FSM, i.e., Frequency Sampling Method is another method of designing an FIR Filter. FSM for FIR filter design is perhaps the simplest and most direct technique when a desired frequency response has been specified. It involves uniform sampling of the desired frequency response, and performing an inverse DFT to obtain the corresponding FIR response. The results are not optimal, however, because the response generally deviates from what is desired between the samples. When the desired frequency response is undersampled, the resulting impulse response will be time aliased to some extent.
Its the simplest method of filter design because only limited information about the filter is required as an input.
ReplyDeleteAlso, if the desired filter is undersampled, time aliasing of the output may take place.
Deleteeasy to implement
ReplyDeleteYes, and hence it is used in low-end applications.
Deletebest method to FIR filter design
ReplyDeleteYes, when it comes to ease of implementation!
DeleteThe frequency response has to be sampled, which lead to quantization and quantization error
ReplyDeleteAlso, this type of system requires precise input of values for its stable working too.
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ReplyDeleteThank u.There are other blogs as well. check them out.
DeleteEasy to compute as most values in DFT are zero
ReplyDeleteAlso, as desired output is sampled, the whole process becomes easy to implement.
DeleteFSM is used for narrowband.
ReplyDeleteYes, as it makes computations easier
DeleteFSM is computationally faster and hence more widely used
ReplyDeleteYes, however it has designing issues.
DeleteIt uses the sampling of desired frequency
ReplyDeleteFrequency Response, yes!
DeleteIt uses the sampling of desired frequency
ReplyDeleteHardware requirement are less in FSM
ReplyDeleteYes, when used for narrowband signals
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