Patent ID: 7907904
Filing Date: 2011-03-15
Classification: H04W

Abstract:
1. An unlicensed wireless device configured to share spectrum between licensed and unlicensed wireless devices without generating unwanted interference by the unlicensed wireless device, comprising: an antenna to receive signals on a given channel and channels adjacent to the given channel; a channel receiver configured to investigate, in the unlicensed wireless device, the received signals to determine a received signal power level and a received signal type of the received signals in channels adjacent to the given channel; a level detector configured to extract time averaged amplitude coefficients for the channels adjacent to the given channel; an analog to digital converter to convert analog values of the time averaged amplitude coefficients to time sampled digital values; a level control algorithm configured to determine a lower power in one of the channels adjacent to the given channel and to generate a correction signal to adjust the signal supplied to a power amplifier; and a programmable power adjustor to adjust the power amplifier configured to transmit signals on the given channel without generating the unwanted interference to the licensed wireless device on at least one of the channels adjacent to the given channel, the transmitted signal on the given channel set in response to the received signal power level and the received signal type.