FPGA has powerful parallel capabilities and flexible implementation methods. The purpose of this paper is to implement a software filtering algorithm based on the FPGA hardware platform.

Apr 8, 2017 · A first order lowpass filter is usually implemented like this: $$p[n] = \alpha p[n-1] + (1-\alpha) pi[n]$$ Where $p[n]$ is your filtered power estimation, $p[n-1]$ is the previous result, $pi[n]$ is your new measurement (probably the product of instantaneous voltage and current measurements), and $\alpha$ is a positive parameter just less than 1.

Apr 17, 2021 · The FPGA-based software filtering algorithm provides a higher level of parallel processing than the software algorithm. Meet real-time software processing requirements and have flexible hardware programming functions.

May 25, 2006 · The first-order recursive filter, or “leaky integrator,” is a simple yet powerful filter that is a time-tested approach for many filtering applications, and this implementation requires no multiply instructions.

Dec 4, 2008 · Fortunately, you can reduce or remove this noise with one of two different types of software filters. Every sample from an ADC is a combination of signal (S) and noise (N).

Nov 10, 2014 · I noticed that the formula for a low pass filter is VERY similar for an Exponential Moving Average (EMA). Here is a comparison of both formulas: SmoothData = SmoothData_prior – (LPF_Beta * (SmoothData_prior – RawData) EMA = EMA_prior + (Smoothing_Factor * (RawData – EMA_prior)

Oct 6, 2020 · Low-pass filter is a filter that only allows low-frequency components in the signal to pass. We can use it to remove spikes in the curve, erase high-frequency component to blur images, and denoising in the audio.

Oct 5, 2008 · Filtering describes the act of processing data in a way that applies different levels of attenuation to different frequencies within the data. A high pass filter will apply minimal attentuation (ie. leave levels unchanged) for high frequencies, but applies maximum attenuation to low frequencies.

The filtering software which use the software to identify useful signals and interference signals can filter out the interference signal. Following we will list some common methods of software filtering method and briefly introduce the advantages and disadvantages.

Apr 16, 2003 · EWMA filter is exactly similar to low-pass filter. In other words, the high frequencies are filtered out. Therefore, by setting the parameter a you define your bandwidth. The greater a is (a must be within range 0...1), the lower the bandwidth of the low-pass filter.