By viewing the minimum shift keying By viewing the minimum shift keying (MSK) scheme as a finite-state machine, construct the trellis diagram for MSK. (A description of MSK is presented in Chapter.)
Figure shows the frequency-determining network of a voltage Figure shows the frequency-determining network of a voltage-controlled oscillator. Frequency modulation is provided is produced by applying the modulating signal Am sin (2pA?mt) plus a bias Vb to a pair of varactor diodes connected across the parallel combination of a 200-ÂľH inductor and 100-pF capacitor. The capacitor […]
Figure shows the idealized spectrum of a message signal m Figure shows the idealized spectrum of a message signal m (t). The signal is sampled at a rate equal to 1 kHz using flat-top pulses, with each pulse being of unit amplitude and duration 0.1 ms. Determine and sketch the spectrum of the resulting PAMsignal
Binary data are transmitted over a microwave link at the Binary data are transmitted over a microwave link at the rate of 106b/s, and the power spectral density of the noise at the receiver input is 10â10W/Hz. Find the average carrier power required to maintain an average probability of error Pc < 10â4=”” for=””> (a) […]
Figure shows the block diagram of a wideband frequency modulator Figure shows the block diagram of a wideband frequency modulator using the indirect method. This modulator is used to transmit audio signals containing frequencies in the range of 100 Hz to 15 kHz by a crystal-controlled oscillator. A second crystal-controlled oscillator supplies a sinusoidal wave […]
Figure shows the circuit diagram of an envelope detector. It Figure shows the circuit diagram of an envelope detector. It consists simply of a diode and resistor-capacitor (RC) filter. On a positive half-cycle of the input signal, the diode is forward-biased and the capacitor C charges up rapidly to the peak value of the input […]
11. When a bond sells at a premium: (a) The contract rate is above the market rate 11. When a bond sells at a premium: (a) The contract rate is above the market rate (b) The contract rate is equal to the market rate (c) The contract rate is below the market rate (d) It […]
Figure shows the block diagram of a real-time spectrum analyzer Figure shows the block diagram of a real-time spectrum analyzer working on the principle of frequency modulation. The given signal g (t) and a frequency-modulated signal s (t) are applied to a multiplier and the output g (t) s (t) is fed into a filter […]
Calculate the improvement in processing gain of a DPCM system Calculate the improvement in processing gain of a DPCM system using the optimized three-rap linear predictor of Problem 3.32 over that of the optimized two-tap linear predictor of Problem 3.33. For this calculation, use the autocorrelation function values of the input signal specified in Problem […]
Figure shows the block Orthogonal frequency-division multiplexing may be viewed as a generalization of Mary FSK. Validate the rationale of this statement.