Spread Spectrum Communications: Advantages
And Applications Of Spread Spectrum Communications
3. Advantages and Applications Spread
The SS Communications are widely used today for Military,
Industrial, Avionics, Scientific, and Civil uses. The applications
include the following:
- Jam-resistant communication systems
- CDMA radios: It is useful in multiple access communications
wherein many users communicate over a shared channel.
Here the assignment of a unique spread spectrum sequence
to each user allows him to simultaneouly transmit over
a common channel with minimal mutual interference. Such
access technique often simplifies the network control
- High Resolution Ranging: SS Communications is often
used in high resolution ranging. It is possible to locate
an object with good accuracy using SS techniques. One
example where it could be used is Global Positioning
System (GPS). Here an object can use signals from
several satellites transmitting SS signals according
to a predefined format to determine its own position
accurately on the globe.
- WLAN: Wireless LAN (Local Area Networks) widely
use spread spectrum communications. IEEE 802.11 is a
standard that is developed for mobile communication,
and widely implemented throughout the world. The standard
defines three types of Physical Layer communications.
- Infrared (IR) Communications
- Direct Sequence Spread Spectrum Communications
- Frequency Hopping Spread Spectrum Communications.