an expression nM() for an AM signal with a carrier frequency of 2 MHz that conveys...
The AM signal supplies 150w of carrier power when it is modulated by a single sine wave to a depth of 70%. Suppose the total transmitted power increases by 10% when another sine wave simultaneously amplitude modulates the carrier. Determine the modulation index of the second index.
Please solve whole this problem and be clear when you write by your hand. 2. An audio frequency signal 10sin2π500t) is used to amplitude modulate a carrier of 50sin(2π 100000t). Assume modulation index-02. Find: a) the general AM equation b) Sketch the spectrum resulting AM [S(] c) Sideband frequencies d) Amplitude of each sideband e) Bandwidth required f) Efficiency of AM wave 2. An audio frequency signal 10sin2π500t) is used to amplitude modulate a carrier of 50sin(2π 100000t). Assume modulation...
1 2 4. The amplitude modulation signal is given by the following expression and is applied to 75 load. Vam(t) = 10 sin (21fct) - 2.5 cos (1500krt) + 2.5 cos (1450krt) V Determine: a) Modulation index b) The frequency of the carrier and the information signal c) The bandwidth d) The total power e) The transmission power efficiency be ar e 5. One of the inputs to a frequency modulator is a 250 kHz carrier signal with amplitude of...
An AM receiver is tuned to broadcast station at 600 kHz. Calculate the image rejection in dB, assuming that the input filter consist of one tuned circuit with a Q of 40? An SSB system transmit a peak envelope power of 100 W into a 75 ohms load. The carrier signal is modulated by two tones, with frequencies 2 kHz and 3 kHz with equal magnitude and only the lower sideband is transmitted with a suppressed carrier. Determine the average...
below is used to modulate a carrier to generate the AM signal yt) (Am()) cos(1000t) The periodic signal m() shown a) The power efficiency of the system is measured to be 1 () The type of AM modulation, i.e. SSB, DSBSC, (i) The constant A. (ili) The modulation index 1/13. Determine DSB with carrier enit -3 b) An angle modulated signal is given by d(t-2 cos (2n1061+ sin 2 1000). Find i) The carrier frequency. ii) The baseband signal bandwidth....
An AM receiver is tuned to broadcast station at 600 kHz. Calculate the image rejection in dB, assuming that the input filter consist of one tuned circuit with a Q of 40? An SSB system transmit a peak envelope power of 100 W into a 75 ohms load. The carrier signal is modulated by two tones, with frequencies 2 kHz and 3 kHz with equal magnitude and only the lower sideband is transmitted with a suppressed carrier. Determine the average...
Consider an AM system. The message signal is given by cos(1000t) volts. The modulated signal is (0.5+acos(1000m))cos(2π.) volts, where α is a positive coefficient, and fe is the carrier frequency. (a) Determine the value of α when the modulation index is 100%. (b) Determine the value of α when the modulation index is 50%. (c) Determine the value of α when the modulation index is 200%. (6 marks) Continue from (1) and suppose α-05. Sketch the spectrum of the transmitted...
Question 4: (20 points) An FM signal is modulated with message m(t)Am cos(2Tmt). The measured amplitude spectrum, SPM(f), is shown below: Amplitude spectrum of the frequency modulated signal 2 -2 5000 4000 3000 2000 -1000 1000 2000 3000 4000 5000 frequency f [Hz] a) What is the carrier frequency fe? b) What is the message frequency fm c) What is the FM modulation index Bf? Is it a narrowband or a wideband signal? d) Using Carson's rule, estimate the transmission...
The following expression describes a carrier modulated by a sinusoidal message. $(t) = [4 + 2 cos (500nt)]cos (500004t) (a) Name the modulation format; (b) Find the carrier frequency in Hz; (c) Find the minimum and maximum frequencies in Hz of the required channel passband; (d) Find the modulation index; (e) Find the power efficiency n
3. The following is the amplitude spectrum of a DSB+carrier AM signal x(f) 1.5 1.5 1.5 1.5 f (Hz) 1920 2000 2080 2080 2000 1920 (a) (10 points) Determine the carrier frequency fe the carrier amplitude Ac the mod ulation index ,, and the message signal m(t) of the AM signal. (b) (10 points) Given that μ2Sm 0.18, find the output SNR (in dB) if the received signal includes white noise with a power spectral density of η/2-10-10 W/Hz. (c)...