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If the spectrum suddenly changes to have zeroes at 5 kHz, 10 kHz, 15 kHz, etc, what is the new pulse width?
The maximum frequency of the baseband audio signal is 10 KHz and the bandwidth allocated to the FM audio signal is 100 kHz.
How are the left (L) and right (R) signals obtained separately in the radio receiver to drive the dual channel audio amplifier and speakers?
How much additional rain attenuation can occur when the link is using QPSK modulation, compared to 16-QAM?
The signal could have been sent using DSB-LC modulation. What bandwidth would be required to transmit the signal with DSB-LC?
The bit rate on the link needs to be increased to a T1 rate of 1.544 Mbps. What change must be made to the transmitted signal?
A receiver of the CDMA signal has a C/(N+I) ratio of -8.0 dB at its input. What is the CNR at the output of the correlator, assuming ideal operation?
Each burst transmission from each earth station starts with a 176 bit sequence called CBTR. What is the purpose of CBTR?
Improving the floating point ALU to one which cost 4.5 times the original and would treble the performance of the ALU.
If the SNRQ were to be raised to 96 dB, how many bits would the ADC and DAC need? What would be the bit rate on the serial link?
Name two techniques used to compress digital video. Why is compression particularly important for the transmission of digital video signals?
The microwave link in the question above is modified to increase the capacity of the link by adding more channels to increase the transmitted bit rate.
Find the poles and the zeros of X(z) and plot them on the z-plane. Is there a pole or zero at z=1? Explain.
Let x(t) = e^(j*pi*t/4). Find the corresponding system output y(t). Does the eigenfunction property hold? Explain.
Figure shows the response of a first-order filter to a step input. Estimate the half-power cut-off frequency of the filter and sketch its frequency.
Design a bandpass filter of 'Sallen and Key' topology and having the following characteristics fo = 3.3 kHz, Q = 2.2.
A plane metal shield offers an absorption loss of 30 dB at a frequency of 10 kHz to normally incident radiated emission.
Determine the frequency at which two 1 mm thick shields, one made of copper and the other of steel, will have the same shielding effectiveness.
The recording density (bits/inch) of the innermost and outermost tracks if the disk has a 6 inch diameter and the outermost track comes to 1 inch.
Let the disk receive a request to access a random sector on a random track and assume that the head starts at track 0 (the outmost track of the disk).
A 4 pole lap wound armature has 16 coils each with a resistance of 0.1 ohms. Calculate the resistance of the armature.
If the cable tested is 100m in length, Ra1 is 1,5 ohms, Rb1 is 1.0 ohm and Ra2 / Rb2 = 0.8, calculate the distance to the fault.
By working back from the output (or otherwise) to find the equivalent input resistance in order to determine the input voltage.
List and briefly describe the two (2) reasons given in your textbook for why developing software for wireless devices is challenging.
Attenuation is 0 dB from 0 Hz to 2.5 kHz. Phase angle decreases linearly with increasing frequency above 2.5 kHz. Above 5 kHz the filter has steadily increasing