Direct Sequence Code-Division Multiple-Access Local Area Network Model

Name: Direct Sequence Code-Division Multiple-Access Local Area Network Model
Brand: Biblioscholar
SKU: 9781249586463
Price: 98.39 RON
Availability: InStock

Autor: James R Rapallo

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Editura: Biblioscholar

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The United States Air Force relies heavily on computer networks for everyday operations. The medium...

Informații despre carte

Autor

James R Rapallo

Limbă

engleză

Legare

Carte - Carte broșată

Publicat

2012

Pagini

122

EAN

9781249586463

ISBN

9781249586463

Enbook ID

08141932

Editura

Biblioscholar

Greutate

231

Dimensiuni

189 x 246 x 7

Descriere completă

The United States Air Force relies heavily on computer networks for everyday operations. The medium access control (MAC) protocol currently used by most local area networks (LAN) permits a single station to access the network at a time (e.g. CSMA/CD or Ethernet). This limits network throughput to, at most, the maximum transmission rate of a single node with overhead neglected. Significant delays are observed when a LAN is overloaded by multiple users attempting to access the common medium. In CSMA/CD, collisions are detected and the data sent by the nodes involved are delayed and retransmitted at a later time. The retransmission time is determined with a binary exponential back-of algorithm. Code Division Multiple Access (CDMA) is a technique that increases channel capacity by allowing multiple signals to occupy the same bandwidth simultaneously. Each signal is spread through multiplication with a unique pseudo-random code that distinguishes it from all other signals. Upon reception, the signal of interest is despread and separated from other incoming signals by multiplying it with the same exact code. With this technique, it is possible for multiple stations to transmit simultaneously with minimal ill effects.

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Direct Sequence Code-Division Multiple-Access Local Area Network Model

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