Wireless communications apparatus and wireless communication...

Multiplex communications – Generalized orthogonal or special mathematical techniques – Particular set of orthogonal functions

Reexamination Certificate

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Reexamination Certificate

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07664011

ABSTRACT:
The invention performs orthogonal frequency division multiplex processing on a transmission signal to form an OFDM modulation signal (daubed in FIG.) and performs orthogonal frequency division multiplex processing and code division multiple access processing on a transmission signal to form an OFDM-CDM modulation signal (shaded in FIG.) to transmit the OFDM modulation signal and the OFDM-CDM modulation signal, which makes it possible to transmit data in a very high rate using the OFDM modulation signal while making it possible to transmit data in a higher quality using the OFDM-CDM modulation signal than using the OFDM-modulation signal, although it is slightly inferior to OFDM modulation in terms of high rate transmission.

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An article by Sawayama, M. et al., entitled “Broadband TD-OFCDM Packet Transmission Using Variable Spreading Factor” published at p. 495 of The Institute of Electronics , Information and Communication Engineers, Tsushin 1, Mar. 7, 2001.
English Language Abstract of JP 2001-203644.
English Language Abstract of JP 2001-217761.
English Language Abstract of JP 05-130082.
English Language Abstract of JP 2001-103032.
English Language Abstract of JP 10-322306.
English Language Abstract of JP 11-313357.
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English language Abstract of JP 11-346203.
English language Abstract of JP 2001-320346.

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