Abstract
Equalizer is the inverse filter to nullify the effect of Inter-Symbol Interference (ISI), due to dispersive nature of the transmission channel. In the present chapter, the concept, reason and effect of ISI is discussed in the primary sections. Next, the ideal (rect shape) and practical filter response (raised cosine shape), i.e., the impulse response is discussed. The procedure of inverse filtering, i.e., process of equalization comes next. The criterion and variations of linear and adaptive equalizers are discussed. The automatic design parameter (tap gain) adjustment is depicted for time varying practical systems.
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Notes
- 1.
When the time delay \(\tau \) is exactly equal to the symbol interval \(T_B \), the FIR equalizer is called as symbol spaced equalizer.
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Das, A. (2010). Equalization. In: Digital Communication. Signals and Communication Technology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-12743-4_5
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DOI: https://doi.org/10.1007/978-3-642-12743-4_5
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