When a communication system sends multiple bits at the same

When a communication system sends multiple bits at the same time, it is called: Serial transmission Complex transmission Parallel transmission Answer:______Which of the following is not a common cause of degraded performance in a communication system? Interference Weak signals Bandpass filters Noise Answer:______In the cochlea, low frequency sounds result in a maximum response at: The most distant end The closest end to the ear canal About 60% of the way inside About 80% of the way inside Answer:______What term is usually used to describe the situation where a receiver detects not only the intended signal, but also delayed versions of the signal that have reflected off of other objects? Suppose you transmit two identical messages at the same time using two different communication systems. System A uses a parallel binary representation of each character, while system B uses a serial binary representation. If the two systems use tone bursts of equal duration, which system would you expect to transmit your message faster? Explain your answer.

Solution

(6) - option c
Parallel transmission, multiple bits (usually 8 bits or a byte/character) are sent simultaneously on different channels (wires, frequency channels) within the same cable, or radio path, and synchronized to a clock.

(7)- option c
   BandPass filters are used only for filtering the range in communication system but doesn\'t degrade it\'s performance.

(8) - option c
   A consequence of this arrangement is that low frequencies are found in the central core of the cochlear nerve, with high frequencies on the outside.High frequency sounds stimulate the base of the cochlea, whereas low frequency sounds stimulate the apex.

(9) - Carrier Recovery
     

A carrier recovery system is a circuit used to estimate and compensate for frequency and phase differences between a received signal\'s carrier wave and the receiver\'s local oscillator for the purpose of coherent demodulation. Example of QPSK carrier recoveryphase error causing a fixed rotational offset of the received symbolconstellation, X, relative to the intended constellation,Example of QPSK carrier recoveryfrequency error causing rotation of the received symbol constellation, X, relative to the intended constellation,

In the transmitter of a communications carrier system, a carrier wave is modulated by a baseband signal. At the receiver the baseband information is extracted from the incoming modulated waveform.

In an ideal communications system, the carrier signal oscillators of the transmitter and receiver would be perfectly matched in frequency and phase thereby permitting perfect coherent demodulation of the modulated baseband signal.