초록 ▼

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

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.

대표청구항 ▼

What is claimed is: 1. A system comprising: a first radio frequency (RF) quadrature modulation circuit for receiving input in-phase and quadrature-phase cross-correlated baseband signals and for providing a first modulated RF signal; a second radio frequency (RF) quadrature modulation circuit for r

What is claimed is: 1. A system comprising: a first radio frequency (RF) quadrature modulation circuit for receiving input in-phase and quadrature-phase cross-correlated baseband signals and for providing a first modulated RF signal; a second radio frequency (RF) quadrature modulation circuit for receiving input Orthogonal Frequency Division Multiplexed (OFDM) in-phase and quadrature-phase baseband signals and for providing a second quadrature modulated RF signal; and a selector for selecting either the first or the second quadrature modulated RF signal or both the first and second quadrature modulated RF signal and providing the selected signal or selected signals to the transmission medium. 2. In a radio frequency (RF) modulator network for receiving baseband signals and transmitting RF modulated signals the improvement comprising two or more RF modulator circuits and a selection circuit, the first modulator is for modulation of cross-correlated baseband signals the second modulator is for modulation of Orthogonal Frequency Division Multiplexed (OFDM) baseband signals; the selection device selects either the first or the second modulated RF signal or both the first and second modulated RF signals and provides the selected signal or the selected signals to the transmission medium. 3. A system comprising: a signal peak limiting circuit for receiving an Orthogonal Frequency Division Multiplexed (OFDM) baseband signal and for providing a peak limited Orthogonal Frequency Division Multiplexed (OFDM) baseband signal; a first modulation circuit for receiving said peak limited OFDM baseband signal and for providing a modulated signal; a baseband filter circuit for receiving baseband signals and for providing filtered baseband signals; a second modulation circuit for receiving said baseband filtered signal and for providing a filtered modulated signal; a network for providing either the OFDM modulated signal or the filtered modulated signal or both the OFDM modulated signal and the filtered modulated signal; and connection for connecting the provided signal or provided signals to the transmission medium. 4. A system comprising: a first modulation circuit for receiving Orthogonal Frequency Division Multiplexed (OFDM) in-phase and quadrature-phase baseband signals and for providing a first quadrature modulated signal; a second modulation circuit for receiving Time Division Multiple Access (TDMA) baseband signals and for providing a second modulated signal; and a circuit connecting of either the first or the second modulated signal or both the first and second modulated signals to the transmitter. 5. A system comprising: a first quadrature modulation circuit for receiving input Code Division Multiple Access (CDMA) in-phase and quadrature-phase baseband signals and for providing a first quadrature modulated signal; a second quadrature modulation circuit for receiving input Orthogonal Frequency Division Multiplexed (OFDM) in-phase and quadrature-phase baseband signals and for providing a second quadrature modulated signal; a selector for selecting either the first or the second or both the first and second quadrature modulated signal and providing the selected signal to one or more amplifiers; and two or more amplifiers for transmitting one or more amplified selected modulated signals. 6. A system comprising: a first baseband circuit for receiving baseband signals and for providing spread spectrum baseband signals; a first modulation circuit for receiving said spread spectrum baseband signals and for providing a first modulated signal; a second baseband circuit for receiving and providing signal peak limited Orthogonal Frequency Division Multiplexed (OFDM) baseband signals; a second modulation circuit for receiving said peak limited Orthogonal Frequency Division Multiplexed (OFDM) baseband signals and for providing a second modulated signal; and a device for selecting either the first or the second modulated signal or both the first and second modulated signals and connecting the selected signal or selected signals to one or more transmitters. 7. A system comprising: a baseband Time Constrained Signal (TCS) waveform processor and Long Response (LR) filter structure for providing Gaussian shaped waveforms and Gaussian filtered signals; a first modulation circuit for receiving said shaped waveforms and filtered signals and for providing a first modulated signal; a second modulation circuit for receiving input Orthogonal Frequency Division Multiplexed (OFDM) in-phase and quadrature-phase baseband signals and for providing a second modulated signal; and a selector for selecting either the first or the second modulated signal or both the first and second modulated signal and providing the selected signal or selected signals to the transmission medium. 8. A system comprising: a first modulation circuit for receiving input Code Division Multiple Access (CDMA) baseband signals and for providing a first modulated signal; a second modulation circuit for receiving input Orthogonal Frequency Division Multiplexed (OFDM) baseband signals and for providing a second modulated signal; a third modulation circuit for receiving filtered input signals and for providing a third modulated signal; a selector for selecting either the first or the second or the third modulated signal or two or more modulated signals and providing the selected signals to one or more amplifiers; and two or more amplifiers for transmitting one or more amplified selected modulated signals. 9. A system comprising: a baseband spread spectrum processor and long response (LR) filter circuit for receiving spread spectrum signals for providing filtered spread spectrum signals; a first modulation circuit for receiving said filtered spread spectrum signals and for providing a first modulated signal; a second modulation circuit for receiving input Orthogonal Frequency Division Multiplexed (OFDM) baseband signals and for providing a second modulated signal; a selector for selecting either the first or the second modulated signal or both the first and second modulated signal and providing the selected signal or selected signals to one or more amplifiers; and two or more amplifiers for transmitting one or more selected modulated and amplified signals. 10. A system comprising: a first baseband Time Constrained Signal (TCS) waveform processor and Long Response (LR) filter structure for receiving baseband signals and for providing shaped waveforms and filtered baseband signals; a first modulation circuit for receiving said shaped waveforms and filtered baseband signals and for providing a first modulated signal; a first amplifier operated in a non-linearly amplified (NLA) mode for receiving and amplifying the first modulated signal; a second baseband processor for receiving and providing input Orthogonal Frequency Division Multiplexed (OFDM) baseband signals; a second modulation circuit for receiving said OFDM baseband signals and for providing a second modulated signal; a second amplifier operated in a linear amplification mode for receiving and amplifying the second modulated signal; a selector for selecting either the first or the second modulated signal or both modulated signals and providing the selected signal or selected signals to one or more amplifiers; and two or more amplifiers for transmitting one or more selected modulated and amplified signals. 11. A system comprising: a first baseband circuit for receiving and providing spread spectrum baseband signals; a first modulation circuit for receiving said spread spectrum baseband signals and for providing a first modulated signal; a first amplifier for receiving and amplifying the spread spectrum modulated signal; a second baseband circuit for receiving and providing peak limited Orthogonal Frequency Division Multiplexed (OFDM) baseband signals; a second modulation circuit for receiving said peak limited OFDM baseband signals and for providing an OFDM modulated signal; a second amplifier for receiving and amplifying the OFDM modulated signal; a third baseband circuit for receiving and providing filtered baseband signals; a third modulation circuit for receiving said filtered baseband signals and for providing a third modulated signal; a third amplifier for receiving and amplifying the filtered modulated signal; a selector for selecting either one or multiple modulated signals and providing the selected signal or selected signals to one or more amplifiers; and two or more amplifiers for transmitting one or more selected modulated and amplified signals.