Question:
Nyquist Bandwidth
Please reference this figure for the question:
1. Considering only the Nyquist bandwidth limitation. Determine the bandwidth required of the media (at Point D) given the following:
a. 20-analog voice signals digitized using standard G.711 PCM; a TDM multiplexer with an added output overhead of 15%; and a modem that employs QPSK modulation.
b. Repeat part "a" for 16-ary QAM modulation.
c. Repeat part "b" using 16-ary QAM modulation. Each standard G.711 PCM digitized voice signal is compressed using a 4:1 ratio before going into the multiplexer. In addition the multiplexer is inserting a 1-kbps control signal for each input in addition to the general overhead