Patent ID: 7289550

Claim:
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, the system comprising: a receiver unit comprising: a reference channel data generator configured to generate a reference channel data; a spreading and training sequence insertion device configured to generate a communication burst by spreading the reference channel data and time-multiplex the reference channel data with a training sequence in appropriate timeslots; an amplifier, in communication with the spreading and training sequence insertion device, the amplifier configured to amplify the communication burst; a summer, configured to receive the amplified communication burst and sum the amplified communication burst with other communication bursts; a modulator, configured to receive and modulate the summed amplified communication burst; an antenna configured to transmit the modulated communication burst and information relating to the transmitted power level, over an air interface; and a transmitter unit comprising: a demodulator configured to receive the transmitted modulated communication burst and generate a baseband signal; a channel estimation device configured to receive the baseband signal and extract channel information from the baseband signal; a data estimation device configured to interpret the power level of the communication burst; a weighted open loop power controller, said weighted open loop power controller comprising: a power measurement device for receiving the extracted channel information from the channel estimation device, a pathloss estimation device configured to receive the interpreted power level from the data estimation device and estimate the pathloss (L) and update a long term average of the pathloss (L 0 ) between the receiver unit and the transmitter unit, a quality measurement device to determine the quality of the estimated pathloss and weight the estimated pathloss by a weighting factor (α), and a transmit power calculation device, wherein the transmit power calculation device for determining the transmitter's unit power level and to control the receiver's unit amplifier.