Unformatted text preview: mponents of .
are , respectively. 1) Find the power spectral densities of , and 2) Determine the power of
3) Find the envelop function and . of .
cos 2 4) Assume Find the envelop function
Find the envelop of . , where A is a constant. . Problem 5
A noise process has a power spectral density given by
10 
,
10 1
0,  10  10 This noise is passed through an ideal bandpass filter with a bandwidth of 2 MHz, centered at 50
MHz.
1) Find the power of the output process . 2) Write the output process in terms of the inphase and quadrature components,
, and find the power in each component.
3) Find the power spectral densities of and . 4) Now assume that the filter is not an ideal filter and is decribed by
   Repeat Questions 1), 2) and 3). 49
0, , 49  51 and Problem 6
In a broadcasting communication system, the transmitter power
attenuation is 80 dB (the attenuation in dB between
computed as 10 / is 40 KW, the channel and the received signal power ), and the noise power spectral density is 10 is W/Hz. The 10 Hz. message signal has a bandwidth 1) Find the predetection signal...
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 Fall '13
 Gong
 Signal Processing, power spectral density, output signaltonoise ratio, Prof. Zhou Wang

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