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High Data Rate QAM Transmission
Aaron Coakley and Edward Lee
Advisors: Dr. In Soo Ahn and Dr. Thomas Stewart

The project involves the design and implementation of high data rate multilevel quadrature amplitude modulation (QAM) transmission utilizing the Motorola Digital Signal Processor 56002. Quadrature Amplitude Modulation is used to fit more information into a narrow bandwidth. Four bits were coded into two separate voltage levels and multiplied by a cosine and sine waves respectively. The cosine and sine waves are then summed to be transmitted to a receiver. The receiver manipulates this data to recover the original four bits. The first phase of the project was to simulate the operation of the transmitter and receiver using Matlab. The next phase was to test and implement the theory on a Motorola DSP56002 Evaluation Kit along with a personal computer. The simplex modem would be practically applied using two coded DSP56002 integrated chips as the transmitter and receiver. The paper contains an explanation of QAM theory, an example of the Matlab simulation and results, a look at the preliminary steps to implement the DSP56002 EVM kit to test the theory, and a result of the final transmitter and receiver with coding. 

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