Weighted open loop power control system

Details Weighted open loop power control system Weighted open loop power control system

2007-10-30

2007-10-30

Ghebretinsae, Temesghen (Department: 2611)

Pulse or digital communications

Spread spectrum

C455S522000, C370S342000

Reexamination Certificate

active

11544275

ABSTRACT:
A weighted open loop power control system for controlling transmission power levels using a spread spectrum time division duplex (TDD) technique having frames with timeslots for communication comprises a receiver and a transmitter. The receiver includes a reference channel data generator, a spreading and training sequence insertion device, an amplifier, a summer, a modulator, and an antenna. The transmitter includes a demodulator configured to receive a transmitted signal from the receiver, a channel estimation device, a data estimation device, and a weighted open loop power controller. The weighted open loop power controller includes a power measurement device, a pathloss estimation device configured to receive an interpreted power level from the data estimation device and estimate the pathloss and update a long term average of the pathloss, a quality measurement device, and a transmit power calculation device for determining the transmitter's power level and to control the receiver's amplifier.

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3G TS 25.331 V3.2.0 (Mar. 2000), “Technical Specification Group Radio Access Network; RRC Protocol Specification”, Third Generation Partnership Project, Release 1999, pp. 117-118.
3G TS 25.331 V3.1.0 (Jan. 2000), “Technical Specification Group Radio Access Network; RRC Protocol Specification (3G TS 25.331 version 3.1.0 Release 1999)”, Third Generation Partnership Project, pp. 98-99.
3G TS 25.331 V1.0.0 (Apr. 1999), Technical Specification Group (TSG) RAN; Working Group 2 (WG2); RRC Protocol Specification.
ETSI TS 125 331 V3.1.0 (Jan. 2000); Universal Mobile Telecommunications System (UMTS); RRC Protocol Specification; (EG TS 25.331 version 3.1.0 Release 1999).
3G TS 25.225 V3.2.0 (Apr. 2000); Technical Specification Group Radio Access Network; Physical Layer-Measurements (TDD) (Release 1999).
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TS 25.102 V1.0.0 (Apr. 1999); Technical Specification Group (TSG) RAN WG4; UTRA (UE) TDD; Radio Transmission and Reception.
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Zeira et al., “Combined Closed-Loop/Open-Loop Power Control Process for Time Division Duplexing,” Apr., 1999.
Zeira et al., “Performance of Weighted Open Loop Scheme for Uplink Power Control in TDD Mode,” May, 1999.

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