High-Speed Baseband OFDM System Design

• Main Authors: Tzu-Yu Weng, 翁子育
• Other Authors: Huan-Chun Wang
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/34492168540359678455

碩士 === 國立臺灣科技大學 === 電子工程系 === 104 === The thesis is a design of baseband circuits system to enhance the throughput of OFDM. In IEEE 802.11a protocol, it leaves space between each circuit to avoid signal interference issues, which costs FFT five-times more of the symbol time to process OFDM symbol. In order to enhance the throughput, we use 5 stage of the instruction pipeline as our overall structure of the design. The instruction pipeline of FFT can process multiple signals in the same time. We are able to shorten spare time until it reaches zero. The speed of transmitter and receiver are ten times faster than original speed. The Packet format is based on IEEE 802.11 with the insertion of IEEE 802.16 subcarrier and pilot to maximize bandwidth. Time series is adjusted based upon the highest speed that Virtex 6 baseband circuits are able to endure. Hardware is designed accordingly with the original architect of IEEE 802.11 protocol and packet format. Baseband design contains packet length calculation, cyclic redundancy code calculation, time control, short training symbol, long training symbol, and signal frame.