Radio communications apparatus and radio communications method

Details Radio communications apparatus and radio communications method Radio communications apparatus and radio communications method

2002-08-22

2008-09-02

Marcelo, Melvin (Department: 2616)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Plural diverse modulation techniques

C370S208000

Reexamination Certificate

active

07420915

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.
English language Abstract of JP 2001-203665.

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