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In signal processing and electronics, the frequency response of a system is the quantitative measure of the magnitude and phase of the output as a function of input frequency. [1] The frequency response is widely used in the design and analysis of systems, such as audio and control systems , where they simplify mathematical analysis by ...
Equalization was also applied to correct the response of the transducers, for example, a particular microphone might be more sensitive to low frequency sounds than to high frequency sounds, so an equalizer would be used to increase the volume of the higher frequencies (boost), and reduce the volume of the low frequency sounds (cut).
The frequency response of the direct coupled amplifier is similar to low pass filter and hence it is also known as "Low-Pass Amplifier". The amplification of DC (zero frequency) is possible only by this amplifier, hence it later becomes the building block for differential amplifier and operational amplifier. Furthermore, monolithic integrated ...
The zero-forcing equalizer applies the inverse of the channel frequency response to the received signal, to restore the signal after the channel. [1] It has many useful applications. For example, it is studied heavily for IEEE 802.11n (MIMO) where knowing the channel allows recovery of the two or more streams which will be received on top of ...
The bandwidth is defined as = and since the lower cutoff frequency f L is usually several decades lower than the higher cutoff frequency f H, All systems analyzed here have a frequency response which extends to 0 (low-pass systems), thus f L = 0 f H = B W {\displaystyle f_{L}=0\,\Longleftrightarrow \,f_{H}=BW} exactly.
The net frequency response of each channel is the product of the synthesis filter with the frequency response of the filter bank (analysis filter). Ideally, the frequency responses of adjacent channels sum to a constant value at every frequency between the channel centers. That condition is known as perfect reconstruction.