Communication method and its power control method

Details Communication method and its power control method Communication method and its power control method

2005-11-01

2005-11-01

Tse, Young T. (Department: 2637)

Pulse or digital communications

Spread spectrum

C375S136000, C375S147000, C375S148000, C370S342000, C455S522000

Reexamination Certificate

active

06961362

ABSTRACT:
The purpose of the present invention is to offer a structure of a CDMA system having a power control method and interference cancellers which can effectively increase the system capacity and is resistant to sudden changes on the communication path, and to achieve a power control method with a fast response capable of preventing unnecessary increases in the transmission power (and multiple access interference) of the uplink by reflecting the values of the post-interference cancellation signal-to-interference power ratio in the generation of power control command information. The invention is directed to a power control method in a communication system for performing communications by code-division multiple access between a mobile station and base station, wherein a multiple access interference signal contained in a reception signal from the mobile station is cancelled, a post-interference cancellation signal-to-interference power ratio of the reception signal currently received is estimated, a power control command is generated by comparing the estimated post-interference cancellation signal-to-interference power ratio and a target value for power control, and transmitting this power control command to the mobile station to control the transmission power of the mobile station.

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Alexandra Duel-Hallen et al., “Multiuser Detection for CDMA Systems”, IEEE Personal Communications Apr. 1995, pp. 46-58.
Shimon Moshavi, Bellcore, “Multi-User Detection for DS-CDMA Communications”, IEEE Communications Magazine Oct. 1996; pp. 124-136.
ETSI TS 125 214 V3.2.0 (Mar. 2002), “Universal Mobile Telecommunications System (UMTS); Physical layer procedures (FDD) (3G TS 25.214 version 3.2.0. Release 1999)”.

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