In line-of-sight microwave radio transmission, the signal arrives at the receiver via two propagation paths: the direct path and a delayed path that occurs due to signal reflection from the surrounding terrain. Suppose that the received signal has the form
where s(t) is the transmitted signal, a is the attenuation (a
1. Determine the output of the demodulator at t = T and t = 2T that employs a filter matched to s(t).
2. Determine the probability of error for a symbol-by-symbol detector if the transmitted signal is binary antipodal and the detector ignores the ISL
3. What is the error-rate performance of a simple (one-tap) DFE that estimates a and removes the ISI? Sketch the detector structure that employs a DFE.