  In this paper we consider noisy index coding problem over AWGN channel. We
give an algorithm to map the index coded bits to appropriate sized PSK symbols
such that for the given index code, in general, the receiver with large amount
of side information will gain in probability of error performance compared to
the ones with lesser amount, depending upon the index code used. We call this
the \textbf{PSK side information coding gain}. Also, we show that receivers
with large amount of side information obtain this coding gain in addition to
the bandwidth gain whereas receivers with lesser amount of side information
trade off this coding gain with bandwidth gain. Moreover, in general, the
difference between the best and worst performance among the receivers is shown
to be proportional to the length of the index code employed.
