Describe the Communication Process.

_{The Communication Process}

What are some of the succession of "sub-processes" & components involved in the Communication Process?

_{The Communication Process}

• Terminal Device 

_{(information source)}

• Transmission of signals

• Reception of signals

• Terminal device @ the other end

_{(information sink/use)}

What is the purpose of the Communication Process?

_{The Communication Process}

To process imperfections → a degradation in received signal quality.

_{(This may affect the correct recovery of the original message).}

What are the main elements of a Communication System?

_{The Communication Process}

What are the three (3) basic elements to any Communication System?

_{The Communication Process}

• Transmitter

• Channel

• Receiver

Describe the role of the transmitter.

_{The Communication Process}

• It takes the message signals

• Converts the message signals to symbols that are suitable for the channel.

Describe the role of the channel.

_{The Communication Process}

How may distortion occur due to the transmitted signal propagating along the channel?

_{The Communication Process} 

Distortion can be caused due to...

• channel imperfections 

• noise 

• interfering signals

_{(this can originate from other sources)}

Describe the role of the receiver.

_{The Communication Process}

• It has the task of operating on the received signal

• It reconstructs a recognizable form of the original message signal for a user

What are the two (2) main/basic modes of communication?

_{The Communication Process}

• P2P 

_{(Point-to-Point Communication)}

• Broadcasting

Describe the broadcasting process.

_{The Communication Process}

• This involves the use of a single powerful transmitter & numerous receivers

_{(They are relatively inexpensive to build)}

• Information-bearing signals flow only in one direction 

Describe the P2P (Point-to-Point) communication process.

_{The Communication Process}

• The communication process takes place over a link between a single transmitter & a receiver.

• (Usually) There is a bi-directional flow of information-bearing signals

_{(They require the use of a transmitter & a receiver at each end of the link)}

What are the two (2) primary resources involved in any system?

_{Resources of a Communication Process}

• Channel Bandwidth

• Transmitted Power

Describe the meaning of Channel Bandwidth.

_{Resources of a Communication Process}

Describe the meaning of Transmitted Power.

_{Resources of a Communication Process}

Why are communication channels classified as "Power Limited" or "Band Limited"? 

_{Resources of a Communication Process}

In most communication channels, one resource may be considered more important than the other.

_{(A general system design objective is to use these two (2) resources as efficiently as possible)}

Describe the meaning of Channel Bandwidth.

_{Resources of a Communication Process}

A message transported over a communication system may carry...

• Voice information

• Picture information

• Computer data

• Video information

The basic elements (building blocks) of a communication system are...

• Transmitter

• Receiver

• Channel

• Channel bandwidth

• Signal Power

Because....

• It is still used

• studying these systems motivates our study of some digital systems

• some analog devices & circuits are useful for certain applications

If a signal is strictly band limited, its time domain description will...