US Patent No: 6,650,693

Number of patents in Portfolio can not be more than 2000

Complex type correlator in CDMA system and initial synchronization acquiring method using the same

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Importance

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Abstract

An correlator for acquiring initial synchronization and initial synchronization acquiring method using the same by means of signals to be transmitted from receiving stages of a base station and a mobile station in a CDMA system is disclosed. The correlator includes a plurality of shift registers that each shift received spread signals, a plurality of multipliers that each multiply the shifted spread signal by each pseudo random code stored therein, an adder that adds the multiplied results from the multipliers, and an accumulating adder that adds in recursive pattern the added result from the adder over a predetermined times. Accordingly, the present invention has the effect that reduces initial synchronization time while realizing simple structure.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
TRANSPACIFIC BLUETOOTH, LLCWILMINGTON, DE22

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lee, Woo Jae Seoul, KR 20 12
Park, Jae Hong Kyoungsangbuk-do, KR 41 73

Cited Art

Patent Info (Count) # Cites Year
 
NEC CORPORATION (2)
6,088,382 Cell search circuit for CDMA 8 1997
6,385,180 High-speed cell search system for CDMA 12 1998
 
BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS INTEGRATION INC. (1)
5,184,135 Phase measurement of received pseudonoise sequence using digital correlation 25 1992
 
INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE (1)
5,663,983 Differentially matched filter for a spread spectrum system 6 1995
 
LUCENT TECHNOLOGIES INC. (1)
6,470,000 Shared correlator system and method for direct-sequence CDMA demodulation 25 1998
 
NTT DOCOMO, INC. (1)
5,768,306 Sliding correlator used in CDMA systems to establish initial synchronization 44 1997
 
RESEARCH IN MOTION LIMITED (1)
6,411,610 Correlation for synchronizing to long number sequences in communications systems 14 1998
 
SAMSUNG ELECTRONICS CO., LTD. (1)
6,263,011 Receiver for spread spectrum communication system capable of shortening acquisition time 11 1998
 
SK TELECOM CO., LTD. (1)
5,956,367 Rake receiving apparatus for direct sequence code division multiple access system 20 1997
 
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) (1)
5,960,048 Method and an arrangement for receiving a symbol sequence 29 1997
 
XIRCOM WIRELESS, INC. (1)
5,680,414 Synchronization apparatus and method for spread spectrum receiver 37 1995

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
CISCO TECHNOLOGY, INC. (1)
7,577,188 Physical layer and MAC enhancements using complex sequences on a wireless channel 0 2001
 
FREESCALE SEMICONDUCTOR, INC. (1)
7,079,604 Ultrawide bandwidth system and method for fast synchronization using multiple detection arms 17 2000
 
RPX CORPORATION (1)
7,839,915 Reception of a spread spectrum modulated signal 0 2005

Maintenance Fees

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