Method and apparatus for receiving coupled signal of terrestrial signal and mobile signal

摘要

A receiving apparatus estimates a transmission channel of a signal through a training signal that is inserted into a data area of a received multipath signal, i.e., a mobile signal and a terrestrial signal that is coupled to the mobile signal, and estimates a transmission channel by detecting a received mobile signal using a previously equalized signal of a mobile signal and a transmitting signal corresponding to a terrestrial signal that is coupled to the mobile signal through determined data. Mobile signal data corresponding to training signal distortion existing in terrestrial signal data are compensated based on a channel estimation value.

主权项

1. A receiving apparatus of a coupled signal of a terrestrial signal and a mobile signal, the receiving apparatus comprising:
an antenna that receives the mobile signal and the terrestrial signal that are transmitted with one channel; a tuner that selects a desired frequency of the received signal by tuning and that converts the received signal to an intermediate frequency signal; an analog to digital converter (A/D converter) that converts the intermediate frequency signal that is converted in the tuner to a digital signal; a demodulator that demodulates and outputs the digital signal that is output from the A/D converter; and an equalization processor that estimates a transmission channel by detecting a training signal of the mobile signal and the terrestrial signal from an output signal of the demodulator and that compensates distortion existing in mobile signal data and terrestrial signal data; wherein the equalization processor comprises a first equalization processor that detects the training signal of the terrestrial signal from an output signal of the demodulator, estimates a transmission channel of the terrestrial signal through the training signal that is inserted into a data area of the terrestrial signal, and corrects distortion of terrestrial signal data, and a second equalization processor that detects the training signal of the mobile signal from an output signal of the demodulator or the first equalization processor, estimates a transmission channel of the mobile signal through the training signal that is inserted into a data area of the mobile signal, and corrects distortion of mobile signal data, wherein the first equalization processor comprises a first channel estimator that estimates a transmission channel of the terrestrial signal through the training signal that is inserted into a data area of the terrestrial signal from an output signal of the demodulator and that estimates a transmission channel by detecting a transmitting signal corresponding to a received terrestrial signal using a previously equalized signal through determined data and an adaptive filter that compensates distortion existing in the terrestrial signal data using a channel estimation value of the first channel estimator and a channel estimation value of a mobile signal that is input in the second equalization processor, and the second equalization processor comprises a second channel estimator that estimates a transmission channel of a mobile signal through the training signal that is inserted into a data area of the mobile signal from an output signal of the demodulator and that estimates a transmission channel by detecting a transmitting signal corresponding to a received mobile signal using a previously equalized signal through determined data, and that transfers the channel estimation value from the second channel estimator to the first equalization processor and an adaptive filter that compensates distortion existing in the mobile signal data using the channel estimation value from the second channel estimator.