Adjustable dual-band link

Details Adjustable dual-band link Adjustable dual-band link

2008-02-13

2008-11-11

Ha, Dac V (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S260000, C375S316000, C370S465000, C370S480000, C370S485000, C455S167100, C455S167100, C455S228000

Reexamination Certificate

active

07450629

ABSTRACT:
A communication system utilizing an adjustable link has at least a first data transmission circuit including at least a first communication link circuit. The first communication link circuit has a baseband circuit and at least a passband circuit. The baseband circuit corresponds to a baseband sub-channel and the passband circuit corresponds to a passband sub-channel. The first communication link circuit also includes a circuit that distributes a first subset of a data stream having a first symbol rate to the baseband circuit and a second subset of the data stream having a second symbol rate to the passband circuit. The baseband sub-channel and the passband sub-channel are separated by an adjacent guardband of frequencies. The passband carrier frequency is adjusted to define the guardband and the guardband corresponds to a first notch in a channel response of a first communications channel.

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