OFDM, CDMA, spread spectrum, TDMA, cross-correlated and filtered modulation
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United States of America Patent
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Jul 18, 2006
Issued Date -
N/A
app pub date -
Apr 14, 2005
filing date -
Aug 10, 1998
priority date (Note) -
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Abstract
Modulators for switched or switched and combined Orthogonal Frequency Division Multiplexed (OFDM), Code Division Multiple Access (CDMA), Spread Spectrum, Time Division Multiple Access (TDMA), cross-correlated and filtered systems. A first modulation circuit for receiving input OFDM baseband signals and a second modulation circuit for receiving input in-phase and quadrature-phase cross-correlated baseband signals, TDMA signals, spread spectrum signals, CDMA signals or other filtered signals. One of the switched or combined modulated Radio Frequency (RF) signals and the other switched or combined modulated RF signals are provided to one or more selected transmitters.
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