Wideband code-division-multiple access system and method
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04J-013/04
H04L-027/92
출원번호
US-0703826
(1996-08-27)
발명자
/ 주소
Apelewicz Tuvia,ILX
출원인 / 주소
TransSKY Corp.
대리인 / 주소
David Newman Chartered
인용정보
피인용 횟수 :
34인용 특허 :
31
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-phases 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:] [1.] An improvement to a wideband code-division-multiple-access (W-CDMA) system, comprising:a W-CDMA transmitter, said W-CDMA transmitter including,an in-phase-data-product device for multiplying an in-phase-data (IDATA) signal with a data-chip-sequence signal, thereby generating an IDAT
[ I claim:] [1.] An improvement to a wideband code-division-multiple-access (W-CDMA) system, comprising:a W-CDMA transmitter, said W-CDMA transmitter including,an in-phase-data-product device for multiplying an in-phase-data (IDATA) signal with a data-chip-sequence signal, thereby generating an IDATA-spread-spectrum signal;a quadrature-phase-data-product device for multiplying a quadrature-phase-data (QDATA) signal with the data-chip-sequence signal, thereby generating a QDATA-spread-spectrum signal;equalization-chip means for outputting an equalization-chip-sequence signal;an in-phase combiner, coupled to said in-phase-data-product device and to said equalization-chip means, for linearly combining the IDATA-spread-spectrum signal and the equalization-chip-sequence signal, to generate an in-phase-combined-spread-spectrum signal;a quadrature-phase combiner, coupled to said quadrature-phase-data-product device and to said equalization-chip means, for linearly combining the QDATA-spread-spectrum signal, and the equalization-chip-sequence signal, to generate the quadrature-phase-combined-spread-spectrum signal;a quadrature-phase-shift-keyed (QPSK) modulator, coupled to said in-phase combiner and to said quadrature-phase combiner, for QPSK modulating the in-phase-combined-spread-spectrum signal with the quadrature-phase-combined-spread-spectrum signal, thereby generating a QPSK-spread-spectrum signal;a power amplifier, coupled to said QPSK modulator, for amplifying the QPSK-spread-spectrum signal;a transmitter antenna, coupled to said power amplifier, for radiating the amplified QPSK-spread-spectrum signal over a communications channel;a W-CDMA receiver, said W-CDMA receiver including,a receiver antenna for coupling the W-CDMA receiver to the communications channel;in-phase-punctual-equalization (IPE) means, coupled to said receiver antenna, for despreading an in-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal, as a received-in-phase-punctual-equalization signal (RIEQ.sub.P);first in-phase-late-equalization (ILE) means, coupled to said receiver antenna, for despreading, a first portion of a chip late, the in-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal, as a first received-in-phase-late-equalization signal (RIEQ.sub.L1);quadrature-phase-punctual-equalization (QPE) means, coupled to said receiver antenna, for despreading a quadrature-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal, as a received-quadrature-phase-punctual-equalization signal (RQEQ.sub.P);first quadrature-phase-late-equalization (QLE) means, coupled to said receiver antenna, for despreading, the first portion of the chip late, the quadrature-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal, as a first received-quadrature-phase-late-equalization signal (RQEQ.sub.L1);in-phase-punctual-data (IPD) means, coupled to said receiver antenna, for despreading the IDATA-spread-spectrum signal embedded in the QPSK-spread-spectrum signal as a received-in-phase-punctual-data signal (RIDATA.sub.P);first in-phase-late-data (ILD) means, coupled to said receiver antenna, for despreading, the first portion of the chip late, the IDATA-spread-spectrum signal embedded in the QPSK-spread-spectrum signal, as a first received-in-phase-late-data signal (RIDATA.sub.L1);quadrature-phase-punctual-data (QPD) means, coupled to said receiver antenna, for despreading the QDATA-spread-spectrum signal embedded in the QPSK-spread-spectrum signal as a received-quadrature-phase-punctual-data signal (RQDATA.sub.P);first quadrature-phase-late-data (QLD) means, coupled to said receiver antenna, for despreading, the first portion of the chip late, the QDATA-spread-spectrum signal embedded in the QPSK-spread-spectrum signal, as a first received-quadrature-phase-late-data signal (RQDATA.sub.L1); anda processor for determining a first punctual-equalization signal (EQ1.sub.P) from the received-in-phase-punctual-equalization signal (RIEQ.sub.P) plus the received-quadrature-phase-punctual-equalization signal (RQEQ.sub.P), for determining a second punctual-equalization signal (EQ2.sub.P) from the received-quadrature-phase-punctual-equalization signal (RQEQ.sub.P) minus the received-in-phase-punctual-equalization signal (RIEQ.sub.P), for determining a first late-equalization signal (EQ1.sub.L) from the first received-in-phase-late-equalization signal (RIEQ.sub.L1) plus the first received-quadrature-phase-late-equalization signal (RQEQ.sub.L1), for determining a second late-equalization signal (EQ2.sub.L) from the first received-quadrature-phase-late-equalization signal (RQEQ.sub.L1) minus the first received-in-phase-late-equalization signal (RIEQ.sub.L1), for determining an in-phase-punctual-data signal (IDATA.sub.P) from the received-in-phase-punctual-data signal (RIDATA.sub.P) times the first punctual-equalization signal (EQ1.sub.P), plus the received-quadrature-phase-punctual-data signal (RQDATA.sub.P) times the second punctual-equalization signal (EQ2.sub.P), for determining a quadrature-phase-punctual-data signal (QDATA.sub.P) from the received-quadrature-phase-punctual-data signal (RQDATA.sub.P) times the first punctual-equalization signal (EQ1.sub.P), minus the received-in-phase-punctual-data signal (RIDATA.sub.P) times the second punctual-equalization signal (EQ2.sub.P), for determining a first in-phase-late-data signal (IDATA.sub.L1) from the first received-in-phase-late-data signal (RIDATA.sub.L1) times the first late-equalization signal (EQ1.sub.L), plus the first received-quadrature-phase-late-data signal (RQDATA.sub.L1) times the second late-equalization signal (EQ2.sub.L), for determining a first quadrature-phase-late-data signal (QDATA.sub.L1) from the first received-quadrature-phase-late-data signal (RQDATA.sub.L1) times the first late-equalization signal (EQ 1.sub.L), minus the first received-in-phase-late-data signal (RIDATA.sub.L1) times the second late-equalization signal (EQ2.sub.L), for determining an output-in-phase-data signal (IDATA.sub.O) from IDATA.sub.O =IDATA.sub.L1 +IDATA.sub.P and for, determining an output-quadrature-phase-data signal (QDATA.sub.O) from QDATA.sub.O =QDATA.sub.L1 +QDATA.sub.P.
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