Question

3) 10 pts: Four telemetry signals m(t), mz(t), mz(t), m4(t) having bandwidth of 1400, 700, 350, and 350 Hz, respectively, are to be sampled, PAM multiplexed and quantized at L=1024 levels and sent over a single channel as PCM. Show how you will design the PAM multiplexer before the quantizer so that minimum channel bandwidth is used to send the four channels while avoiding aliasing to any signal, and find the value of the minimum channel bandwidth.

Answer 1

تل fm, = 1400 HZ fm2 = 700 HZ fma - 350 HZ fm a 350Hz PAM Multiplexed frecu frecuery fint frosat foret for at frony + from a 2800Hz Levele cQuantized) L = 1024 2=2^ 21020 20=210 n-10 recuired for porn lo bits are stu channel B.w= fs = AN = 2 from fs= fn = 2x2800 fsefu 5600 HZ channel band width ents 1.0 * 5600114 356000 ltz ZHS SS as