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Unformatted text preview: P b ( E ) P ( E ) K . (h) Plot R b W vs. E b N for the q-ary ASK system giving P b ( E ) = 10-5 for values of q = 2 , 4 , 8 , 16 , 32. 2. A communication system uses the signal set shown below in order to transmit equiprobable binary messages across an AWGN channel. s ( t ) = s 2 E T cos(2 f t ) , t T s 1 ( t ) = s 2 E T cos(2 f t + 2 h t T ) , t T Assume that f >> 1 and T , h and E are parameters. (a) Draw the block diagram of an optimum receiver. Make sure you specify the function of each block. (b) Evaluate the performance of the system. (Signal to noise ratio needed to get P b ( E ) = 10-5 and the bandwidth requirement.) (c) Assuming that all other parameters are xed, nd the parameter h which minimizes the error probability. (An approximate answer suces here.) 2...
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This note was uploaded on 03/05/2012 for the course EE 7615 taught by Professor Naragipour during the Fall '11 term at LSU.
- Fall '11