IEICE Communications Express
Online ISSN : 2187-0136
ISSN-L : 2187-0136
Four time windows averaging channel estimation with real and imaginary TFI pilot signals for OFDM
Yuta IdaChang-Jun AhnTakahiro MatsumotoShinya Matsufuji
Author information
JOURNAL FREE ACCESS

2017 Volume 6 Issue 10 Pages 590-595

Details
Abstract

In orthogonal frequency division multiplexing (OFDM) systems, the pilot signal is inserted to obtain the channel state information (CSI). The time frequency interferometry (TFI) method reduces the number of pilot signals by using the real and null signals and obtains the accurate CSI by averaging the two time windows. On the other hand, many averaging operations are necessary to obtain more accurate CSI. Before now, we have proposed the pilot signal based on the imaginary and null signals. By using these characteristics, in this letter, we propose the real and imaginary TFI pilot signals to obtain the CSI from the four time windows averaging for OFDM systems.

Content from these authors
© 2017 The Institute of Electronics, Information and Communication Engineers
Previous article Next article
feedback
Top