Dynamic equalization systems and methods for use with a receiver for a multipath channel

摘要

A dynamic equalization system and method for use with a receiver is provided. The receiver may include an antenna for receiving a signal having multipath signal components and a digitizer for obtaining and digitizing the received signal and multipath signal components. The digitized signal segment and multipath signal components may be discretized into signal segments of length n. Channel parameters of each of the discrete signal segments may be analyzed and locked to, and a time-domain representation of the analyzed channel parameters may be output. Each time-domain representation may be Fourier transformed into a frequency-domain representation, based upon which equalization parameters to equalize the multipath signal components for each of the analyzed channel parameters may be determined. The equalization parameters may be applied to corresponding signal segments of the digitized signal and multipath signal components so as to equalize the multipath signal components.

主权项

1. A dynamic equalization system for use with a receiver, the receiver comprising an antenna configured to receive a signal distorted by multipath signal components and a digitizer configured to obtain and digitize the signal and multipath signal components received by the antenna, the dynamic equalization system comprising:
an equalization estimator configured to receive the digitized signal and multipath signal components from the digitizer, the equalization estimator comprising:
acquisition circuitry configured to sequentially output discrete signal segments of length n of the digitized signal and multipath signal components;channel parameter loop circuitry configured to sequentially analyze and lock to channel parameters including phase, delay, and carrier frequency of the corresponding signal segment, and to output a time-domain representation of each of the analyzed channel parameters for the corresponding signal segment;Fourier transform circuitry configured to sequentially Fourier transform each time-domain representation into a frequency-domain representation for each of the analyzed channel parameters for the corresponding discrete signal segment, and to output the frequency-domain representation; andan equalization processor configured to determine and output equalization parameters to equalize the multipath signal components for each of the analyzed channel parameters based on the frequency-domain representations; an equalizer configured to sequentially receive the discrete signal segments of the digitized signal and multipath signal components from the acquisition circuitry, to sequentially receive the equalization parameters from the equalization processor, to sequentially apply the equalization parameters to the corresponding signal segments so as to equalize the multipath signal components, and to output the equalized signal segments; and alignment circuitry configured to sequentially receive the corresponding equalized signal segments from the equalizer and the analyzed channel parameters for an earliest-in-time signal component from the equalization processor and to align the earliest-in-time signal component with the equalized multipath signal components within the equalized signal segments based thereon.