Determine the power in the carrier and in the sidebands

Assignment Help Electrical Engineering

Reference no: EM13285384

An AM signal is written as
xc(t) = Ac(1+µx(t))cos(2pifct)
where fc is the carrier frequency, Ac is the carrier amplitude, µ is the modulation index, and x(t) is the baseband message signal. We assume
that x(t) has absolute bandwidth W << fc, and that its amplitude has been normalized so that |x(t)| <= 1.
If x(t) is a cosine of amplitude 1 and frequency fm << fc:

• Obtain an expression for the amplitude spectrum X c(f) of the AM signal xc(t).

• Determine the power in the carrier and in the sidebands. Express the powers in units of dBm into a 50 ohm load. (Remember that
the spectrum analyzer input impedance is 50 ohm)
• Determine the ratio of the power in the sidebands to the power in the carrier

Reference no: EM13285384

Questions Cloud

Determine the position velocity and acceleration of particle : The position of a particle moving along an x axis is given by x = 22t2 - 3.0t3, where x is in meters and t is in seconds. Determine the position, velocity, and acceleration of the particle

Explain a structure for the following compound : Provide a structure for the following compound: EI mass spectrum: two molecular ions of about equal intensity at m/z = 180 and 182; IR: 1740 cm-1; 1H NMR: ? 1.30 (3H, t J = 7 Hz); ? 1.80 (3H, d, J = 7 Hz); ? 4.23 (2H, q, J = 7 Hz); ? 4.37 (1H, q, ..

What is the pre-tax cost of debt for the newly-issued bonds : Gamblers marginal tax rate is 35%. What is the pre-tax cost of debt for the newly-issued bonds.

What is the operatng cash flow : Ranny, Inc. has sales of $14,900, costs of $5,800, depreciation expense of $1,300, and interest expense of $780. If the tax rate is 40 percent, what is the operatng cash flow, or OCF?

Determine the power in the carrier and in the sidebands : where fc is the carrier frequency, Ac is the carrier amplitude, µ is the modulation index, and x(t) is the baseband message signal. We assume that x(t) has absolute bandwidth W

For higher profitability and valuation in the financial mark : 1.Assess the nature of the operation of each company. Describe the risks that each company seems to face as it strives for higher profitability and valuation in the financial markets.

Explain the volume of seawater on earth : The volume of seawater on Earth is about 3.3 x 10^8 mi^3. Because it contains salts, mostly sodium chloride, its density is about 1.03 g/mL, a little higher than that of pure water. The concentration of sodium chloride is about 3.5% by mass.c

By what factor will the power used change : A 70-? electrical appliance and a 90-? electrical appliance are plugged into the outlets of a house. By what factor will the power used change

Define the molar concentrations for co and h2 at equilibrium : Suppose that the molar concentrations for CO and H2 at equilibrium are [CO] = 0.05 M and [H2] = 0.08 M. Use the formula Kc[CO][H2]^2 to calculate the concentration of . Express your answer to one decimal place and include the appropriate units.

User Account

All Pages