[특허]CDMA rake receiver with sub-chip resolution

CDMA rake receiver with sub-chip resolution 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04B-001/707
출원번호	US-0427519 (1995-04-24)
발명자 / 주소	Kostic Zoran (Tinton Falls NJ) Pavlovic Gordana (Tinton Falls NJ)
출원인 / 주소	Lucent Technologies Inc. (Murray Hill NJ 02)
인용정보	피인용 횟수 : 54 인용 특허 : 0

초록 ▼

A rake receiver for use in direct-sequence code-division multiple-access communication systems employs a novel channel estimator capable of resolving multipath components spaced closer than a chip interval of the direct-sequence signature sequence. The estimator utilizes a constrained iterative deconvolution technique which employs projection onto convex sets (POCS). In a matched filter rake receiver embodiment, the delay TSC between two taps of a delay line is smaller than the duration TC of a chip of pseudo-random sequence. A rake receiver constructed in this manner is capable of detecting signals that have propagated through multipath channels and that have path components spaced closer than one chip of the signal sequence (i.e. closer than the inverse of the signal bandwidth).

대표청구항 ▼

A spread spectrum receiver for use in a direct sequence, code division multiple access (DS-CDMA) communication system in which a given CDMA signature sequence is assigned to said receiver and to a source synchronized with the receiver and wherein the system has a predetermined symbol transmission rate 1/Tb, a processing gain, and a corresponding chip rate 1Tc determined by the processing gain and symbol transmission rate, said receiver comprising: means for sampling an incoming analog signal including a transmitted symbol and propagating in said DS-CDMA system to thereby produce an incoming sampled signal, said incoming analog signal having a plurality of both main and multipath return signals of varying signal strengths; a tapped delay line for receiving said incoming sampled signal and having a plurality of taps for producing a set of sampled outputs produced by said sampling means, said delay line having a number of taps that exceeds Tb/Tc; a pseudo-noise code generator for generation an apropriate pseudo-noise waveform for multiplication with each sampled output; and demodulating means for demodulating said incoming sampled signal to generate a detected symbol which estimates the transmitted symbol.

이 특허를 인용한 특허 (54)

Pan,Li; Shah,Jigneshkumar; Liu,Fenghua, Apparatus and method for hybrid traffic and pilot signal quality determination of finger lock status of rake receiver correlators.
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Klang Goran,SEX ; Konradsson Per,SEX, CDMA receiver that shares a tracking device among multiple rake branches.
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Keel, Alton Shelborne; Litwin, Louis Robert, Cell search using rake searcher to perform scrambling code determination.
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Batalama Stella N. ; Pados Dimitris A., Circuitry and method for demodulating code division multiple access (CDMA) signals.
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Olaf Josef Hirsch, Combining sub-chip resolution samples in arms of a spread-spectrum rake receiver.
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Wei, Yongbin; Malladi, Durga Prasad; Blanz, Josef, Communication receiver with an adaptive equalizer.
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Kent Mark ; Landau Url M. ; Sharifnejad Toosi Elahe, Direct sequence CDMA device and method for using the same.
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Molisch,Andreas; Li,Ye; Zhang,Jinyun, Estimating channel impulse response and equalizer coefficients in UWB communication systems.
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Shan,Peijun, Estimation of multipath channel with sub-chip resolution.
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Uchishima Makoto,JPX ; Hamada Hajime,JPX, Fading equalizer.
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Tran Jean-Marie, Finger assignment in a CDMA rake receiver.
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Yoon Young C.,CAX ; Leib Harry,CAX, Interference suppression in DS-CDMA systems.
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Kido, Naoshige, Matched filter and method for determining correlation.
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Bottomley, Gregory E.; Molnar, Karl; Ramesh, Rajaram, Method and apparatus for digital symbol detection using medium response estimates.
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Lundby, Stein; Razoumov, Leonid; Wheatley, III, Charles E., Method and apparatus for multipath demodulation in a code division multiple access communication system.
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Lundby,Stein; Razoumov,Leonid; Wheatley, III,Charles E., Method and apparatus for multipath demodulation in a code division multiple access communication system.
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Shan,Peijun; King,Eric J., Method and apparatus for multipath signal compensation in spread-spectrum communications systems.
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De, Parthapratim; Zeira, Ariela; Pan, Jung-Lin; Misra, Raj Mani, Method and apparatus for receiving plurality of data signals.
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De,Parthapratim; Zeira,Ariela; Pan,Jung Lin; Misra,Raj Mani, Method and apparatus for receiving plurality of data signals.
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Kontola, Ilkka, Method and apparatus for reducing the effect of multipath propagation in a received signal.
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Yousef,Nabil R.; Sayed,Ali H., Method and apparatus for resolving multipath components for wireless location finding.
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Jones, Alan E.; Anderson, Nicholas W., Method and arrangement for noise variance and SIR estimation.
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Keel, Alton Shelborne; Litwin, Louis Robert, Method and system for sub-chip resolution for secondary cell search.
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Braam,Reinhold; Imhof,Markus; Ludwig,Mathias, Method for detecting multipath signals.
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Doetsch, Markus; Kella, Tideya; Schmidt, Peter; Jung, Peter; Plechinger, Jörg; Schneider, Michael, Method for estimating channel impulse responses of a mobile radio channel.
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Schelm,Jacob; Shabtay,Ophir; Avital,Yaniv; Reshef,Ehud, Multipath channel tap delay estimation in a CDMA spread spectrum receiver.
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Frank, Georg; Schulist, Mathias; Granzow, Wolfgang; Maurer, Alexander; Popovic, Branislav, Multipath propagation delay determining means using periodically inserted pilot symbols.
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Yang,George L., Multipath rake receiver of high symbol rate burst communication system.
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Yang,George L., Multipath receiver of a spread spectrum communication system with dynamic matched filter and efficient signal combiner.
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Schilling, Donald L., Multiple-input multiple-output (MIMO) spread-spectrum system and method.
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Aoyama Akio,JPX, Path-diversity CDMA reception by detecting lower-peak correlation sequence following removal of higher-peak sequences.
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Li,Yingxue; Harel,Haim, Processing diversity signals using a delay.
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Lin,Che Li, Rake finger receiver and method therefor in a spread spectrum communication system.
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Zaslavsky, Dan; Guetta, Rami; Hitron, Rony; Krivchenko, Grigory; Burt, Michael; Poreh, Michael, Renewable resource hydro/aero-power generation plant and method of generating hydro/aero-power.
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Zaslavsky, Dan; Guetta, Rami; Hitron, Rony; Krivchenko, Grigory; Burt, Michael; Poreh, Michael, Renewable resource hydro/aero-power generation plant and method of generating hydro/aero-power.
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Hayata,Toshihiro, Search method in CDMA mobile communication receiving system and receiving device.
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De,Parthapratim; Zeira,Ariela; Pan,Jung Lin; Misra,Raj Mani, Single user detection.
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De,Parthapratim; Zeira,Ariela; Pan,Jung Lin; Misra,Raj Mani, Single user detection base station.
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De,Parthapratim; Zeira,Ariela; Pan,Jung Lin; Misra,Raj Mani, Single user detection base station.
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De,Parthapratim; Zeira,Ariela; Pan,Jung Lin; Misra,Raj Mani, Single user detection base station.
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De,Parthapratim; Zeira,Ariela; Pan,Jung Lin; Misra,Raj Mani, Single user detection base station.
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De,Parthapratim; Zeira,Ariela; Pan,Jung Lin; Misra,Raj Mani, Single user detection base station.
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De,Parthapratim; Zeira,Ariela; Pan,Jung Lin; Misra,Raj Mani, Single user detection base station.
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De,Parthapratim; Zeira,Ariela; Pan,Jung Lin; Misra,Raj Mani, Single user detection user equipment.
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De,Parthapratim; Zeira,Ariela; Pan,Jung Lin; Misra,Raj Mani, Single user detection user equipment.
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De,Parthapratim; Zeira,Ariela; Pan,Jung Lin; Misra,Raj Mani, Single user detection user equipment.
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De,Parthapratim; Zeira,Ariela; Pan,Jung Lin; Misra,Raj Mani, Single user detection user equipment.
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De,Parthapratim; Zeira,Ariela; Pan,Jung Lin; Misra,Raj Mani, Single user detection user equipment.
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De,Parthapratim; Zeira,Ariela; Pan,Jung Lin; Misra,Raj Mani, Single user detection user equipment.
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Smolyar Lev,ILX ; Yellin Danny,ILX ; Rainish Doron,ILX, System and method for joint time tracking of multiple paths.
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Smolyar, Lev; Yellin, Daniel; Rainish, Doron, System and method for joint time tracking of multiple paths.
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Malladi, Durga Prasad; Blanz, Josef J.; Wei, Yongbin, Systems and methods for improving channel estimation.
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Malladi, Durga Prasad; Blanz, Josef; Wei, Yongbin, Systems and methods for improving channel estimation.
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Schmidl, Timothy M.; Hosur, Srinath; Dabak, Anand G., Wireless code division multiple access communications system with channel estimation using fingers with sub-chip spacing.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

CDMA rake receiver with sub-chip resolution 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

이 특허를 인용한 특허 (54)

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연합인증

CDMA rake receiver with sub-chip resolution 원문보기

초록 ▼

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연구과제 타임라인

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이 특허를 인용한 특허 (54)

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