| Summary: | 碩士 === 國立交通大學 === 影像與生醫光電研究所 === 107 === As the rapid evolution of technology, the requirement of mass data stream transmission is highly up growing. The communication system will face the issue of improving novel application and technology to respond to the trend. Such as the complexity in the receiver, latency issue and the signal quality.
The approaches to advance the data rate are increasing radio frequency wireless bandwidth and power efficiency. Because traditional radio over fiber multi-user system must receive all of every users’ data then separate their own data by digital signal process, former factor needs the high sampling rate analog-to-digital converter and a large amount of digital signal process, which lead high cost and complexity in receiver. On the other hand, peak-to-average power ratio of traditional single-carrier frequency-division multiple access (SC-FDMA) will increase when serving more users. It results in poor power efficiency and the demand of high resolution analog-to-digital converter.
Therefore, we propose novel algorithm applying to multi-input multi-output (MIMO) SC-FDMA radio over fiber multi-user system, which is single carrier time interleaved frequency division multiple access. By pre-processing technology, there are only low-sampling-rate analog-to-digital converter in receiver to receive the pre-processed signal without aliasing. Furthermore, it doesn’t need additional MIMO demodulation process and complex digital signal process. The algorithm not only can ease the receiver, but also resolve the peak-to-average power ratio issue in traditional SC-FDMA multi-user system.
As a result, up to 50 Gbps in single carrier time interleaved frequency division multiple access with 312.5 MSamples/s analog-to-digital converter and 32 serving users is experimentally demonstrated.
|
|---|
