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URN etd-0826108-132854 Statistics This thesis had been viewed 2886 times. Download 1873 times. Author Ching-ping Huang Author's Email Address No Public. Department Communication Engineering Year 2007 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 51 Title USING THE BOUNDARY-MATCHING METHOD AT CHANNEL ESTIMATION FOR OFDM SYSTEMS Keyword OFDM boundary-matching channel estimation channel estimation boundary-matching OFDM Abstract There are many problems occurred in wireless communications destructing the signals transmitted. Fading is one of the main problems to affect the transmitting signals, hence the fading compensation is the most important problem to be soled especially in high-speed mobile communication.
Pilot symbol-assisted modulation is an effective scheme used to solve fading problems providing good effect to recover the destructed signals to the original ones. This modulation uses the pilots to estimate the fading effect and remove the estimated fading effect and then the signals will be recovered.
The boundary effect by discontinuously of the two ends of the points due to the period extend characteristic of the DFT could reduce the accuracy of the evaluation in pervious research. In this thesis, we discuss the Windowed method and Boundary Matched method to improve the traditional Discrete Fourier transform interpolation in channel estimation. By the simulating results, we can find these two methods can reduce the error of DFT interpolation, and improve the accuracy of channel estimation.
Advisor Committee Chau-yun Hsu - advisor
Jie-cherng Liu - co-chair
Rui-qi Yao - co-chair
Files Date of Defense 2008-07-29 Date of Submission 2008-08-26