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In a CDMA system, user A transmits using the Walsh code (-1 1 -1 1 -1 1 -1 1) and user B transmits using the Walsh code (-1 -1 11 -1 -1 1 1), respectively. Show the output at the receiver if A trans
The U.S. Digital Cellular provider uses a TDMA scheme for multiple access. It uses a 48.6 kbps data rate and supports three users per frame. Each user occupies two of the six time slots per frame. C
A cellular operator using the FDMA technique is allocated a total spectrum of 25 MHz. The system has a channel bandwidth of 60 kHz. It also uses a guard band of 20 kHz. Compute the number of channel
An MFSK modulation scheme with M = 4has a carrier frequency of 250 kHz, a difference frequency of 25 kHz, and two bits per signal element. Make a frequency assignment for each of the possible data c
Consider a regenerative Rankine cycle with a 600_C and 4-MPa throttle, a 5-kPa condenser, and an open feedwater heater at 500 kPa. Turbine efficiencies are 85%. Neglect pump work. (a) Draw labeled,
Calculate the minimum number of PN bits required for each frequency hop for an FHSS system that employs a total bandwidth of 800 MHz and an individual channel bandwidth of 200 Hz.
If the data stream is transmitted using a bandwidth of 64 kHz in an ordinary system (without spread spectrum), what is the SNR that could be tolerated without experiencing significant errors
The output of an exclusive-NOR function is false only if exactly one of the inputs is true. Show the truth table of a two-input exclusive-NOR function, and implement it using AND gates, OR gates and
An amplifier represented with an input resistance of 10k ohm, an output resistance of 1k ohm, and the open circuit voltage gain of 1000 V/V is connected to a signal source of 10 mV peak amplitude wi
An iron ring with a 50-cm mean diameter has a square cross-section of 4 cm2. It is wound with two coils having 1000 and 400 turns. Calculate (a) the self inductance of each coil, and (b) the mutual
Describe the circuit's response to a 4 Vpp sinusoid. Measure its time constant and describe the circuit's response to a 100 Hz, 10 Vpp square wave centred on 0 V.
A Y-connected load with an impedance of 12 - j15 per phase is connected to a balanced Delta-connected 208-V, 60-Hz, three-phase, positive phase-sequence supply. Determine (a) the line and phas
Processes P1 and P2 each have a global variable x. Process P1 has threads T1, T3, and T5, while process P2 has threads T2, T4, and T6. The following sequence of assignments is made by various threa
The read arm of a computer disk drive has the transfer function of G(s) = 1000/s^2. Design a digital controller that has a bandwidth of 100 Hz and a phase margin of 50 degrees. Use a sample rate o
A 50V DC source is connected in series with a switch, an 8.2k ohm resistor, and a 0.01 microfarad capacitor. There is no initial charge on the capacitor and the switch is open. Determine both A &am
A temperature sensor is specified to provide 2 mV/°C. When connected to a load resistance of 10 k ohm, the output voltage was measured to change by 10 mV, corresponding to a change in temperatur
Is it possible to produce a large size dynamo which can satisfy the electricity needs of a home. Is is possible to use the electricity produced by the dynamo to run a motor which can operate dynamo.
Why do you think we need both rectangular and polar forms. There still seems to be some confusion about the relationship between R, Xc, OR XI and the phase angle. Take a value for R and a value for
What are the types of motor Which motor is user in Car Engines which is the most efficient motor How much electricity is needed for single rotation of general motor
Three loads 3+4j are connected in delta to a 208-V, three phase line find line current, power factor, real power, reactive power and complex power
A sinusoidal voltage of peak value 169.9 is applied to a load Z=16-j9. a)What is the peak active power delivered to the load b) What is the value of the average active power delivered to the load
An AM transmitter radiates 9 kW of power when the carrier is unmodulated and 10.125 kW when the carrier is sinusoidally modulated. Find the modulation index, percentage of modulation.
An uncharged capacitor and resistor are connected in series with a 12V source and switch. What is the voltage across the capacitor after the switch is closed and the capacitor is fully charged
The treasure map in the figure gives the following directions to the buried treasure: "Start at the old oak tree, walk due north for 530 paces, then due east for 130 paces. Dig." But when you arrive
The core is made of cast steel. Find the MMF required to get an air gap flux of 60,000 lines. The cross sectional area of the center section and air gaps is 4 in^2. The remaining sections have a cro