Filterformula for DSP data filtering
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Filterformula for DSP data filtering
The formula inside the FPGA is the standard convention with the signs:
y0 = b0x0 + b1x1 + b2x2 - a1y1 - a2y2
index 0 is the current data (x) and current calculated value (y)
index 1 is the previous data (x) and previously calculated value (y)
index 2 is the data from before the previous data (x) and the data calculated before the previously calculated value (y)
Each filter stage is second order.
There are four filter stages.
Higher order filters can be expressed as a combination of second order filters
y0 = b0x0 + b1x1 + b2x2 - a1y1 - a2y2
index 0 is the current data (x) and current calculated value (y)
index 1 is the previous data (x) and previously calculated value (y)
index 2 is the data from before the previous data (x) and the data calculated before the previously calculated value (y)
Each filter stage is second order.
There are four filter stages.
Higher order filters can be expressed as a combination of second order filters
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» 'Error reading raw data stream electrode raw data. Excluded from conversion'
» AC / DC filtering
» can't see the effect of filtering
» get data from analog 2
» How to analyse my data
» AC / DC filtering
» can't see the effect of filtering
» get data from analog 2
» How to analyse my data
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