Variable rate rectangular matched filter

摘要

A variable rate near perfect rectangular matched filter is provided with a low pass filter coupled to the input symbol data stream. The output of the filter is coupled to a sampler and the output of the sampler is coupled to an analog to digital converter to provide digital samples indicative of the data stream at a time occurring between input data symbols. The output of the analog to digital converter is applied to a digital adder which has a filter correction input factor to adjust the output of the digital adder so that the digital samples approximate very closely the output of a perfect rectangular matched filter.