下面的话帮忙翻译成英文 200分送上
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发布时间：2023-07-15 16:11
共4个回答
热心网友
时间：2024-12-02 03:31
FIR, IIR is commonly used digital filter. Characteristics of the order number is along with the increase, the filter paper more and more narrow, i.e. rectangular coefficient smaller and smaller. FIR is linear phase, no matter how many order, in the pass-band with signal group delay equal, also, no dispersion, for PSK this kind of signal transmission is particularly important, IIR usually is nonlinear, but now also have allowed linear phase design method for the coefficient of digital filter IIR, the result is that the pass-band with phase fluctuation of maintain a project acceptance range. IIR than FIR the biggest advantage is needed to achieve the same rectangular coefficient the order number of less, often 5 levels of IIR filter can match dozens of hundreds of order of FIR filters. But on the other hand, FIR filter coefficient design method many, the most common is add window, a wide variety of window function can get all kinds of what you need to bandpass characteristics.
Design, Matlab and other professional analysis simulation tools (such as ADS) provide complete coefficient calculation, analysis tools, FPGA design software generally also provide FIR filters IP nuclear, DSP software provides the embedded FIR function, unless you aspire to become a professional algorithm designers, otherwise there is no need to learn how to design a digital filters, just need to learn how to use, in what condition of how to use the filter.
In a practical application system, because the device itself and outside environment of reason, there is always the various interference of doping in the signal noise. Such as audio signal the high frequency component of the noise made music sounds harsh, lost the original has a pleasant sound quality. In order to improve the signal-to-noise ratio of the signal, the signal is filtering, make noise filter out as much as possible. Filtering have analog and digital division, but with the information age and the arrival of the digital world, digital signal processing has become an extremely important today the subject and technology area, it in communication, voice and image, the dynamic control, radar, military, aviation, health care and household appliances and many other fields a wide range of applications. And in digital signal processing applications, the digital filter is very important and has obtained the widespread application.
At present, the realization of digital filter basically has the following kinds of methods:
1) with adder on time-multiplier, delay, the design of special filter circuits;
2) in general computer system with the speeding up of the processor design special implementation;
3) use general programmable D SP chip the implementation;
4) using special DSP chip realized. The chips will corresponding filtering algorithm with hardware implementation within the IC and no programming; 5) based on FPGA/CPLD design and implementation.
In the above several methods, the first kind of method shortcoming is a slow speed, like a can be used in the simulation algorithm D SP; 1, 4 methods specificity is strong, application to much limited by; 3, 5 methods can be programmed to realize all kinds of several word filters, but the third way for to have special instructions to achieve filtering operation and programming of real is easy, and 5 kinds of methods for the programming more difficult.
This paper the method of 3 filter design, written with strong sex the process sequence, born into generation less code, the line efficiency is high, and with TM S320LF 2407 development board to achieve design F IR digital low-pass filter, to prove the practicability and real-time.
希望楼主给分
热心网友
时间：2024-12-02 03:32
热心网友
时间：2024-12-02 03:32
FIR, IIR is commonly used digital filter. Characteristics of the order number is along with the increase, the filter paper more and more narrow, i.e. rectangular coefficient smaller and smaller. FIR is linear phase, no matter how many order, in the pass-band with signal group delay equal, also, no dispersion, for PSK this kind of signal transmission is particularly important, IIR usually is nonlinear, but now also have allowed linear phase design method for the coefficient of digital filter IIR, the result is that the pass-band with phase fluctuation of maintain a project acceptance range. IIR than FIR the biggest advantage is needed to achieve the same rectangular coefficient the order number of less, often 5 levels of IIR filter can match dozens of hundreds of order of FIR filters. But on the other hand, FIR filter coefficient design method many, the most common is add window, a wide variety of window function can get all kinds of what you need to bandpass characteristics.
Design, Matlab and other professional analysis simulation tools (such as ADS) provide complete coefficient calculation, analysis tools, FPGA design software generally also provide FIR filters IP nuclear, DSP software provides the embedded FIR function, unless you aspire to become a professional algorithm designers, otherwise there is no need to learn how to design a digital filters, just need to learn how to use, in what condition of how to use the filter.
In a practical application system, because the device itself and outside environment of reason, there is always the various interference of doping in the signal noise. Such as audio signal the high frequency component of the noise made music sounds harsh, lost the original has a pleasant sound quality. In order to improve the signal-to-noise ratio of the signal, the signal is filtering, make noise filter out as much as possible. Filtering have analog and digital division, but with the information age and the arrival of the digital world, digital signal processing has become an extremely important today the subject and technology area, it in communication, voice and image, the dynamic control, radar, military, aviation, health care and household appliances and many other fields a wide range of applications. And in digital signal processing applications, the digital filter is very important and has obtained the widespread application.
At present, the realization of digital filter basically has the following kinds of methods:
1) with adder on time-multiplier, delay, the design of special filter circuits;
2) in general computer system with the speeding up of the processor design special implementation;
3) use general programmable D SP chip the implementation;
4) using special DSP chip realized. The chips will corresponding filtering algorithm with hardware implementation within the IC and no programming; 5) based on FPGA/CPLD design and implementation.
In the above several methods, the first kind of method shortcoming is a slow speed, like a can be used in the simulation algorithm D SP; 1, 4 methods specificity is strong, application to much limited by; 3, 5 methods can be programmed to realize all kinds of several word filters, but the third way for to have special instructions to achieve filtering operation and programming of real is easy, and 5 kinds of methods for the programming more difficult.
This paper the method of 3 filter design, written with strong sex the process sequence, born into generation less code, the line efficiency is high, and with TM S320LF 2407 development board to achieve design F IR digital low-pass filter, to prove the practicability and real-time.
热心网友
时间：2024-12-02 03:33
