Patent ID: 9386537
Filing Date: 2016-07-05
CPC Classification: H04B,H04W

Claim Text:
1. A received power estimation device for estimating received power at a time when a secondary radio signal transmitted from a transmitter of a secondary radio system is received at a receiver of a primary radio system while a frequency allocated to the primary radio system is shared with the secondary radio system, the received power estimation device comprising: at least one processor; a memory coupled to the at least one processor, the at least one processor being configured to compensate a received power estimate of the secondary radio signal at the receiver of the primary radio system, the received power estimate of the secondary radio signal being calculated using a path loss estimate from the transmitter of the secondary radio system to the receiver of the primary radio system, using a measured received power of the secondary radio signal measured at a near-transmitter sensor station that is located around the transmitter of the secondary radio system, wherein the near-transmitter sensor station is a single sensor station or a plurality of sensor stations selected based on a criterion that the following power ratio is large, or a single station or a plurality of stations selected based on a criterion that the following power ratio is equal to or more than a predetermined value, and the power ratio is defined as a ratio between the received power estimate of the secondary radio signal at the sensor station and the received power estimate of the primary radio signal of the transmitter of the primary radio system at the sensor station, where the received power estimate of the secondary radio signal is calculated using a path loss estimate from the transmitter of the secondary radio system to the sensor station, and the received power estimate of the primary radio signal is calculated using a path loss estimate from the transmitter of the primary radio system to the sensor station.