Design of FIR Digital Filter Based on CSD Code

A high precision FIR digital filter is achieved based on CSD code. The characteristic of CSD coding is described and the structure of the FIR filter based on time division multiplex is given. FIR filter coefficients is generated by fadtool of MATLAB . The digital filter module is designed by Verilog HDL and simulated under QUARTUS II and MATLAB environment. The results show that the design can improve the accuracy of data acquisition significantly and reduce the use of FPGA resource.

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Design of Reconfigurable FIR Filter System Based on FPGA

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.433-440.4669 ◽

2012 ◽

Vol 433-440 ◽

pp. 4669-4674

Author(s):

Guo Sheng Xu

Keyword(s):

Real Time ◽

Digital Filter ◽

Finite State Machine ◽

Fir Filter ◽

State Machine ◽

Experimental Results ◽

The Real ◽

Filter System ◽

Finite State ◽

Fir Digital Filter

In order to improve the real-time and flexible of FIR digital filter, a reconfigurable FIR filter system based on FPGA is designed. According to the filter specialties, the filter coefficients are calculated by the computer. And the configured coefficients of the multistage FIR filter are downloaded to the chip. The filtering computing is completed by the FPGA. The filtered data is transmitted to the computer through the USB2.0 interface for further processing, such as displaying, analyzing and storing. The states conversion between coefficients configuring mode and filtering mode is finished by FSM (Finite State Machine), which ensures the system to work orderly. The experimental results demonstrated that the coefficients configuring of the system is easy, which can adjust the filter coefficients flexibly according to the actual demand, and the filter is effective，that it can effectively filter out the noise signals.

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Design and Realization of FIR Digital Filter Based on MATLAB

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.490-495.1867 ◽

2012 ◽

Vol 490-495 ◽

pp. 1867-1870 ◽

Cited By ~ 1

Author(s):

Shan Ren ◽

Xin Zhao ◽

Wen Bin Zhang

Keyword(s):

Signal Processing ◽

Digital Signal Processing ◽

Basic Principle ◽

Digital Filter ◽

Digital Signal ◽

Fir Filter ◽

Window Function ◽

Measured Signal ◽

Fir Digital Filter ◽

Filtering Effect

Digital filter is one of the most important parts of digital signal processing. This paper proposes the method of using window function to design FIR filter based on MATLAB, according to the design basic principle of FIR digital filter. Filtering processing for measured signal showed that filtering effect of the filter achieved the expected results.

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Design of High-Precision FIR Filter Based on Verilog HDL

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.433-440.5198 ◽

2012 ◽

Vol 433-440 ◽

pp. 5198-5202

Author(s):

Jun Yuan ◽

Quan Yuan Feng ◽

Dan Wang

Keyword(s):

High Precision ◽

Filter Design ◽

Design Method ◽

Optimization Method ◽

Fir Filter ◽

Parallel Structure ◽

Verilog Hdl ◽

Multi Stage ◽

Effective Performance ◽

Fir Filter Design

This paper presents an optimized FIR filter implementation by using the method of improving coefficient precision at reasonable cost. The comparable results of traditional fix-point implementation and the optimization method show that the high-precision FIR filter design method is universal and easy to implement. Plus the employment of multi-stage pipelining and parallel structure, FIR filter performs higher operating frequency. Let’s take a 32-order lowpass FIR filter as an example, original coefficients are generated on MATLAB, and translated into optimized coefficients according to the optimization method. The functional simulations verify the effective performance, while the synthesis is carried out to analyze the utilization of resources and maximum frequency.

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