Calibration sub-system for telecommunication systems

摘要

A calibration sub-system for calibrating a unit of a distributed antenna system is provided. The calibration sub-system includes a signal generator, a receiver, and a processor. The signal generator provides test signals to a communication path that are generated based on modification schemes for an in-phase signal component (“I component”) or a quadrature signal component (“Q component”). The receiver receives output signals generated from test signals. The processor determines output power values for an undesirable signal component of the output signals. Each output power value is a Taylor series function or a polynomial function of a respective modification scheme for the I or Q component of the respective test signal. The processor determines an optimal modification scheme for the I or Q component that minimizes an output power of the undesirable signal component. An output value of the function is minimized by having the optimal modification scheme as an input.

主权项

1. A calibration sub-system for calibrating a unit of a distributed antenna system comprising:
a signal generator configured to provide a plurality of test signals to a communication path of the unit, wherein each of the plurality of test signals is generated based on a respective one of a plurality of modification schemes for at least one of an in-phase signal component and a quadrature signal component; a receiver disposed in the communication path of the unit, the receiver configured to receive a plurality of output signals generated using the plurality of test signals; and a processor communicatively coupled to the signal generator and the receiver, wherein the processor is configured to:
for each modification scheme of the plurality of modification schemes, determine a respective output power value for at least one undesirable signal component of a respective output signal received by the receiver, wherein the respective output power value is a function of the modification scheme for the in-phase signal component or the quadrature signal component of a respective test signal, the function being at least one of a Taylor series function or a polynomial function, anddetermine an optimal modification scheme for at least one of the in-phase signal component and the quadrature signal component such that an output power of the at least one undesirable signal component is minimized, wherein applying the function having the optimal modification scheme as an input minimizes an output value of the function.