Question

21. Derive the equation for the bit error rate, namely, eq. (3.79), of a coherent ASK system. Use a simple correlator receiver (see Figure P3.21). Note that n(t) is white Gaussian noise with a spec- tral density of N./2.

Answer 1

we know that bit error rate probability of error (pe) is given by Pe= @ Ed ZNO here Eda ( o IS112 - S2(2) 1 at

For ASK- for bita silt)= Accoswet For brzlo salt) = 0 To so Ed= (Accoswet-o) de Jo. To Ed= AC C cos² octdt Jo To Ed= AC Clit Cosawat) dt Tb Ed= AC² | ttshnawet zwe o Eda AC² T Tot sim 20cTb -o-07 20c here wetb=an so . Sin (aroc Tb) = sinuazo so Ed= A (² Tb 2 but value- зь | Re= C | Асть V UNO here To= bit interval Please like my solution..