碩士 / 國立交通大學 / 電子工程系所 / 92 / In this thesis, channel estimation and equalization for the Orthogonal Frequency Division Multiplexing (OFDM) system are investigated. In the first part of the thesis, we compare the performance of different channel interpolation schemes in IEEE 802.16a and DVB-T systems inclusive of linear, Lagrange, cubic spline, cubic Bspline, DFT-based, and DCT-based interpolators. As a result, linear and cubic Bspline interpolators show better bit error rate. Concerning the computational complexity as well as the performance, the linear interpolator is considered as a proper choice for channel estimation. In the second part of this thesis, we investigate the effect of inter-carrier interferences (ICI) caused by fast fading channels and carrier frequency offsets., According to the linear assumption of channel impulse response, we propose an estimation method that can reduce the ICI effect efficiently based on a current channel estimation method.
| Identifer | oai:union.ndltd.org:TW/092NCTU5427129 |
| Date | January 2004 |
| Creators | 吳清泉 |
| Contributors | 陳紹基 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | en_US |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 107 |
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