Abstract
This paper presents design and implementation of 3rd order low pass digital FIR filter using pipelining retiming technique. Aim of this paper is to apply pipelining retiming technique on low pass digital FIR filter and compare with the existing second order retimed FIR filter and third order broadcast, non-broadcast low pass FIR filter. MATLAB FDA tool is used to calculate digital FIR filter coefficients. Hamming and Kaiser window methods are used to find out the coefficients of the FIR filter. Broadcast and non broadcast third order low pass FIR filter architectures are used for pipelining retiming .Cutset and feed forward pipelining retiming techniques are used to retime the third order low pass digital FIR filter. We design our algorithm in VHDL and implemented on Xilinx Vivado xc7a35tcpg261-1. Area (LUT), speed and power are calculated using Xilinx Vivado 2015.2 tool. Synthesis and simulation results are discussed in this paper. Speed and area (LUT) of proposed third order low pass FIR filter is improved in comparison with existing designs.
Highlights
-recursive type filter which impulse response is of finite period.IIR i.e., Infinite Impulse response are recursive filter which impulse response is of infinite period
The impulse response of Finite Impulse Response (FIR) filter is of finite period because it settles to zero in finite time.FIR filter is important as it have the capability of no phase distortion
Speed and area of proposed third order low pass FIR filter is improved in comparison with existing designs
Summary
FIR filters i.e., Finite Impulse Response filters are non. -recursive type filter which impulse response is of finite period.IIR i.e., Infinite Impulse response are recursive filter which impulse response is of infinite period. By non-recursive type filter we mean the filter output sample depends on the present input sample and previous input sample. Recursive type filters reuses one or more of its outputs as an input. The impulse response of FIR filter is of finite period because it settles to zero in finite time.FIR filter is important as it have the capability of no phase distortion. Retiming is a transformation technique used to change the delay elements locations in a circuit without affecting the input/output characteristics of the circuit. In synchronous circuit design, retiming has many applications. Retiming will not affect the input/output characteristics of the circuit by changing the delay elements locations.
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