For HF ionospheric channels ( frequency range 3 up to 30 MHz), I Want to make channel equalization in time domain, using MMSE criterion. I have to do it using the channel estimation.
I have some questions:
- Can some one elaborate more on the closed-form solution solution for the feedforward and feedback FIR filters ?
- And what is the exact relation between the number of taps of the filters and the channel delay spread ?
Any help will be really appreciated