导航
ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2009, Vol. 30 ›› Issue (6): 1126-1130.
• Avionics and Autocontrol • Previous Articles Next Articles
Meng Hongtao, Chen Dirong, Liu Hongying
Received:
Revised:
Online:
Published:
Contact:
Abstract: The orthogonal frequency division multiplexing (OFDM) modulation technique is widely used in digital transmission systems because of its good performance in withstanding multi-path disturbances and its efficient use of frequency bandwidths. In this article, an OFDM system based on local trigonometric transform (LTT) is proposed in which the spectral density out of the bandwidths decreases rapidly and the adjacent symbols of OFDM remain orthnormal. The fast algorithm based on discrete cosine transform (DCT) and its complexity are obtained and the selection of the best basis is discussed. Theoretical analysis and computer simulation results show that the biterror and anti-Dopplerfrequencyoffset capability of the proposed method outperform the conventional fast Fourier transform (FFT)based system. It can effectively utilize the frequency resources and greatly improve system performance.
Key words: orthogonal frequency division multiplexing, local trigonometric transform, best basis, spectum analysis, Doppler effect
CLC Number:
TN914.51
Meng Hongtao;Chen Dirong;Liu Hongying. OFDM System Based on Local Trigonometric Transform[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2009, 30(6): 1126-1130.
Add to citation manager EndNote|Reference Manager|ProCite|BibTeX|RefWorks
URL: https://hkxb.buaa.edu.cn/EN/
https://hkxb.buaa.edu.cn/EN/Y2009/V30/I6/1126