Sensor networks are widely used in the large geographical area and this has to be finding the location of every transmission. The frequencies are considered the major persuasion in sensor networks. Frequency division multiple access (FDMA), time division multiple access (TDMA) and Code division multiple access techniques (CDMA) are used to share the available bandwidth, but these approaches are...

Sensor networks are widely used in the large geographical area and this has to be finding the location of every transmission. The frequencies are considered the major persuasion in sensor networks. Frequency division multiple access (FDMA), time division multiple access (TDMA) and Code division multiple access techniques (CDMA) are used to share the available bandwidth, but these approaches are...

This paper demonstrates the use of some novel cognitive techniques we propose to improve the throughput of a mobile WIMAX network and minimize the packet losses. We propose a novel method called Orthogonal Frequency Division Most Congested Access First (OFDMCAF), to modify the spectrum sharing technique of (Time Division Multiple Access) TDMA and (Orthogonal Frequency Division Multiple Access) ...

A time division multiplexer/demultiplexer for use in an experimental multiple access lightwave network is described. The multiplexer circuit capable of handling data rates up to 100 Mb/sec was built using state of the art emitter coupled logic. This multiplexer is able to absorb a continuous digital data stream at rates between 768 Kb/sec and 100 Mb/sec while at the same time retransmitting the...

Many medium access control protocols have been proposed for optical wavelength division multiplexing local area networks with a star topology. These protocols range from those based on the concept of fixed-assignment of communication subchannels, such as TDMA (Time Division Multiple Access); random-access to communication subchannels, such as DTWDMA (Dynamic Time-Wavelength Division Multiple Ac...

The suitable use of an antenna array at the base station of a communication system results in improved Signal to Interference Ratio (SIR). In this paper, Linear Array (LA), Circular Array (CA) and Concentric Circular Antenna Array (CCAA) are used at the base station of a direct sequence code division multiple access (CDMA) systems. To suppress multiple access interference (MAI), the proposed sc...