performance enhancement of tfi-ofdm with path selection based channel identification论文.pdf

Digital Signal Processing 19 (2009) 852–860
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DigitalSignalProcessing

Performance enhancement of TFI-OFDM with path selection based
channel identification
∗
Takeshi Yoshimura , Chang-Jun Ahn, Takeshi Kamio, Hisato Fujisaka, Kazuhisa Haeiwa
Hiroshima City University, 3-5-1 Ohzuka-Higashi, Asa Minami Hiroshima, 731-3194, Japan
article info abstract
Article history: Recently time-frequency interferometry (TFI)-OFDM has been proposed as a channel
Available online 25 March 2009 identification scheme. TFI-OFDM system can multiplex the same impulse response in twice
on the time domain without overlapping each other. In this case, the required pilot signal is
Keywords:
only one. Moreover, by averaging these impulse responses, the accurated channel impulse
OFDM
responses are obtained. However, if the total channel paths are reduced, the performance
CSI
Path selection