COMMUNICATION SYSTEM AND PHASE ERROR ESTIMATING METHOD THEREOF

摘要

A communication system includes a receiving circuit and a phase error estimating circuit. The receiving circuit receives an input signal x, which has an input phase θ in a polar coordinate system. According to partial differentiation performed on the natural logarithm of a function f(x, θ), the phase error estimating circuit generates an estimated phase error of the input signal x. f(x, θ) represents a probability function of receiving the input signal x at the receiving circuit.

主权项

1. A communication system for estimating a phase error, comprising:
a receiving circuit, that receives an input signal x, the input signal x having an input phase θ; and a phase error estimating circuit, that generates an estimated phase error {circumflex over (θ)} according to an equation:θ^=∂∂θlnf(x,θ); wherein, f(x, θ) represents a probability function of the input signal x.