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A Direct Sequence Spread Spectrum system receives a 100 Mbps digital signal at its input and transmits a spread signal at 800 Mbps. The received spread signal has an SNR of -3dB.
1. What is the Gain of that system?
2. Write down any chip of your own that satisfies the condition stated above.
3. For the data bit stream 0 0 1 1 0 0 1 0 0 1, what is the corresponding spread bit stream, using your chosen chip above?
5. Consider a 4 channel CDM system with the following CHIPS: A: -1 -1 -1 1 B: -1 -1 1 -1 C: -1 1 -1 -1 D: -1 1 1 1 a) Show that each one of those chips is orthogonal to all of the others. b) If the CDM signal 1 -1 -3 1 is received, by all receivers, what will be the conclusion of each one?
A certain logic family has the following voltage parameters: VIH(min)=3.5V , VIL(max)=1.0V; VOH(min)=4.9V, VOL(max)=0.1V a) What is the largest positive-going noise spike that can be tolerated
Consider a three-phase distribution feeder with line reactance of10 ohm supplying a three-phase Y-connected load of 200 kVA at power factor of 0.85 lagging.
If there are 500 atoms in the sample and assuming that from any state all possible downward transitions are equally probably, what is the total number of photons that will be emitted when all atoms return to the ground state
Assume that your application has 600 data reads for each 4000 instructions. For the same number of instruction the application has 400 data writes. The cache used has an instruction miss rate of 0.6% and a data cache miss rate of 6%.
The fiber has a loss of 0.25 dB/km, and there is a splice with a loss of 0.1 dB every km. The coupling loss at the receiver is 0.5 dB, and the receiver uses an InGaAs APD with a sensitivity of -39 dBm. Find the system margin.
Show that the Hall coefficient for a p-type semiconductor is R_H=1/pe where p is the hole concentration and e is the electron charge. Assume the current is along the +x direction, the magnetic field is along the +z direction, and the Hall electric..
When communicating with a geostationery satellite from earth,the distance between transmitter and receiver is approximately 35000km.assume that the friis law for free space loss is applicable and the stations have parabolic antennas
The simple inexpensive hydro turbo-generator (turbine mated with electric generator) that you intend to buy has a working efficiency of 60%. Answer the following (show your work).
Calculate the Fourier Transform of f(t) = 5 sinc(-2t/100), and graph the magnitude and phase as a function of f. If the signal of problem 1 is delayed by 0.1 ms. What is the new Fourier Transform.
a.) Write signals as the real part of the sum if rotating phasors. b) sum of the counter-rotating phasors c.) Plot the single sided amplitude and phase spectra for this signal d.) plot the double-sided amplitude and phase spectra for this signal.
Two rectangular waveguides, one air filled with internal dimensions 2cm x 1cm and the other dielectric filled with internal dimensions 1cm x 0.5cm, have the same cut-off frequency for the dominant mode. what is The relative permittivity of the die..
Suppose the FCC allocates 300 kHz channels for a high quality video conference service. A service provider decides that this service requires 720 kbps (not including overhead and error control) for each channel.
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