2. (4 pts) Line Codes rma A channel has a bandwidth of 3 kHz. Assuming that we t

Question

2. (4 pts) Line Codes rma A channel has a bandwidth of 3 kHz. Assuming that we transmit binary digits over this channel, calculate the data rate (in bits per second) that can be supported using: (a) (2 pts) Polar NRZ with rectangular pulses (b) (2 pts) Bipolar RZ with rectangular pulses Hint: Use PSD expressions for line codes derived in lecture 27 to determine bandwidth (consider first-null) using which you can immediately determine the data rates. Please refer to slide 25 of lecture 27 for useful illustrations of the first-null bandwidth.

Explanation / Answer

(a)

For unipolar NRZ, the data rate is,

Data rate=2×B=2×3000=6000 bps (or) 6 kbps.

(b)

For bipolar RZ, the data rate is,

Data rate=B=3000 bps (or) 3 kbps

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