- 8.8.1: Let x(t) be a signal for which X(jw) = 0 when lwl > WM. Another sig...
- 8.8.2: Let x(t) be a real-valued signal for which X(jw) = 0 when lwl > 1,0...
- 8.8.3: Let x(t) be a real-valued signal for which X(jw) = 0 when lwl > 2,0...
- 8.8.4: Suppose x(t) = sin 2007Tt + 2 sin 4007Tt and g(t) = x(t) sin 4007Tt...
- 8.8.5: Suppose we wish to transmit the signal ( ) sin 1,0007Tt xt = 7Tt us...
- 8.8.6: Assume that x(t) is a signal whose Fourier transform X(jw) is zero ...
- 8.8.7: An AM-SSB/SC system is applied to a signal x(t) whose Fourier trans...
- 8.8.8: Consider the modulation system shown in Figure P8.8. The input sign...
- 8.8.9: Two signals x1 (t) and x2(t), each with a Fourier transform that is...
- 8.8.11: Let X c(t) = L akejkw,r, k=-X where a0 = 0 and a 1 =rf 0, be a real...
- 8.8.12: Consider a set of 10 signals xi(t), i = 1, 2, 3, ... , 10. Assume t...
- 8.8.13: A class of popularly used pulses in PAM are those which have a rais...
- 8.8.14: Consider the frequency-modulated signal y(t) = cos( wet + m cos Wmt...
- 8.8.15: For what values of w 0 in the range -7r < w 0 ::::; 7T is amplitude...
- 8.8.16: Suppose x[n] is a real-valued discrete-time signal whose Fourier tr...
- 8.8.17: Consider an arbitrary finite-duration signal x[n] with Fourier tran...
- 8.8.18: Let x[n] be a real-valued discrete-time signal whose Fourier transf...
- 8.8.19: Consider 10 arbitrary real-valued signals Xi[n], i = 1, 2, ... , 10...
- 8.8.21: In Sections 8.1 and 8.2, we analyzed the sinusoidal amplitude modul...
- 8.8.22: In Figure P8.22(a), a system is shown with input signal x(t) and ou...
- 8.8.23: In Section 8.2, we discussed the effect of a loss of synchronizatio...
- 8.8.24: Figure P8.24 shows a system to be used for sinusoidal amplitude mod...
- 8.8.25: A commonly used system to maintain privacy in voice communication i...
- 8.8.26: In Section 8.2.2, we discussed the use of an envelope detector for ...
- 8.8.27: As discussed in Section 8.2.2, asynchronous modulation-demodulation...
- 8.8.28: In Section 8.4 we discussed the implementation of single-sideband m...
- 8.8.29: Single-sideband modulation is commonly used in point-to-point voice...
- 8.8.31: Let x[n] be a discrete-time signal with spectrumX(ejw), and let p(t...
- 8.8.32: Consider a discrete-time signal x[n] with Fourier transform shown i...
- 8.8.33: Let us consider the frequency-division multiplexing of discrete-tim...
- 8.8.34: In discussing amplitude modulation systems, modulation and demodula...
- 8.8.35: The modulation -demodulation scheme proposed in this problem is sim...
- 8.8.36: The accurate demultiplexing-demodulation of radio and television si...
- 8.8.37: The following scheme has been proposed to perform amplitude modulat...
- 8.8.38: In Figure P8.38(a), a communication system is shown that transmits ...
- 8.8.39: Suppose we wish to communicate one of two possible messages: messag...
- 8.8.41: In 8.40, we introduced the concept of quadrature multiplexing, wher...
- 8.8.42: In order to avoid intersymbol interference, pulses used in PAM syst...
- 8.8.43: The impulse response of a channel used for PAM communication is spe...
- 8.8.44: In this problem, we explore an equalization method used to avoid in...
- 8.8.45: A band-limited signal x(t) is to be transmitted using narrowband FM...
- 8.8.46: Consider the complex exponential function of time, s(t) = ei8(t)' (...
- 8.8.47: In Section 8.8 we considered synchronous discrete-time modulation a...
- 8.8.48: In this problem, we consider the analysis of discrete-time amplitud...
- 8.8.49: In practice it is often very difficult to build an amplifier at ver...

# Solutions for Chapter 8: Communication Systems

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Solutions for Chapter 8: Communication Systems

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