Patent ID: 7042927
Filing Date: 2006-05-09
Classification: H03C,H04B

Abstract:
1. A down-converter for down-converting an input signal from a carrier signal, said down-converter comprising: (a) means for quadrature phase shift keying (QPSK) modulating oscillator signals by independent PN signals to produce a QPSK modulated carrier signal, said oscillator signals being produced from an oscillator signal corresponding to said carrier signal; (b) means for down-converting said input signal with said modulated oscillator signal to produce a down-converted input signal; and, (c) means for quadrature phase shift keying (QPSK) de-spreading the frequency spectrum of down-converted input signals by said independent PN signals to produce an un-spread, down-converted output signal, said down-converted input signals being produced from said down-converted input signal.