Engineering, 25.12.2020 21:50, johndoesnutz4690
A frequency division multiplexing (FDM) system uses SSB-SC subcarrier modulation and FM main-carrier modulation with carrier amplitude A , carrier frequency f and modulation index β. There are K equal-amplitude voice input channels, each band-limited to bandwidth W, with no guard band separating the channels. Assume that the input noise at the receiver has white spectral density, . (a) Determine the bandwidth of the signal at the output of the USSB-SC multiplexer. (b) Determine the transmission bandwidth of the FM system. (c) Determine the noise power at the output of the FM demodulator. (d) Determine the noise power at the output of i-th channel that occupies the frequency band [(i − 1)W, iW]. (e) How should the carrier amplitude A of the i-th channel be chosen to guarantee that, after USSB demodulation, the SNR for all the channels is the same?
Answers: 1
Engineering, 04.07.2019 18:10, abdirahmansoloman
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Apressure vessel with an r/t 20 cannot be treated as thin walled vessel. a)-trune b)- false
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Engineering, 06.07.2019 03:10, netflixacc0107
Consider two concentric spheres forming an enclosure with diameters of 12 cm and 18 cm the spheres are maintained at uniform temperatures ti-50°c and t2 = 250°c and have emissivities .45 and .8, respectively. determine the net rate of radiation heat transfer between the two spheres per unit surface area.
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A frequency division multiplexing (FDM) system uses SSB-SC subcarrier modulation and FM main-carrier...
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