Multiple choice

Consider a baseband binary PAM receiver shown below. The additive channel noise n(t) is whit with power spectral density SN(f)=N0/2=10-20 W/Hz. The low-pass filter is ideal with unity gain and cutoff frequency 1MHz. Let Yk represent the random variable y(tk). Yk=Nk if transmitted bit bk=0 Yk=a+Nk if transmitted bit bk=1 Where Nk represents the noise sample value. The noise sample has a probability density function, PNk(n)=0.5لe-ل|n| (This has mean zero and variance 2/ل2). Assume transmitted bits to be equiprobable and threshold z is set to a/2=10-6V.

The value of the parameter ل (in V-1) is

  1. 1010

  2. 107
  3. 1.414$\times$10-10
  4. 2$\times$10-20
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

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