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General Category => General Discussion => Topic started by: hibiskusi on October 15, 2016, 19:11:59 PM

Title: Some URGNET Questions
Post by: hibiskusi on October 15, 2016, 19:11:59 PM
hi folks,

Please if you can help me with the following question.

Bipolar line code
The advantage of a bipolar line code is that a bipolar fault (two successive positive or negative pulses, separated by any number of zeros) signals a transmission error to the receiver. Unfortunately, the receiver does not know where this error happened.
The receiver had received the defective sequence. Construct two scenarios (each with a wrongly transmitted signal) that produce the same sequence.

The human hearing range is approximately between 20 Hz and 20 kHz. How big must the sampling frequency of music CDs be at least, so that every piece of music can be reconstructed perfectly?

Conduct an expression for the baud rate D as a function of a bit rate R for 16QAM using Manchester encoding! Use the maximum number of possible signal changes in Manchester.
Monitoring security of multiplexing
Accept an unencrypted radio transmission. Which of the three multiplexing methods (time, frequency and / or code multiplexing) offers the highest monitoring security (0.75P)? Why (0.75P)?