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Digital filters with linear phase responses, that is, constant group delay responses are needed in many applications for signal and image processing.
In this paper, a novel method is proposed for designing maximally flat IIR filters with flat group delay responses in the passband.
By cascading second-order allpass filter sections to the IIR filter to be equalized, the technique is able to produce group delay responses that are practically as close to a flat response as desired.
Recursive, causal and non-causal, multidimensional digital filters, with infinite impulse responses and maximally flat magnitude and delay responses in the low-frequency region, are designed to negate correlated clutter and interference in the 'background' and to accumulate power due to dim targets in the 'foreground' of a surveillance sensor.
Range expansion may delay responses to food limitation such as diminished survival and fecundity until new areas can no longer be colonized to provide additional forage [3].
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Left panels show the burst, decay and delay response kernels.
Typical amplitude and group delay response of such filters can be obtained from [3].
and the actual delay response of the designed system is (20).
The group delay response and chromatic dispersions of the MRGTR-based filters are also examined.
This paper presents the theoretical concept of time-varying Chebyshev filters with compensated group delay response.
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