbmc-oqam System

A prototype filter and design method technology, applied in transmission systems, multi-carrier systems, multi-frequency code systems, etc., can solve the problems of poor overall performance and low degree of design freedom.

Active Publication Date: 2020-06-19
GUILIN UNIV OF ELECTRONIC TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] What the present invention is to solve is the problem that the degree of freedom of prototype filter design is not high and the overall performance is not good in the existing FBMC-OQAM system, and a kind of design method of the prototype filter in the double prototype FBMC-OQAM system is provided

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
  • Design Method of Prototype Filter in Dual Prototype fbmc-oqam System
  • Design Method of Prototype Filter in Dual Prototype fbmc-oqam System
  • Design Method of Prototype Filter in Dual Prototype fbmc-oqam System

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0125] Consider the FBMC-OQAM system with channel number N=256, and design the prototype filters whose lengths are L=3N-1 and L=4N-1. Firstly, in the traditional FBMC-OQAM system, the frequency sampling method, optimized frequency sampling method, window function method, algorithm and single prototype iterative algorithm are used to design respectively. Iterative Design Algorithm of Prototype Filters "The parameter setting of single prototype iterative algorithm design is: η=1×10 -5 , α=0.1. Then in double prototype FBMC-OQAM system, utilize the inventive method to design, relevant parameter is set to: δ=1 * 10 -3 , α=0.1. In the case of L=3N-1 and L=4N-1, the number of iterations of the method of the present invention is 6 and 1 respectively, and the CPU running time is 9.8296s and 4.1123s respectively. Table 1 shows the performance indicators of all the design algorithms in this example. image 3 It is the magnitude response comparison chart of the prototype filter and t...

example 2

[0131] Consider designing large-scale channel FBMC-OQAM system, utilize frequency sampling method, single prototype method and the method of the present invention to design respectively, relevant parameter is set to: subcarrier channel number N=1024, the length of prototype filter is L=3N-1 , α=0.1. Figure 5For example 2 of the present invention, the amplitude response of the prototype filter designed by the method of the present invention and the frequency sampling method; wherein (a) is a comparison chart of the amplitude response of h obtained by the frequency sampling method and h obtained by the design of the present invention, and (b) is Comparison diagram of amplitude response of h obtained by frequency sampling method design and g obtained by design of the present invention. Table 2 shows the FBMC-OQAM system performance obtained by each method design, and it can be obtained that the overall level of the stopband attenuation of the prototype filter obtained by the met...

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 design method of a prototype filter in a double-prototype FBMC-OQAM system, firstly, for a modulation structure considered in the method provided by the invention, differentprototype filters are used for a receiving end and a transmitting end of the modulation structure, and degree of freedom of design of the modulation structure is twice of a conventional FBMC-OQAM modulation structure. Follow-up emulations verify that the structure has better overall performance. Secondly, in the method provided by the invention, a problem of design of the prototype filter is ascribed to an unconstrained optimization problem, and a double-iteration mechanism is used for solving the problem. Moreover, an equivalent condition of matrix inversion and a Toeplitz matrix inversion fast method are used in each step of iteration. Compared with the prior art, the method provided by the invention not only has better performance, but also has very low solving complexity.

Description

technical field [0001] The invention relates to the technical field of prototype filter design, in particular to a design method for a prototype filter in a dual-prototype FBMC-OQAM system. Background technique [0002] In the FBMC technology, the transmitting end realizes multi-carrier modulation by synthesizing filter banks, and the receiving end realizes multi-carrier demodulation by analyzing filter banks. The synthesis filter bank and the analysis filter bank are composed of a group of parallel member filters, and each member filter is obtained by carrier modulation of the prototype filter. FBMC system design includes the following key technologies: prototype filter design, polyphase filter bank principle and modulation method. Among them, the design of the prototype filter is the core of the FBMC implementation, and its performance will directly determine the performance of the entire system, such as stop-band attenuation, inter-symbol interference and inter-subcarrie...

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): H04L27/26H04L27/34
CPCH04L27/264H04L27/3494
Inventor 蒋俊正杨玉琳周芳欧阳缮谢跃雷孙希延刘庆华赵海兵杨杰杨圣
Owner GUILIN UNIV OF ELECTRONIC TECH