Spread Spectrum in Cellular Technology and WLAN - Essay Example

Spread spectrum technology entails propagating a signal at a specific bandwidth in a frequency domain. This results in a signal with a wider bandwidth, which translates into more reliable and secure communication through a higher signal to noise ratio.Spread spectrum and cellular technologiesWhen it comes to telecommunication systems today, CDMA employs spread-spectrum technology, reaping the benefits of higher spectral range, and more expansion opportunities in the foreseeable future thanks to an extremely large number of unique addresses.

There are four types of spread spectrum techniques:(i) Direct sequence spread spectrum (DS-SS) systems(ii) Frequency-hopping spread spectrum (FH-SS) systems(iii) Time hopping spread spectrum (TH-SS) systems.(iv) Hybrid systemsSpread spectrum and WLANThe main idea behind spread spectrum is to separate a wireless communication into a set of related transmissions, send the messages over a wide range of radio frequencies, then collect and re-combine signals on the receiving side. General benefits of employing spread-spectrum techniques in WLAN are:•Enhanced reliability (wireless interferences are mitigated)•Increased bandwidth (greater range means better utilization and sharing of bandwidth among multiple channels)•Improved security (much more difficult for transmissions to be intercepted)