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Build a 1Gbps link as long as possible without regeneration. Assume a transmitter power of 1mW and a receiver sensitivity of -30dBm for a BER of 10^(-9). The dispersion at 1.5 micron is 20 ps/km.nm, and the attenuation is 0.25 dB/km. What would be the maximum length if you choose (1) a wavelength of 1.5 micron and single-mode, GRIN, or step-index multimode fiber or (2) you choose a wavelength of 1.3 micron? Assume that the bandwidth of the transmitted signal is about 1 GHz.
Discuss the following assertions:(a) Dispersion limits the (bit rate) x (length) product(b) Attenuation limits the length(c) Dispersion limits the bit rate(d) If the fiber is single mode, it still has dispersion(e)WDM increases the bit rate by reducing dispersion.
A semiconductor, in thermal equilibrium, has a hole concentration of p0 = 2x1016 cm-3. The minority carrier life time = 3x10-7 s. (Assume, ni = 1010 cm-3) (a) Determine the thermal equilibrium recombination rate of electrons.
A cable TV receiver has an input impedance of 200 ohm The cable TV distribution system uses RG-6 cable. This cable has a characteristic impedance of 75 ohm Design an impedance matching stage to maximize the power transfer
the current through a 1.5 mH inductance is i = 2sin10^(6)t mA. find the voltage v, power p, and stored energy w. Plot them versus 10^(6)t for 0
Consider a digital communication system in which the received symbol y is equal to : y = x+I+n, where n is AWGN with variant sigma_n^2, I models interference independent of both x and n and x is the data taking values +A and -A.
a) Write the system of linear equations in the form of Ax = b: (b) Use Guass-Jordan method to find A inverse (c) Use A inverse to solve the system of equations. -2x1 + x2 +x3 = -12 4x1 + 2x2 + 4x3 = 7 -x1 + x2 + 2x3 = -3
Design combination circuits that generates the -ve of a give 4-bit +v signed number, e.g. if it is +2 the circuit will generate -2 and if it is -2 the circuit will not change it. assuming that the signed number is in 1's complement representation.
1. Choose a sampling rate of Fs = 40 kHz. 2. Create a vector t of 32768 time-sample points spaced according to this Fs, starting at 0 seconds. 3. Compute a vector x of 32768 samples of a 5400 Hz sinusoid with amplitude of square root of 2.
A 450 piece/hr 10 hr B 500 piece/hr 8 hr A set of unsharpen ed tools costs $1,500 and can be ground 15 times. The cost of each grinding is $20. The time required to change and reset the tools is 2 hours, and such changes are made by a tool-setter.
Suppose unchirped Gaussian pulses at f = 1:55 fm are used to transmit binary data. You're given that the fiber dispersion parameter f = 17 ps/km-nm, and the dispersion length LD = 115 km. What is the half-width of the pulse at the origin
Calculate in polar form the sequence components of unbalanced lineto-neutral voltages and calculate in polar form the phase currents corresponding to the sequence components
discuss the difference(s) and similarity(ies) between the modulations index used in AM and the modulation index used in FM What are the practical interpretations
The electric field in a region of space is E= 4 ax V/m and the magnetic flux density is B= 5 az Wb/m2. At t= 0 a particle with mass 1 kg and charge 1 C is located at the origin traveling at a velocity of u0= 10 ay m/s.
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