On 03/19/2013 05:39 AM, David Rowe wrote: > Hi David, > > Knowing the channel state at a particular time would be very useful. > However it changes so quickly that a training sequence at the start > wouldn't give us real time information. Some modems send continuous > training sequences, and it is also possible to extract real time channel > information from the BPSK pilot and data, such as SNR. Modems which send in packet like bursts embed training in every burst, but I think most continuous transmission schemes now rely on blind equalisation.
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