초록 ▼

A wideband code division multiple access, spread-spectrum communications system, having an equalization channel. The transmitter transmits data over a spread-spectrum channel, along with a spread-spectrum channel having little or no information, i.e., an equalization channel. The receiver uses in-ph

A wideband code division multiple access, spread-spectrum communications system, having an equalization channel. The transmitter transmits data over a spread-spectrum channel, along with a spread-spectrum channel having little or no information, i.e., an equalization channel. The receiver uses in-phase early, punctual and late signals, and quadrature-phase early, punctual and late signals, for equalizing of the data spread-spectrum channel, and for generating an output in-phase data signal and an output quadrature-phase data signal.

대표청구항 ▼

[ I claim:] [4.] An improvement to a wideband code-division-multiple-access (W-CDMA) receiver for receiving a QPSK-spread-spectrum signal comprising an in-phase-combined-spread-spectrum signal and a quadrature-phase-combined-spread-spectrum signal, with the in-phase-combined-spread-spectrum signal i

[ I claim:] [4.] An improvement to a wideband code-division-multiple-access (W-CDMA) receiver for receiving a QPSK-spread-spectrum signal comprising an in-phase-combined-spread-spectrum signal and a quadrature-phase-combined-spread-spectrum signal, with the in-phase-combined-spread-spectrum signal including an equalization-chip-sequence signal combined with an in-phase-data signal spread-spectrum processed with a data-chip-sequence signal, and with the quadrature-phase-combined-spread-spectrum signal including an equalization-chip-sequence signal combined with a quadrature-phase-data signal spread-spectrum processed with the data-chip-sequence signal, the improvement comprising:in-phase-equalization means for despreading, at a first chip time and at a second chip time, an in-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal;quadrature-phase-equalization means for despreading, at the first chip time and at the second chip time, a quadrature-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal;in-phase-data means for despreading, at the first chip time and at the second chip time, the IDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal;quadrature-phase-data means for despreading, at the first chip time and at the second chip time, the QDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; anda processor, coupled to said in-phase-equalization means, said quadrature-phase-equalization means, said in-phase-data means, and said quadrature-phase-data means, for determining, from the despread signals, an output-in-phase-data signal and an output-quadrature-phase-data signal.