What Is a Linear Phase Filter?
A linear phase filter (LPF) is a specialized form of finite impulse response (FIR) filter in signal processing, characterized by a linear phase change across its frequency response.
This filter is meticulously engineered to ensure its impulse response exhibits symmetry, crucial for achieving linear phase alterations in the frequency domain, thereby preserving the signal’s integrity with minimal distortion. LPFs are integral to various sectors, including audio systems, communications, image processing, medical diagnostics, and precision measuring instruments.
The design of LPFs hinges on FIR filter techniques, notably through the application of a window function to shape the impulse response. The hallmark features of an LPF include its ability to maintain signal fidelity, superior frequency response, rapid processing capabilities, and straightforward design process.