Assignment 6

QAM TRANSMITTER

1 .  How would you implement a lookup table in C?(Answer in one word)

2 .  Answer one for an all assembly code.

3 .  Define constellation.

4 . How can we use the Baseband shaping filter coefts designed using the programs provided for shaping a passband signal.

5 . How do 90 degree change in carrier phase affect the o/p constellation.

6 . Use L=12 o/p samples from Inphase and Quadrature passband shaping filters in a symbol rate of 1200bps. What must be the sampling rate of the D/A converter.

7 . Differential encoding increases robustness. (T/F)