Transmitter and transmission control method used in random...

Details Transmitter and transmission control method used in random... Transmitter and transmission control method used in random...

2006-03-02

2009-10-27

Ha, Dac V (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S146000, C375S366000, C375S368000, C370S468000, C370S480000, C370S509000

Reexamination Certificate

active

07609752

ABSTRACT:
A transmitter comprises a frequency utilization status detector configured to detect the utilization status of an allocated frequency band based on a received signal, a symbol placement determination unit configured to determine placement of pilot symbols based on the detected status of frequency utilization, and a symbol placement unit configured to place the pilot symbols according to the determined symbol placement.

REFERENCES:
patent: 6424678 (2002-07-01), Doberstein et al.
patent: 6487252 (2002-11-01), Kleider et al.
patent: 6904550 (2005-06-01), Sibecas et al.
patent: 7460466 (2008-12-01), Lee et al.
patent: 2003/0214927 (2003-11-01), Atarashi et al.
patent: 2007/0133386 (2007-06-01), Kim et al.
M. Julia Fernandez-Getino Garcia, et al., “DFT-based Channel Estimation in 2D-Pilot-Symbol-Aided OFDM Wireless Systems”, Proc. of IEEE VTC 2001, 2001, pp. 810-814.

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