sysc4600-F09-termexam

sysc4600-F09-termexam - CARLETON UNIVERSITY Department of...

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CARLETON UNIVERSITY Department of Systems and Computer Engineering SYSC 4600 Digital Communications Fall 2009 Professor H. Yanikomeroglu 26 October 2009 Full mark: 100 + 10 bonus points – closed-book, one-page aid-sheet allowed – 80 min.s Question 1 (50 pts) – Transmission through a Bandlimited Channel A passband communication system is given below. The transmit filter generates square- root raised-cosine pulses with α =0.5 and baseband bandwidth W MHz (including the excess bandwidth). Modulation with a sinusoidal carrier ( f c = 2000 MHz) is employed since the channel has the shape of an ideal bandpass filter. The receiver includes a matched square-root raised-cosine (SRRC) filter with cutoff frequency W MHz. Assume that the background noise is negligible. (a) (10 pts) Find W , by taking the bandwidth of the channel into account, that will enable ISI-free transmission at the highest possible symbol rate. (b) (10 pts) Find the transmit bit rate if a 16-ary PAM signaling scheme is used.
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sysc4600-F09-termexam - CARLETON UNIVERSITY Department of...

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