Assume that the narrowband noise n (t) is Guassian and Assume that the narrowband noise n (t) is Guassian and its power spectral density SN (A?) is symmetric about the mid band frequency A?c. Show that the in-phase and quadrature components of n (t) are statistically independent.
Consider a square-law detector; using a nonlinear device whose t Consider a square-law detector; using a nonlinear device whose transfer characteristics is defined by v2 (t) = a1v1 (t) + a2v21 (t), where a1 and a2 are constant, v1 (t) is the input, and v2 (t) is the output. The input consists of the AM […]
By using the pre-emphasis filter shown in Figure a and By using the pre-emphasis filter shown in Figure a and with a voice signal as the modulating wave, and FM transmitter produces a signal that is essentially frequency modulated by the lower audio frequencies and phase-modulated by the higher audio frequencies. Explain the reasons for […]
Figure shows a 240-QAM signal constellation, which may be viewed Figure shows a 240-QAM signal constellation, which may be viewed as an extended form of QAM cross constellation. (a) Identify the portion of Figure that is a QAM square constellation,. (b) Build on part (a) to identify the portion of Figure that is a QAM […]
1.) Ultramega Company collected $11,760 in May of 2012 for 4 months of service whic 1.) Ultramega Company collected $11,760 in May of 2012 for 4 months of service which would take place from October of 2012 through January of 2013. The revenue reported from this transaction during 2012 would be (A) $8,820. (B) $0. […]
Figure a show the circuit diagram of a switching modulator. Figure a show the circuit diagram of a switching modulator. Assume that the carrier wave c (t) applied to the diode is large in amplitude, so that the diode acts like an ideal switch: it presents zero impedance when forward biased (i.e. c (t) > […]
Figure displays the waveforms of four signals s1 (t), s2 Figure displays the waveforms of four signals s1 (t), s2 (t), s3 (t) and s4 (t). (a) Using the Gram Figure displays the waveforms of four signals s1 (t), s2 Figure displays the waveforms of four signals s1 (t), s2 (t), s3 (t) and s4 […]
Figure displays the waveforms of four signals s1 (t), s2 Figure displays the waveforms of four signals s1 (t), s2 (t), s3 (t) and s4 (t). (a) Using the Gram-Schmidt orthogonalization procedure, find an orthonormal basis for this set of signals. (b) Construct the corresponding signal-spacediagram.
Figure depicts the variation of the channel capacity of a Figure depicts the variation of the channel capacity of a binary Symmetric channel with the transition probability p. Use the re-suits of problem to explain thisvariation.
Figure depicts the direct (line-of-sight) and indirect (reflecte In wireless communication systems, the carrier frequency on the uplink reverse link) smaller than the carrier frequency on the downlink (forward link), justify the rationale for this choice.