Digital filters with impulse response modified by data circulations occurring between successive data inputs专利检索-梳状滤波器线性滤波器信号处理专利检索查询-专利查询网

Digital filters with impulse response modified by data circulations occurring between successive data inputs

阅读：470发布：2022-03-14

专利汇可以提供Digital filters with impulse response modified by data circulations occurring between successive data inputs专利检索，专利查询，专利分析的服务。并且WHERE R BEING THE NUMBER OF INPUT DIGITS THAT CAN BE SIMULTANEOUSLY WEIGHTED, H(IT) being the filter impulse response or coefficient at frequency F. Usually, such filters exhibit a comb type impulse response spectrum of the form

In a digital filter to which is applied a succession of binary coded input signals X(NT), X(NT-T), -X(NT-iT) -X(NT (N-1)T) at a frequency F 1/T, the filter output in the time domain at time NT being related to the input by the approximation，下面是Digital filters with impulse response modified by data circulations occurring between successive data inputs专利的具体信息内容。

权利要求

1. In a digital filter comprising: an r stage shift register; means for applying a succession of binary coded signals X(NT), X(NT-T)-X(NT-iT)-to the register at the rate F 1/T; means responsive to the shift register contents for forming an output signal in the time domain according to the convolution relation

2. In a digital filter according to claim 1 wherein the number of zero amplitudes of the comb type spectrum vary as the ratio (m/n).

3. A digital filter comprising: an r stage shift register; means for applying a succession of binary coded signals to the register at the rate (1/T); an accumulator for algebraically combining binary coded signals; memory means for storing coefficient weighted signals in 2r addressable memory locations; means for extracting from the memory means the contents stored at the location whose address is defined by the r register stages and for applying said extracted contents to the accumulator, said extracting means including means operative during the interval T occurring between successive application of signals to the register for repeatedly extracting from memory and applying the contents thereof to the accumulator at a rate of (n/T) of which m out of n results being retained, m<n<(1/T).

4. A digital filter according to claim 3, wherein the filter exhibits a comb type impulse response spectrum in the frequency domain of the form Y (jw) (sin(mwT/2N))/(sin(wT/2n)) where the number of spectrum zeros varies as m/n.

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