Ten analog measurements whose bandwidth is 4 kHz are to be transmitted simultaneously through a cable by time division multiplexing using PCM. Each message is sampled at a 10 kHz rate and amplitude quantized into 128 levels. The pulses are shaped with a near-ideal low pass filter with a rolloff factor r=0.2 (you will have to do a little reading to understand what this means). At the beginning of each frame (consisting of one word from each of the ten measurements) there is a 7-bit synchronization word.
A)Why is each measurement sampled at a 10 kHz rate?
B)What is the multiplexed pulse rate f_(p_1 ) (information bits only)?
C)What is the baud rate f_b ?
D)What is the required bandwidth of the cable?
3 answers