FPGA IMPLEMENTATION OF USB TRANSCEIVER MACROCELL INTERFACE WITH USB2.0 SPECIFICATIONS

    The Universal Serial Bus(USB) Transceiver Macro cell Interface (UTMI) is a two wire, bi-directional serial bus interface between USB devices.This is one of the important functional blocks of USB controller, which can transmit and receive data to or from USB devices. There are three functional blocks present in USB controller; those are Serial Interface Engine (SIE ), UTMI and Device Specific Logic (DSL). The USB2.0 specifications define three types of UTMI implementations depends on data transmission rates, those are Low Speed (1.5MHz) only (LS), Full Speed (12MHz) only (FS) and High Speed (480MHz)/Full speed (12MHz ) (HS). UTMI consists of Transmitting and Receiving sections, in which the Transmitter of the UTMI sends data to different USB devices through D+ & D- lines whereas the Receiver gets data on the same lines. This project reveals the FPGA implementation of UTMI with HS/FS transmission rate providing with USB 2.0 specifications.

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OPTIMIZED SOFTWARE IMPLEMENTATION OF A FULL-RATE IEEE 802.11A COMPLIANT DIGITAL BASEBAND TRANSMITTER ON A DIGITAL SIGNAL PROCESSOR

     The explosive growth of 802.11-based wireless LANs has attracted interest in providing higher data rates and greater system capacities. Among the IEEE 802.11 standards, the 802.11a standard based on OFDM modulation scheme has been defined to address high - speed and large-system-capacity challenges. Hardware implementations are often used to meet the high-data rate requirements of 802.11a standard. Although software based solutions are more attractive due to the lower cost, shorter development time , and higher flexibility , it is still a challenge to meet the high-data-rate requirements of 802.11a by software. Software - based 802.11a digital baseband transmitter can be designed using Verilog HDL /Matlab.Digital signal processors (DSPs) are a special class of processor optimized for signal-processing applications in communication systems.

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