EC > GATE 2014 SET-1 > Digital Modulation
Let Q(√γ) be the BER of a BPSK system over an AWGN channel with two-sided noise power spectral density N0/2. The parameter γ is a function of bit energy and noise power spectral density. A system with two independent and identical AWGN channels with noise power spectral density N0/2 is shown in the figure.
The BPSK demodulator receives the sum of outputs of both the channels. If the BER of this system is Q(b√γ), then the value of b is _____.
Correct : 1.41
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