DEVICE AND METHOD FOR ACQUIRING CODE IN CODE DIVISION MULTIPLE ACCESS COMMUNICATION SYSTEM
PURPOSE: A device and a method for acquiring a code is provided to simplify the structure of a hard ware and to perform a code acquisition quickly. CONSTITUTION: A device for acquiring a code is composed of: a sample selecting unit(100); a matched filter(200); a critical value judging unit(300); and...
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| Format: | Patent |
| Sprache: | eng ; kor |
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| Zusammenfassung: | PURPOSE: A device and a method for acquiring a code is provided to simplify the structure of a hard ware and to perform a code acquisition quickly. CONSTITUTION: A device for acquiring a code is composed of: a sample selecting unit(100); a matched filter(200); a critical value judging unit(300); and a Pseudo Noise(PN) code generating unit(400). Herein, the sample selecting unit is for selecting sample data to be inputted to the matched filter among received data and consists of sample delaying devices(110a, 110b, 110c, 110d) and a multiplexer(120). And the matched filter unit is composed of received data delaying devices(210a, 210b,..., 210n) and multiplies(220a, 220b,..., 220n).
본 발명에 따른 코드 획득 방식은 고정 유사 잡음 코드로 수신되는 데이터와 코릴레이션을 수행한 후, 코릴레이션 값이 소정 임계값보다 큰지를 판단한다. 그리고나서, 상기 코릴레이션 값이 소정 임계값보다 크다고 판단한 경우에는 가변 유사 잡음 코드로 상기 수신 데이터와 코릴레이션을 수행한다. |
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