[20 points] Two signals m(t) and m-(t), both band-limited to 5000 Hz, are to be transmitted simultaneously over a channel by the multiplexing scheme shown in the following figure. The signal at point b is the multiplexed signal, which now modulates a carrier of frequency 20,000 Hz. The modulated signal at point c is transmitted over a channel
1) [5 points] Sketch signal spectra at points a, b, and c.
2) [10 points] Design a receiver to recover signals ma(t) and ma(t) from the modulated signal at point e. Draw a block diagram and s 1) 2) aw a block diagram and sketch spectra showing the received signal at the receiver you designed can be successfully demodulated
3) [5 points] Is this scheme similar to FDM (Frequency Division Multiplexing), TDM (Time Division Multiplexing), or CDM (Code Division Multiplexing)?
