Howtosignalprocessing
- What is adaptive channel equalizer?
- Why an adaptive equalizer is required?
- What are the modes of adaptive equalizer?
- Which filter is used in adaptive equalizer block diagram?
What is adaptive channel equalizer?
An adaptive equalizer is an equalizer that automatically adapts to time-varying properties of the communication channel. It is frequently used with coherent modulations such as phase-shift keying, mitigating the effects of multipath propagation and Doppler spreading.
Why an adaptive equalizer is required?
Given a channel of unknown impulse response, the purpose of an adaptive equalizer is to operate on the channel output such that the cascade connection of the channel and the equalizer provides an approximation to an ideal transmission medium.
What are the modes of adaptive equalizer?
The examples of these ADAPTIVE EQUALIZERS are zero forcing equalizer, minimum mean square error equalizer, and desicion feedback equalizer.
Which filter is used in adaptive equalizer block diagram?
In the case of a linear communication channel (e.g., a telephone channel used for digital data transmission), the traditional form of an adaptive equalizer consists of a relatively long tapped-delay line filter whose tap-weights are adjusted in accordance with the LMS algorithm (Qureshi, 1985).
