| Summary: | 碩士 === 元智大學 === 通訊工程學系 === 92 === With vigorous developments in wireless technology, many signal modulation modes with various standards have elected. In order to integrate various wireless communications system in a single platform, the Software Defined Radio (SDR) technology is arising for this. The SDR provides digital IF sampling, multi-rate signal processing and baseband signal processing for implement wireless communication point to point transmission.
This monograph presents a way how to implement a OFDM transceiver with SDR technique. We choice DSP processor (TI TMS320C5416DSK), FPGA (XILINX VirtexII- XC2V1000), ADC (AD9226-12Bits 64MSPS), and DAC (AD9762B -12Bits 125MSPS) for our major components. The baseband signal adopted OFDM modulation mechanics. Each sub-carrier has orthogonal characteristic, therefore the system decrease interference of every sub-carrier and promote the efficiently of frequency spectrum. Receiver synchronizer applied the short and long training symbol to achieve frequency offset, channel estimation, and applied the cyclic prefix to execute the correlation operation that can reach the synchronized estimation for phase, frequency, and timing.
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