‫Now we come to the constant modulus algorithm are the constant modulus equalizer, the constant marvelous
‫equalizer is a blind equalizer.
‫That means that in this equalizer, we do not need to send the training sequence from the transmitter
‫to the receiver.
‫And this equalizer is already available in the Jeonju radio as a block.
‫And this equalizer only works on the signals that have a constant amplitude.
‫For example, when we talk about the PSC signals in the case of PSC, it signals the constellation points
‫are dissembles.
‫Light on the circle.
‫That means that they have constant amplitude, but they have different phases.
‫So for such signals, the constant marvelous algorithm is a very good can you do now this constant modulus
‫algorithm or this constant modulus equalizer except as its input, the number of apps and these steps
‫are actually the taps of the filter that is being used in this equalizer in order to remove the entire
‫symbol interference.
‫Now, how many taps do we need to use in The Equalizer?
‫There is no straightforward answer to this question because this depends upon the educated guess that
‫we need to make.
‫It depends upon the best practices.
‫And it also depends upon the knowledge of the channel.
‫For example, if this is the transmitter and this is the receiver and there are three multi pots between
‫the transmitter and the receiver, then we can say that or channel is a filter that has three taps.
‫Now, if we increase the multi pots in the channel, then we will then all channel is acting as a filter
‫that has more taps.
‫So in order to equalize such channel, we would need an equalizer that has more taps.
‫So increasing the taps in the equalizer increases the capability of the equalizer to remove these inter
‫symbol interference.
‫So more do taps.
‫Better is the ability of the equalizer to remove the ISI.
‫But there is a catch group as we increase the number of apps the overhead due to the computation increases.
‫And so so that means that this is we are in a kind of catch 22 situation.
‫That means that we can order in.
‫We cannot increase the paps too much because this would increase the computational overhead.
‫On the other hand, we cannot decrease the number of apps to such an extent that the entire symbol interference
‫is not efficiently removed.
‫So we adjust this value such there in-between such that there is not much computational overhead.
‫But at the same time, we are able to sufficiently remove the entire symbol interference.