Patent ID: 7382834

Claim:
A method for estimating a relative rotation between a first complex signal and a second complex signal, the method comprising: quantizing a first complex signal to produce a quantized signal; combining the quantized signal and an additional signal to produce a combined signal, the additional signal corresponding to a second complex signal; and generating an estimate of a relative rotation between the first complex signal and the second complex signal in accordance with the combined signal; wherein: the first complex signal includes a first in-phase component and a first quadrature component, and the second complex signal includes a second in-phase component and a second quadrature component; quantizing the first complex signal includes quantizing the first in-phase component and the first quadrature component; and combining includes combining multiplicative products of any of the quantized first in-phase component, the quantized first quadrature component, the second in-phase component, and the second quadrature component.