VLSI implementation of high throughput MIMO OFDM transceiver

Abstract

newline Wireless communication has gained momentum during past one newlineand a half decade with invention of digital cellular system. At the beginning, newlinethe wireless system was developed and focused to enable a voice newlinecommunication for minimum data rate requirement. Today, it has emerged newlinerapidly in the market because of a tremendous growth in demand of wireless newlineservices which includes network mobility, scalability and connectivity to the newlineusers. Thus recent and future generations of wireless communication systems newlineare characterized by variety of application ranging from low rate voice data to newlinevery high rate real time streaming video data. There exists a strong trend of newlineshifting towards all in one service, i.e. one system supporting many of the newlineapplications. The applications include e-mail, web browsing, video newlineconferencing, internet telephony, multimedia video streaming, IP TV etc. Consequently, wireless designers face the task of limited availability of Radio newlineFrequency (RF) spectrum and complex time varying problems in the wireless newlinechannel, such as fading and multipath, as well as meeting the demand for high newlinedata rates along with better Quality of Service (QoS). All these applications newlineimpose different QoS constraints to deliver the service appropriately. Some applications like internet telephony require low delay service newlinewhereas web browsing or file sharing applications can tolerate a certain newlineamount of delay. In the case of IP TV and video conferencing, both high data newlinerate and low delay service are required. The wireless system designers are newlinesmart and developed the system which has satisfied these applications with a newlinequite reasonable error. Orthogonal Frequency Division Multiplexing (OFDM) newlineis a special form of multicarrier technique where all the subcarriers are newlineorthogonal to each other. OFDM promises higher data rate and great newlineresistance to the frequency selective fading at the reasonable cost and newlinecomplexity in implementation.