Automatic transmit power control in XPIC configuration for wireless applications

摘要

A method of automatic transmit power control in a radio communication system employing a co-channel dual-polarized radio link between a first radio station and a second radio station. The method comprises receiving a horizontal polarized signal and a vertical polarized signal transmitted from the second radio station to the first radio station and in the first radio station estimating a received power level value from said received horizontal polarized signal, and a received power level value from said received vertical polarized signal. Determined power corrections values are transmitted to the second radio station during a transmission of the first radio station to adjust the transmit power of the second radio station. The determining of said transmit power correction values are independently determined from said estimated received power level values, a target power value, a cross polarization interference threshold level value, and said cross polarization interference level values.

主权项

1. A method of automatic transmit power control in a radio communication system employing a co-channel dual-polarized radio link between a first radio station and a second radio station, the method comprising:
receiving a horizontal polarized signal and a vertical polarized signal transmitted from said second radio station to said first radio station; in said first radio station: estimating a received power level value, PRxH, from said received horizontal polarized signal, and a received power level value, PRxV , from said received vertical polarized signal; determining a cross polarization interference level value, XPIH, from said received horizontal polarized signal, and a cross polarization interference level value, XPIV, from said received vertical polarized signal; determining power corrections values ΔPTxH and ΔPTxV; and transmitting said determined power corrections values to said second radio station using a service channel for enabling adjustment of the transmit power of said second radio station based on received said power corrections values, wherein said determining of said power correction values are independently determined from said estimated received power level values and a target power value, PWTG, under a condition that said power correction values do not exceed a cross polarization interference threshold level value, XPITH, such that XPITH ≦XPIH+ΔPTxH−ΔPTxV and XPITH ≦XPIV+ΔPTxV−ΔPTxH, and wherein said cross polarization interference threshold level value is based on said cross polarization interference level values and said power corrections values.