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QPSK demodulator

Pulse or digital communications – Spread spectrum – Direct sequence
Patent

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Quadrature multi-frequency ranging (QMFR) applied to GPS...

Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate

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Quadrature multi-frequency ranging (QMFR) applied to GPS...

Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate

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Quadrature phase modulation receiver for spread spectrum...

Pulse or digital communications – Spread spectrum – Direct sequence
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Quadriphase spreading codes in code division multiple access...

Pulse or digital communications – Spread spectrum – Direct sequence
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Qualification and selection of the frequency channels for an...

Pulse or digital communications – Spread spectrum – Frequency hopping
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Quasi-optimal receiver for tracking and acquisition of a split s

Pulse or digital communications – Spread spectrum
Patent

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Quasi-orthogonal code mask generating device in mobile...

Pulse or digital communications – Spread spectrum – Direct sequence
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Quotient phase-shift processor for digital phase-locked-loops

Pulse or digital communications – Spread spectrum – Direct sequence
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