Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2006-08-10
2008-08-26
Tran, Khanh C (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
Reexamination Certificate
active
07418028
ABSTRACT:
Agile Radio Frequency (RF) band selectable systems and circuits process and provide selection of baseband filtered Orthogonal Frequency Division Multiplexed (OFDM) modulated signals, of spread spectrum (SS) modulated signals and of baseband in-phase (I) and quadrature-phase (Q) shaped and or filtered baseband cross-correlated and modulated signals. A selector selects one or more of the filtered and or shaped RF modulated signals and provides the selected signal to the transmission medium.RF tunable (RF agile) circuits receive a first baseband filtered and modulated signal at a first bit rate and provide a first RF modulated signal in a first specified RF band and receive a second baseband waveform shaped and modulated signal at a second bit rate and provide waveform shaped and modulated RF signal in a second specified RF band, with the second specified RF band having a different specified RF band than the first specified RF band and the first bit rate being different than the second bit rate. A selector selects one of the RF modulated signals and provides the selected signal to the transmission medium.
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Procopio Cory Hargreaves & Savitch LLP
Tran Khanh C
Wi-Lan Inc.
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