Acquisition and Tracking

Digital Communications Systems

This set of Digital Communications Multiple Choice Questions & Answers (MCQs) focuses on “Acquisition and Tracking”.

1. Acquisition is a process of bringing two spreading signals into _______ alignment.
a) Fine
b) Coarse
c) Fine & Coarse
d) None of the mentioned

2. Tracking maintains the possible waveform ______ alignment using a feedback loop.
a) Fine
b) Coarse
c) Fine & Coarse
d) None of the mentioned

3. Acquisition can be of ______ type.
a) Coherent
b) Non coherent
c) Coherent & Non coherent
d) None of the mentioned

4. Uncertainty in the distance between transmitter and receiver translates into uncertainty in
a) Frequency
b) Propagation delay
c) Efficiency
d) None of the mentioned

5. Acquisition uses ______ likelihood algorithm for acquiring the code.
a) Minimum
b) Maximum
c) Minimum & Maximum
d) None of the mentioned

6. Acquisition can be accomplished ________ as all possible codes are examined ______
a) Slowly, one by one
b) Rapidly, simultaneously
c) Slowly, simultaneously
d) Rapidly, one by one

7. Matched filter does ______ search.
a) Serial
b) Parallel
c) Serial & Parallel
d) None of the mentioned

8. How many correlators are used for despreading and code tracking function?
a) One
b) Two
c) Three
d) None of the mentioned

9. Which has worse signal to noise performance?
a) Delay locked loop
b) Tau-dither loop
c) Delay locked & Tau-dither loop
d) None of the mentioned

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