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Modular Approach to Channel Equalization
The mobile cellular channel is generally considered to be Linear and Time-Variant (LTV). However, under limiting conditions, it can even be modeled as Linear and Time-Invariant (LTI). This approach is very convenient as it simplifies many problems associated with mobile cellular communication systems design such as equalizer design (which is in effect a system identification problem). In this conventional approach to modeling the mobile cellular channel as LTI or LTV, we assume that the transmitter subsystem, including channel encoder and modulator, is linear. Then only the notion of a linear time-invariant/variant channel holds good. But this is not the case often enough: Transmitter amplifiers ...
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