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Unformatted text preview: | y 2 [ i ]-( | h 1 [ i ] | 2 + | h 2 [ i ] | 2 ) x [ i ] ) 2 2. Using the same procedure as in problem 3(b) from Homework 3, show that the prob-ability of bit error for QPSK with M receive antennas and MRC is given by: 1 2 P [ X ≤ 1 M SNR ] where X is F-distributed(2 M, 1). 3. Show that the output SNR for equal gain combining (signals are phased, but are then equally weighted) is ² ³ M i =1 | h i | ´ 2 M SNR and that the expected output SNR is (1 + ( M-1)( π/ 4)) SNR . 1 4. Write a Matlab script that produces a plot of probability of bit error (for QPSK) vs. SNR for 3 receive antennas, and three diﬀerent combining methods: MRC, equal gain combining, and selection combining. You should generate the plot using Monte Carlo simulation. The SNR in this plot should be the single-antenna average signal-to-noise ratio, and should range from-5 to 15 dB. 2...
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This note was uploaded on 11/21/2011 for the course EE 5505 taught by Professor Jindal,n during the Spring '08 term at Minnesota.
- Spring '08