Title :
A novel adaptive prefix interval scheme for MIMO OFDM systems
Author :
Yan, Kun ; Wu, Hsiao-Chun ; Chang, Shih Yu ; Wu, Yiyan
Author_Institution :
Dept. of Electr. & Comput. Eng., Louisiana State Univ., Baton Rouge, LA, USA
Abstract :
This paper introduces a novel adaptive guard-interval scheme for multiple-input multiple-output (MIMO) orthogonal-frequency-division-multiplexing (OFDM) systems. Conventional OFDM systems set the guard-intervals large enough to combat the inter-symbol interference (ISI). However, such long guard-intervals would often lead to the severe throughput reduction. We design a non-pilot-aided channel-length estimation scheme, which does not require the additional pilot overhead, and propose a new MIMO-OFDM system built on such an adaptive prefix mechanism triggered by the feedback channel length information. Our simulations show that the proposed scheme greatly outperforms the conventional MIMO-OFDM systems.
Keywords :
MIMO communication; OFDM modulation; channel estimation; intersymbol interference; MIMO OFDM systems; adaptive prefix interval scheme; channel-length estimation scheme; feedback channel length information; guard-interval scheme; intersymbol interference; multiple-input multiple-output systems; orthogonal frequency division multiplexing systems; Bit error rate; Delay; Digital video broadcasting; Feedback; Intersymbol interference; MIMO; OFDM; Throughput; Transceivers; Transmitting antennas; MIMO; OFDM; channel length estimation;
Conference_Titel :
Circuits and Systems, 2009. ISCAS 2009. IEEE International Symposium on
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-3827-3
Electronic_ISBN :
978-1-4244-3828-0
DOI :
10.1109/ISCAS.2009.5118383