This preview shows page 1. Sign up to view the full content.
Unformatted text preview: s 3 ( t ) = A sin(2 π f c t + 225 ° ) for “00”; s 4 ( t ) = A sin(2 π f c t + 315 ° ) for “01”. Suppose the data sequence “1101100001” is transmitted at a speed of 100,000 bits/sec with a carrier frequency f c = 150 kHz. (i) Plot the transmitted signal with respect to time t . (ii) Express the four symbols as the addition of the in-phase component (a sin function) and the quadrature component (a cos function), and draw a constellation to represent the four symbols. (iii) Based on (ii), show that the QPSK signal in (i) can be expressed by the addition of two BPSK signals. Plot these two BPSK signals....
View Full Document
This note was uploaded on 01/11/2011 for the course EE 3008 taught by Professor Pingli during the Fall '08 term at City University of Hong Kong.
- Fall '08