QPSK demodulator
Quadrature multi-frequency ranging (QMFR) applied to GPS...
Quadrature multi-frequency ranging (QMFR) applied to GPS...
Quadrature phase modulation receiver for spread spectrum...
Quadriphase spreading codes in code division multiple access...
Quasi-orthogonal code mask generating device in mobile...
Quotient phase-shift processor for digital phase-locked-loops