[특허]System and method for bit timing synchronization in an adaptive direct sequence CDMA communication system

System and method for bit timing synchronization in an adaptive direct sequence CDMA communication system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04L-009/00
출원번호	US-0073226 (1993-06-04)
발명자 / 주소	Lee Edward K. B. (Sunrise FL) Cadd Jimmy (Coral Springs FL) Fulghum Tracy L. (Sunrise FL) Babayi Robert S. (Sunrise FL)
출원인 / 주소	Motorola, Inc. (Schaumburg IL 02)
인용정보	피인용 횟수 : 115 인용 특허 : 0

초록 ▼

In a CDMA communication system (100) capable of communicating between a receiver (20) and a transmitter (10) direct sequence spread spectrum communication signals (30), a system and method for synchronizing receiver bit timing and transmitter timing. Transmitter (10) transmits a training bit sequence (31) followed by a transmitter bit timing sequence (33). The receiver (20) adaptively determines a representation of a despreading chip sequence using a tapped delay line equalizer (400). Receiver bit timing offset is determined based on the representation of the despreading chip sequence and the transmitter bit timing sequence (33).

대표청구항 ▼

In a direct sequence CDMA spread spectrum communication system, wherein spread spectrum communication signals comprising binary bits coded with spreading chip sequences are communicated between a transmitter and a receiver; a bit synchronization method for synchronizing receiver bit timing with transmitter bit timing comprising the steps of: a) transmitting a direct sequence spread spectrum communication signal (DS-SS) including a redundant training bit sequence followed by a transmitter bit timing sequence coded with a spreading chip sequence; b) despreading the DS-SS communication signal based on said redundant training bit sequence to provide a decoded communication signal; and c) determining receiver bit timing offset based on the transmitter bit timing sequence and the decoded communication signal.

이 특허를 인용한 특허 (115)

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System and method for bit timing synchronization in an adaptive direct sequence CDMA communication system 원문보기

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System and method for bit timing synchronization in an adaptive direct sequence CDMA communication system 원문보기

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