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(Spatial sampling) Consider a MIMO system with Lt = Lr = 2 in a channel with M = 10 multipaths. The ith multipath makes an angle of iLlcp with the transmit array and an angle of iLlcp with the receive array where Llcp = 1r/M.
1. Assuming there are nt transmit and nr receive antennas, compute the channel matrix.
2. Compute the channel eigenvalues for nt = nr varying from 4 to 8.
3. Describe the distribution of the eigenvalues.
Determine the Voltage across the electrical model of a cell membrane in a nerve cell
i) Identify the PSK type and calculate the bandwidth if the modem is transmitting with 9600bps and 2400 baud. ii) Suggest a way to reduce the baud rate to 1200 baud and calculate the new bandwidth.
What effect do internal capacitances in the transistor model have on practical performance of a real system? How would you use these model values to predict system performance?
DC-DC converter. You have 10 capacitors, each 1F. If you charge them in parallel from a 5V power supply, and then disconnect them and reconnect them in series: a. What is the equivalent capacitance seen by the power supply while charging.
Using many resistors and the DMM, try to determine what digits each colour band represents. Briefly explain your method and your findings in the space below.
Find the longest allowable evaluate time if the decay in output voltage is to be limited to .2V. If the precharge interval is much shorter then the maximum allowable evaluate time, find the minimum clocking frequency required.
a) A silicon wafer is uniformly doped p-type with Na=10^15 cm-3. At T=0K. What are the equilibrium hole and electron consentrations b) A semiconductor is doped with an impurity concentration N such that N>>ni and all the impurities are ionized.
A 138-kV, three-phase short transmission line has a per-phase impedance of (2+j4) ohms. If the line supplies a 25-MW load at 0.8 power factor lagging, calculate (a) the efficiency and (b) the sending-end voltage and power factor.
Design a circuit which provides 20 dB of gain. The 3dB filter points should be 50 HZ and 50 KHZ. Use a bipolar power supply (+/- 9V). Your circuit should be able to provide a minimum of 5 Watts of output power.
When a voltage v(t)=250 sin[314t-(pi/4)] is applied to a circuit,the current in the circuit is found to be i(t)=50 sin[314t-(pi/2)] amperes. Find the circuit elements,power & power factor.
Write a program which accepts the frequency of an electromagnetic wave in megahertz and then displays to the user whether the frequency falls in the FM band, AM band, or neither.\FM radio falls between: 87.7 to 108.0 MHz.
The table in the IS-865 example in the text gives the SINR thresholds for using the various rates. What would the thresholds have been if capacity-achieving codes were used? Are the codes used in IS-856 close to optimal?
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