Transmission/reception digital circuit in CDMA system

Details Transmission/reception digital circuit in CDMA system Transmission/reception digital circuit in CDMA system

2001-12-27

2008-09-02

Tran, Khai (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C370S342000

Reexamination Certificate

active

07421007

ABSTRACT:
The present invention relates to a digital transmitting/receiving circuit (1) intended to be mounted on at least one source and on at least one concentrator exchanging binary symbols with the said sources, the said circuit (1) comprising a transmitter (2) capable of transmitting the said binary symbols and a receiver (4) capable of receiving symbols transmitted by a source, the circuit (1) being characterized in that the transmitter (2) comprises a first module (20) intended to generate at least one binary code for effecting the spectral spreading of symbols to be transmitted and a second module (22) intended to generate at least one internal clock signal for synchronizing the reception of symbols transmitted by a source, and in that the said receiver comprises means (46, 48) for detecting new sources of transmission and means (49) for generating synchronization signals and power control signals corresponding to each new source detected.

REFERENCES:
patent: 6005854 (1999-12-01), Xu et al.
patent: 6094576 (2000-07-01), Hakkinen et al.
patent: 6198731 (2001-03-01), Hamada et al.
patent: 6212222 (2001-04-01), Okubo et al.
patent: 6542493 (2003-04-01), Moerder
patent: 6674788 (2004-01-01), Lomp et al.
patent: 6771625 (2004-08-01), Beal
patent: 6963753 (2005-11-01), Hamabe
patent: 2002/0085652 (2002-07-01), Okubo et al.

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