Channel Estimation
Channel estimation is the task of estimating the frequency response of the radio channel the transmitted signal travels before reaching the receiver antenna. The impulse response of a time varying radio channel is usually [20] represented as a discrete time FIR filter
Equation 2.66
WLAN applications generally assume that the channel is quasistationary, that is, the channel does not change during the data packet. With this assumption the time dependency in Equation 2.66 can be dropped
Equation 2.67
Then the discrete time frequency ...
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