Apply the BFGS quasi-Newton method to solve minimize f(x) ='Qx – c'x with 5 2 1 2 7 3 and c = 1 39 Initialize the method with xo (0, 0, 0)" and B0 1. Use an exact line search.
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- The transmit power is 20 dB, the transmit antenna gain is 2 (in linear scale), the receiveantenna gain is 3 (in linear scale), the carrier frequency is 300 kHz, the transmit antenna heightis 10 meters, the receive antenna height is 1 meter, the distance between the transmitter andreceiver is 1 km, L = 1. The transmission environment is air (the path loss exponent is 2). Usethe free space propagation model.a. Calculate the receive power in dBm.b. Calculate the path loss in dB.How would you find the needed increase of an antenna area of a satellite if it increased altitude from 600km to 6,000km. This would be an alternative to increasing transmission power. The area of the satellite at 600km is 4m x .70m (2.8m^2). What new antenna area would be needed at 6,000km?Any two transmission mediums (twistted piars, coxial cable, microwave, satalitte, fiber optical).
- Type your question here Let ?⃗ = ? ???∅ ?? + ? ? 2 ???∅ ?? (a) Transform A into rectangular coordinates and calculate its magnitude at p(3, -4, 0). (b) Transform A into spherical system and calculate its magnitude at p( 3, -4, 0).Answer with illustration pls Cellular phone networks use towers to transmit calls to a circular area. On a grid of a province, the coordinates that correspond to the location of the towers and the radius each covers are as follows: Tower 1 is at (-5, -3) and covers a 9 km radius; Tower 2 is at (3,6) and covers a 4 km radius; and Tower 3 is at (12, -3) and covers a 6 km radius.a. What equation represents the transmission boundaries of each tower?b. Which tower transmits calls to phones located at (12,2)?(-6,-7)?(2,8)?(1,3)?c. If you were a cellular phone user, which cellular phone network will you subscribe to? Why?As a technician, you are responsible for the construction of a 10km optical communication link between Pelonomi Hospital and National Hospital in Bloemfontein. The following link specifications are available:Transmitter output power: 15mWCommercially available optical cable length: 2kmOptical cable attenuation: 1.2dB/kmSplice attenuation: 0.1dB/kmLight transmitter-to-cable loss: 1.5dBCable-to-photo detector loss: 1.5dBSafety margin: 7dB Determine the minimum receiver sensitivity in microwatts needed to reliably detect a transmitted signal.
- Four received power measurements were taken at distances of 100 m, 200 m, 1 km, and 3 km from a transmitter. These measured values are given in the following table. It is assumed that the path loss for these measurements follows the model in Equation (4.69.a), where do = 100 m: find the minimum mean square error (MMSE) estimate for the path loss exponent, nA cellular radio transmitter has a power output of 3 W at 800 MHz. It uses an antenna with a gain of 3 dBi. The receiver is 5 km away, with antenna gain of 12 dBi. Ignoring feedline losses and mismatch, calculate (a) the EIRP in dBW (b) the free space path loss, (c) the power delivered to the receiver in W and dBmPlease dont copy from other sources What is the role of Radio frequency in wireless power transfer?Provide a proper block diagram of ultrasonic wireless power transfer for better understanding
- It is desired to construct uniform transmission lines using polyethylene (εr = 2.25) as the dielectric medium. Assuming negligible losses, find the distance of separation (in mm) for a 308 Ω two–wire line, where the radius of the conducting wires is 0.6 (mm).Find the basic path loss for a communication link from Moon to Earth operating at 4000 MHz. The distance between Moon and Earth is 384000 km.A. If Satellite with a radius of 5.3m trans mitted a message at the frequency of 1.3 MHz to earth station. Determine;i. The wavelength, and time, in hour of the transmissionii. The centrifugal force of the satelliteiii. The attenuation of the transmission B. The wavelength of a signal transmitted at 1000MS-1 is 700M. Determine the period of the transmissionC. Analyze the conditions that can lead to satellite path diversityD. Explain handoff and discuss three types of satellite handoff