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发帖数: 378 | 1 if flat fading,u can model channel as y_k = a_k*x_k + n_k
a is the fading coefficient.
the covariance function of flat fading process decides
T_coh, the channel coherent time. If T_coh > T_s (symbol period)
it's a slow fading process, otherwise, fast fading.
Usually, T_coh/4/T_s is the frame length if u model
slow fading channel as a block fading model.
T_coh also equals to 1/f_d, f_d is the doppler frequency. |
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