Selecting spreading code in spread spectrum system

Details Selecting spreading code in spread spectrum system Selecting spreading code in spread spectrum system

2007-12-25

2007-12-25

Ho, Duc (Department: 2616)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S342000, C370S441000, C375S130000

Reexamination Certificate

active

10137700

ABSTRACT:
The invention relates to a base transceiver station in a CDMA mobile telephone system, including a mechanism for maintaining a code tree which determines spreading codes to be used in the system, a mechanisms for selecting a spreading code from the code tree for the communication between the base transceiver station and terminal equipment communicating with the base transceiver station. The mechanisms for selecting a spreading code are configured to select a highest level in the code tree which includes at least one branch of the code tree whose spreading codes are allocatable, and allocate for use a spreading code generated from a branch of the selected level whose spreading codes are allocatable. The invention further relates to a method and a communication system in connection with Code Division Multiple Access (CDMA) technology.

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Thit Minn, Kai-Yeung Siu: “Dynamic Assignment of Orthogonal Variable-Spreding-Factor Codes in W-CDMA”, IEEE Journal on Selected Areas in Communications, Aug. 2000, IEEE, USA, vol. 18, nr. 8, pp. 1429-1440, ISSN 0733-8716.
Ray-Guang Cheng, Phone Lin: “OVSF Code Channel Assignment for IMT-2000”, IEEE 51stVehicular Technology Conference Proceedings, VTC2000, Tokyo, Japan, May 15-18, 2000, pp. 2188-2192, vol., 3, ISBN 0-7803-5718-3.
Lih-feng Tsaur, Lee D.C.: Symbol Rate Adaptation and Blind Rate Detection Using FOSSIL (Forest for OVSF-Sequence-Set-Inducing Lineages), Proceedings of IEEE International Conference on Communications, Helsinki, Finland, Jun. 11-14, 2001, pp. 1754-1759, vol. 6, ISBN 0-7803-7097-1.
Finnish Office Action dated Feb. 8, 2002.
Thit Minn, Kai-Yeung Siu: “Dynamic Assignment of Orthogonal Variable-Spreding-Factor Codes in W-CDMA”, IEEE Journal on Selected Areas in Communications, Aug. 2000, IEEE, USA, vol. 18, nr. 8, pp. 1429-1440, ISSN 0733-8716.
Ray-Guang Cheng, Phone Lin: “OVSF Code Channel Assignment for IMT-2000”, IEEE 51stVehicular Technology Conference Proceedings, VTC2000, Tokyo, Japan, May 15-18, 2000, pp. 2188-2192, vol. 3, ISBN 0-7803-5718-3.
Lih-teng Tsuar, Lee D.C.: Symbol Rate Adaptation and Blind Rate Detection Using FOSSIL (Forest for OVSF-Sequence-Set-Inducing Lineages), Proceedings of IEEE International Conference on Communications, Helsinki, Finland, Jun. 11-14, 2001, pp. 1754-1759, vol. 6, ISBN 0-7803-7097-1.
Finnish Office Action dated Feb. 8, 2002.

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