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The 15th Conference on the Wireless across the Taiwan straits (WRTS 2010 E-BOOK)

Kunming,China,9.12-9.17，2010

ISBN: 978-1-935068-21-1 Scientific Research Publishing, USA

E-Book 350pp Pub. Date: September 2010

Category: Computer Science & Communications

Price: $80

Title: Reduction of Out-of-Band Power in WiMAX System by Using Tail-Tracking
Source: The 15th Conference on the Wireless across the Taiwan straits (WRTS 2010 E-BOOK) (pp 157-160)
Author(s): Yun-Sheng Ji, Department of Electrical Engineering Tatung University， Taipei， Taiwan
Chau-Yun Hsu, Department of Electrical Engineering Tatung University， Taipei， Taiwan
Ying Shin Tsai, Department of Electrical Engineering Tatung University， Taipei， Taiwan
Abstract: OFDM is a multicarrier modulation technique for high data rate transmission. It can effectively against frequency selective fading and inter-symbol interference from multipath. Although OFDM technique provides a lot of advantages in transmission, it has a drawback that high out-of-band radiation becomes the interference to adjacent channels. In this thesis, we adopted methods derived from the Symbol Boundary Smoothing (SBS) concept which makes the boundary of transmitted symbols continuous in time domain so that the out-of-band power of signals gets converged in frequency domain. Because we use original null carriers to carry calculated Tail-tracking parameters, this approach will not change the original specification. Using Fixed WiMAX as simulated model, the results show that the proposed method can reduce the out-of-band power in optimization frequency range.
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