Design method for pulse interpolation forming filter

Abstract

The invention discloses the design method of a pulse shaping filter. The method comprises the following steps: initial filter treatment, multiplication treatment, combination treatment, addition buffer window and zero-padding treatment, wherein an input data is respectively multiplied by coefficients generated by the initial filter treatment to obtain results; the results are recombined by the combination treatment; the anterior partial data of the recombined result are inputted to the addition buffer window, the number of the inputted data is equal to the length of the addition buffer window, and the inputted data are respectively added to the present storage value of the window; the addition result is stored and is outputted from the addition buffer window in a sliding manner, and the rest data in the combination treatment are filled in the window at the same time; zero is padded in the last feeding operation; and the addition buffer window outputs the result in the sliding manner until the last data is left. The design method has the advantages of less operation amount, less memory cost, low complexity and improved design efficiency.

Description

technical field [0001] The invention relates to a design method of an interpolation pulse shaping filter based on software radio technology and a window mechanism, and belongs to the technical field of pulse shaping. Background technique [0002] At present, software radio technology is widely used in various aspects of the radio communication field due to its openness and flexibility. Software radio technology regards traditional hardware radio communication equipment as the basic platform of wireless communication, and realizes many communication functions by software. DSP technology is the foundation of software radio. Although low-power DSP and super-function DSP are developing rapidly, the current situation of DSP in speed and power consumption is still the key to restrict the development of software radio. Another research content of DSP is software, which is also the core of software radio technology. In the development of DSP digital signal processing software, the...

AI Technical Summary

Problems solved by technology

In the baseband processing of the digital communication system, the pulse interpolation shaping filter requires a large amount of calculation. If no optimization measures are taken, it is difficult to meet the needs of real-time high-speed calculation.

At present, the design methods to solve this problem are mainly realized by FPGA (Field Programmable Gate Array) using polyphase structure filter or pipeline technology, but its portability and scalability are relatively poor, and some methods can improve the operation speed while , which increases resource consumption

In the method based on DSP, although the polyphase filter reduces the amount of calculation to a certain extent, it does not make full use of the symmetry of the filter coefficients. Some improved algorithms based on traditional algorithms reduce the amount of calculation while reducing the amount of calculation. Additional memory overhead is added, and the real-time performance is not high