All RF Cafe quizzes would make perfect fodder for employment interviews for technicians or engineers - particularly those who are fresh out
of school or are relatively new to the work world. Come to think of it, they would make equally excellent study material for the same persons
who are going to be interviewed for a job.
Some of these books used in quizzes are available as prizes in the monthly
RF Cafe Giveaway.
Note: Many answers contain passages quoted in whole or in part from the text.
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quiz is based on the information presented in OFDMA System Analysis and Design, by Samuel C. Young. Published by
Artech House. Note: Some of these books are available as prizes in the
RF Cafe Giveaway
Which of these are advantages of Frequency Division Multiplexing (FDM)?
the above (see page 5)2.
Which transmission scheme has the highest spectral
c) Orthogonal Frequency Division Multiplexing (OFDMA) (see page 13... I made up answer d)
In multi-path signal computations, what is the "plane-earth" model?
a) A model used for
airborne system calculations
b) A model that considers the earth surface to be flat
c) c) A model that
neglects obstacles, i.e., "plane"
d) All the above
b) A model that considers the earth surface to be flat (see page 20)4.
are "linear block codes" in channel coding lingo?
a) A class of codes used for error detection or
correction (see page 47)5.
How does a high peak-to-average power ratio (PAPR)
affect OFDM systems?
c) Significantly (see page 93)6.
What is the
"physical layer" of a protocol?
a) It is the code (software/firmware) responsible for the actual
of bits across the medium (see page 97)7.
What is "receive
d) Dynamically selecting the best signal from multiple antennas (see page 122)
Which of the following are real names given to scheduling algorithms?
d) All the above (see
During a cell scanning interval, which neighboring station
"association level" refers to
Network-Assisted Association Reporting?
c) Association Level 2 (see
What is a cryptographic "hash?"
b) A function that returns
a fixed-size bit string from a variably-sized input string (see page 216)