| Summary: | 碩士 === 國立交通大學 === 影像與生醫光電研究所 === 106 === With the rapid development of modem technology. The requirements of transmission are asked better such as signal quality and data rate. In order to cope with huge data transmission, communication system needs to be updated about its technology and application level, including processing complexity , the cost of data reception, latency and data rate.
In Passive Optical Networking the bandwidth are used together for transmission from Optical-Line-Terminal to Optical Network Unit. However, in multi user system receiver needs a high speed sampling rate analog-to-digital converter to receive all data and then a lot of digital signal processing to take out own data so the receive system cost will increase.
Traditional Single-carrier frequency-division multiple access the peak-to-average power ratio increase when number of user increase. When signal has high peak-to-average power ratio, the system may have low power efficiency and need high high-resolution analog-to-digital converter. So it will reduce system performance and increase cost.
Therefore, signal carrier time interleaved frequency-division multiple access for Passive Optical Networking system is proposed. The receiver can replace high speed sampling rate analog-to-digital converter with a low sampling rate analog-to-digital converter and the algorithm can be used to avoid signal aliasing for low sampling rate. Because the transmit signal are pre-processing, the complexity of the digital signal processing at the receiver can be reduced. The problem for Single-carrier frequency-division multiple access multi user have high peak-to-average power ratio can be reduced and solved.
The experiment result, when transmit 32 users and used 500Mb/s sampling rate analog-to-digital converters in each user receiver the Signal carrier time interleaved frequency-division multiple access can transmit 43.63Gbit/s data rate.
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