Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2007-12-11
2007-12-11
Gelin, Jean (Department: 2617)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S338000, C370S335000
Reexamination Certificate
active
10840584
ABSTRACT:
A mobile communication system, a transmitter includes a first transmission antenna and a second transmission antenna, and the first and second transmission antennas transmit signals through at least one odd carrier and at least one even carrier. The transmitter determines a first symbol and a second symbol to be used for initial channel estimation of a receiver, encodes the first symbol and the second symbol by a preset transmit diversity scheme for a preset time, and transmits the encoded first and second symbols to the receiver through odd carriers and even carriers of the first transmission antenna and the second transmission antenna. The receiver receives a signal for the preset period, estimates channel frequency responses of odd carriers of the first transmission antenna and channel frequency responses of even carriers of the second transmission antenna, and estimates channel frequency responses of even carriers of the first transmission antenna and channel frequency responses of odd carriers of the second transmission antenna by using the estimated channel frequency responses.
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Weinstein et al., “Data Transmission by Frequency-Division Multiplexing Using the Discrete Fourier Transform”, IEEE Transactions on Communication Technology, vol. COM-19, No. 5, Oct. 1971, pp. 628-634.
Alamouti, “A Simple Transmit Diversity Technique for Wireless Communications”, IEEE Journal on Select Areas in Communications, vol. 16, No. 8, Oct. 1998, pp. 1451-1458.
Ahmed et al., “Asymptotic Performance of Transmit Diversity via OFDM for Multipath Channels”, IEEE Globecom, Nov. 2002, pp. 1-5.
Im Gi-Hong
Kim Yung-soo
Lee Jong-Hyeuk
Park Cheol-Jin
Won Hui-Chul
Doan Phuoc
Gelin Jean
Samsung Electronics Co,. Ltd.
The Farrell Law Firm
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