An example I can think of is let's say there's a
channel estimation block followed by an equalizer block.
Let's say the channel estimator estimates the channel
by looking for a training sequence in the incoming data. Once
it finds the training sequence it needs to transfer the data
into the equalizer which it will through its output port.
But how is the channel vector sent to the equalizer?
Its not going to be a constant stream, it may just be a fixed
vector of so and so number of taps. Is there a way to make the
equalizer see this channel vector?
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