Abstracto

VLSI Implementation of WiMAX Channel without Using Floor Function

Mamatha T Chinchali , Maltesh Bajantri

The Worldwide Interoperability for Microwave Access (WiMAX) is currently one of the hottest technologies in wireless. The Institute of Electrical and Electronics Engineers (IEEE) 802 committee, which sets networking standards such as Ethernet (802.3) and WiFi (802.11), has published a set of standards that define WiMAX. IEEE 802.16-2004. These operate in the 2.5GHz, 3.5GHz and 5.8 GHz frequency bands. WiMAX, is based on an RF technology called Orthogonal Frequency Division Multiplexing (OFDM), which is a very effective means of transferring data when carriers of width of 5MHz or greater can be used. WiMAX is a standard-based wireless technology that provides high throughput broadband connections over long distance. WiMAX can be used for a number of applications, including â??last mileâ?? broadband connections, hotspots and high-speed connectivity for business customers. This work proposes an algorithm on address generation circuitry of Deinterleaver using QPSK and 16 QAM modulations for WiMAX transceiver. The floor function associated with the implementation of FPGA is very difficult in IEEE 802.16e standard. The requirement of floor function can be eliminated by using a simple mathematical algorithm. The main aim of the work is to concentrate on performance improvement by reducing interconnection delay, lesser power consumption, and efficient resource utilization by comparing with prevailing technique. This work focuses on removing the complexities and excess hardware involvement in the implementation of the permutations involved in Deinterleaver designs as defined by IEEE 802.16.