Multiplex communications – Communication over free space – Repeater
Reexamination Certificate
2004-06-21
2008-08-26
Nguyen, Duc (Department: 2617)
Multiplex communications
Communication over free space
Repeater
C370S210000, C370S337000, C370S344000, C370S347000, C370S330000
Reexamination Certificate
active
07417964
ABSTRACT:
A transmitter for a mobile communication system based on an OFDM scheme and a method for controlling the same. The transmitter can implement a characteristic of a multiple access scheme based on an OFDM scheme, a characteristic of a CDMA scheme, and a characteristic of a frequency hopping scheme which has very strong resistance to the frequency selective fading. An apparatus for transmitting information bit sequences from a BS (Base Station) transmitter to different users, includes a plurality of channelizers for dividing a single frame of information bit sequences to be transmitted to individual users into a plurality of times according to a given time interval, simultaneously transmitting the information bit sequences to the individual users within the plurality of division times, dividing the information bit sequences, spreading the divided information bit sequences using different Walsh codes, converting the spread information bit sequences into a single sequence associated with the individual users, and outputting the single sequence; and a frequency hopper for dividing the single sequence, distributing the spread information bit sequences over a plurality of bandwidths capable of mapping-processing the spread information bit sequences with sub-carrier frequencies, and preventing each of the bandwidths from overlapping with time-frequency cells given by the given time interval.
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Cho Young-Kwon
Choi Ho-Kyu
Daniel Katz Marcos
Joo Pan-Yuh
Kim Young-Kyun
Cai Wayne
Nguyen Duc
Samsung Electronics Co,. Ltd
The Farrell Law Firm PC
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