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Engineering · Electrical Engineering
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Consider a QPSK modulator based on the following constellation map О 01 11 o aC) o 00 10 o The carrier frequency is fc-2.3 GHz and its amplitude is A-10 mV. The data rate of an incoming binary stream is 1Mbs. a) Assume rectangular pulse shaping. Determine a orthogonal basis signal set. b) Express four QPSK symbols using the basis signal set. c) To send a binary sequence of 110111001010.,map it to QPSK symbols.

Draw a block diagram of a QPSK transmitter. d) Estimate the transmission bandwidth for the rectangular pulse shaped signal waveform. The QPSK signal is reccived by a coherent recciver in the presence of additive white Gaussian noise (AWGN) with single-sided power spectral density No-1010 WHz. Find the bit erro rate (BER) using the approximated Q-function table on the cover page e)

Q-function Table X 0 0.5 1.0V21.6 2 Qx)0.5 0.309 0.1590.0810.0550.0230.00260.0013

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