ECEN4533 Data Communications
Lecture #6          26 January 2009
Dr. George Scheets
www.okstate.edu/elec-engr/scheets/ecen4533

ECEN4533 Data Communications
Lecture #7          30 January 2009
Dr. George Scheets

Grading

Multiplexing

FDM

TDM

TDMA/
FDMA

StatMux

CDM

CDMA: 3D View

Direct Sequence Spread Spectrum

Slide 12

Slide 13

Receiver Bit Detection

Receiver Bit Detection

Detection (OSI Level 1)

Someone else talking?

Someone else
 talking?

Someone else
 talking?

Two signals active?

Two signals active.

Our Traffic is Still Recovered

Switching: How Long will a
user get to use a channel?

TDM & Circuit Switching

StatMux & Packet Switching

StatMux & Cell Switching

Slide 27

Repeater or Hub

Black Box Performance...

Black Box Performance...

WAN Switch
LAN Switched Hub or Bridge

Black Box Performance...

Black Box Performance...

Slide 34