Title :
A Novel Time Domain Synchronous Orthogonal Frequency Division Multiple Access Scheme
Author :
Dai, Linglong ; Fu, Jian ; Wang, Jun ; Song, Jian ; Yang, Zhixing
Author_Institution :
Electron. Eng. Dept., Tsinghua Univ., Beijing, China
Abstract :
Time-domain synchronous orthogonal frequency division multiplexing (TDS-OFDM) outperforms cyclic prefixed-OFDM (CP-OFDM) in spectrum efficiency at the expense of higher complexity. Up to now, TDS-OFDM has only been used in unidirectional transmission, such as broadcasting applications. The overwhelming complexity of removing the implicitly superposed interferences between the PN sequences and IDFT information blocks, caused by multiple users, hinders the application of time-domain synchronous orthogonal frequency division multiple access (TDS-OFDMA) in multi-user communication scenarios. To solve this problem, this paper proposes a novel TDS-OFDMA scheme, including joint cyclicity reconstruction and joint channel estimation, utilizing the new "time-space two-dimensional frame structure". Theoretical analysis and computer simulation show that the proposed scheme not only can achieve the purpose of multiple access but also has an even better system performance in mobile environment than the conventional single-user TDS-OFDM system.
Keywords :
OFDM modulation; cyclic reservation multiple access; frequency division multiple access; interference suppression; CP-OFDM; IDFT information blocks; TDS-OFDMA; cyclic prefixed-OFDM; interferences; joint channel estimation; multiuser communication; time domain synchronous orthogonal frequency division multiple access; unidirectional transmission; Application software; Broadcasting; Channel estimation; Computer simulation; Frequency conversion; Interference; OFDM; Performance analysis; System performance; Time domain analysis;
Conference_Titel :
Global Telecommunications Conference, 2009. GLOBECOM 2009. IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-4148-8
DOI :
10.1109/GLOCOM.2009.5426256