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(1) A binary PCM signaling uses on-off signaling to transmit symbols 1 and 0 (symbol 1 is represented by a rectangular pulse of amplitude A and duration Tb; symbol 0 is represented by no pulse transmission for period Tb). The additive noise at the receiver input is white and Gaussian with zero mean and PSD of N0/2. Find an expression for the average probability of error with matched filtering assuming symbol 1 and 0 occur with equal probability.
(2) An analog signal was sampled, quantized and encoded into a binary PCM wave. The sampling frequency was 10 kHz and the number of representation levels was 256. The PCM signal streamed over a baseband channel. How many digits are used to represent each sample? What is the bit rate? How long does it take to transmit one sample? What is the minimum required transmission bandwidth?
(3) The combination of the transmitter and channel produces a pulse with its amplitude spectrum defined by G(f)H(f) = e-|f|Tb. Determine the spectrum of the of the ideal receiver filter that would eliminate intersymbol interference. Assume ideal Nyquist channel.
(4) In a single parity-check code, a single parity bit is appended to a block of k message bits (m0, m1, mk-1). This single parity bit, b1, is chosen so that the codeword satisfies the even parity rule: m0 + m1 +.......+ mk-1 + b0 = 0 (mod 2). For k = 3, set up the 2k possible codewords in the code defined by this rule.
Suppose you need an 8-bit counter, and an 8-bit shift register. How would you go about creating these. Could you create them using the counter and shift register you created already.
A three-phase transmission line having a reactance of 120 ohms per phase is connected to a wye-connected load whose resistance is 160 ohms per phase. If the supply volatge is 70kV line-to-line, calculate a) The line-to-neutral voltage per phase.
Consider a circuit consisting of a sinusoidal source vs(t) = cos(t)u(t) volts connected in series to a resistor R and an inductor L and assume that they have been connected for a very long time. (a) Let R=0 and L=1 H. Compute the instantaneous and ..
let x be a random variable that is exponentially distributed with agt0 i.e. fxx aexp-ax for xgt0 and fxx0 for xlt0.
The network is toanalyze each sequence of four binary digits and produce the corresponding 2's complement of the 4 bit sequence. Assume each 4bit sequence is occurring with the least significant bit first. An example that would satisfy the network
Name two processes metrics which would be worsened by poor cleanroom practices in a semiconductor cleanroom. Describe briefly what is meant by each term
Suppose that a voltage given by v(t) = 45 sin(100pt- 70°) is applied to a 9 O resistance. Sketch v(t) to scale versus time (make sure to put the labels on graph). Find the rms value of the voltage.
When using current mirrors as current amplifiers, a dc current source is often included on both the input side and the output side of the current mirror. What is the purpose of these dc current sources
The message waveform uses a root-raised-cosine line code with α=1. The bandpass filter in the receiver front end has a rectangular frequency response with a bandwidth equal to the absolute bandwidth of the received signal.
The schematic shows a scheme for coupling and amplifying ahigh-frequency pulse signal. The circuit utilizes twon-channel MOFETs whose bias details are not shown and a 50 ohmcoaxial cable connecting the drain of Q1 to the source of Q2.
For a given zener diode circuit, find out the input voltage range
Design a 4-bit binary incrementer using HALF-ADDERS as building blocks. The circuits implements A+1=S where A and S are 4-bit binary numbrers. The circuit has 4 inputs A3A2A1A0 and 5 outputs : S3S2S1S0 and overflow C4. Draw the circuit diagram wit..
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