Invention Grant
- Patent Title: System for using rapid acquisition spreading codes for spread-spectrum communications
- Patent Title (中): 使用快速采集扩频码进行扩频通信的系统
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Application No.: US09742990Application Date: 2000-12-21
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Publication No.: US07020111B2Publication Date: 2006-03-28
- Inventor: Fatih M. Ozluturk , Gary R. Lomp
- Applicant: Fatih M. Ozluturk , Gary R. Lomp
- Applicant Address: US DE Wilmington
- Assignee: InterDigital Technology Corporation
- Current Assignee: InterDigital Technology Corporation
- Current Assignee Address: US DE Wilmington
- Agency: Volpe and Koenig, P.C.
- Main IPC: H04J3/16
- IPC: H04J3/16

Abstract:
A system for rapidly acquiring a spreading code, used in a code division multiple access (CDMA) system comprises a generator for generating a first long code and a second long code, with each long code having a length of N chips. The first long code is different from the second long code. A transmitter transmits the first long code and the second long code at a first phase angle and at a second phase angle, respectively, on a carrier signal over a communications channel using radio waves. The first long code and the second long code may be transmitted at an in-phase (I) angle and at a quadrature-phase (Q) angle, respectively, on the carrier signal. From the communications channel, an I acquisition circuit and a Q acquisition circuit may acquire, in parallel, the first long code and the second long code from the I angle and the Q angle, respectively, of the carrier signal by searching, in parallel, N/2 chips of the first long code and the second long code.
Public/Granted literature
- US20020021686A1 System for using rapid acquisition spreading codes for spread-spectrum communications Public/Granted day:2002-02-21
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