By Topic

OFDM channel estimation Algorithm based on Frequency-Selective and Time-Varying Channels

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Tang Yan-bo ; Electronics and Information Engineering, Tongji University, Shanghai, China. ; Ge Wan-cheng

Channel estimation based on comb-type pilot pattern has a good performance in frequency-selective channels with the help of MMSE algorithm. But MMSE is too complex for practical implementation and its performance deteriorates rapidly in time-varying channels due to extremely Doppler effects. In this paper, we present an optimized Kalman filter algorithm, which performs iteration operations within separate symbols. Optimized pilot matrices have been posted, where pilots in the special sub-carrier were inserted into rectangle pilot matrices. The modified Kalman filter estimation in the special sub-carrier refines estimation in other pilot sub-carriers. We also propose a low-pass-filter interpolation and FFT transform in time domain and frequency domain respectively. This three-step solution offers a better performance than that of MMSE algorithm. Compared with conventional Kalman estimator the proposed estimator has higher spectral efficiency, while its performance is comparable.

Published in:

Knowledge Acquisition and Modeling Workshop, 2008. KAM Workshop 2008. IEEE International Symposium on

Date of Conference:

21-22 Dec. 2008