Abstract: A bidirectional equalizer and an equalization method using the bidirectional equalizer.

Abstract: A method for demodulating a carrier wave in a channel environment in which a pilot signal may be distorted, in a digital TV receiver, which may receive a vestigial sideband (VSB) modulated and transmitted signal, and a demodulation apparatus therefor are provided. A field synchronization part of a VSB signal, in which a pilot signal may be removed, may be used as a reference signal for synchronization. The frequency offset of a carrier wave may be estimated through self-correlation of a signal, and the phase offset of the carrier wave may be estimated through a pilot-less frequency and phase locked loop (FPLL).

Abstract: A receiver that receives radio signals, and a method for the same. The radio signals may be received by a plurality of antennas and then demodulated by respective converter devices, an estimated channel device estimates a channel for at least one antenna and at least one beam-forming device performs beam-forming on a selected main path signal from among the demodulated incident data signals. The output signals from the at least one beam-forming device are combined. The method of receiving the incident data signals may be accomplished by using space diversity.

Abstract: A bidirectional equalizer and an equalization method using the bidirectional equalizer.

Abstract: An equalizer and an equalization method usable in a high definition television (HDTV) are provided. The equalizer may receive an input signal including a data signal and a training sequence and may compensate for distortion of the input signal in a high definition television. The equalizer may include an input signal reuse unit, a filter unit, and an error calculation unit. The error calculation unit may receive an equalizer output signal, may estimate the equalizer output signal at an estimate value, may generate the estimate value as a decision value, and may output a difference between the equalizer output signal and the decision value as the error signal.

Abstract: A method for demodulating a carrier wave in a channel environment in which a pilot signal may be distorted, in a digital TV receiver, which may receive a vestigial sideband (VSB) modulated and transmitted signal, and a demodulation apparatus therefor are provided. A field synchronization part of a VSB signal, in which a pilot signal may be removed, may be used as a reference signal for synchronization. The frequency offset of a carrier wave may be estimated through self-correlation of a signal, and the phase offset of the carrier wave may be estimated through a pilot-less frequency and phase locked loop (FPLL).

Abstract: A receiver that receives radio signals, and a method for the same. The radio signals may be received by a plurality of antennas and then demodulated by respective converter devices, an estimated channel device estimates a channel for at least one antenna and at least one beam-forming device performs beam-forming on a selected main path signal from among the demodulated incident data signals. The output signals from the at least one beam-forming device are combined. The method of receiving the incident data signals may be accomplished by using space diversity.

Abstract: An equalizer for a single-carrier receiver having an enhanced convergence speed and a steady equalization performance. A filter unit filters received multi-path signals. A field synch extractor extracts a field synch signal having two signals of different levels from the received signals and a field synch storage unit stores a kth field synch signal of the extracted field synch signal. An error calculator N times repeatedly uses the kth field synch signal and calculates equalization error values, wherein the filter unit uses the equalization error values to update coefficients of the filters. Accordingly, the equalizer N times repeats the kth field synch signal to be compared to a reference signal generated from the field synch generator, so as to be operated in a training mode, to thereby enhance the convergence speed of the equalizer.

Abstract: An equalizer of a single carrier receiver and method thereof include a pre-ghost detection unit, a delay unit, an FF unit, and an FB unit. The pre-ghost detection unit detects one ghost from ghosts having levels higher than a predetermined threshold and detects a time delay of the detected ghost with respect to a main ghost. The delay unit delays an input field synchronization signal for the time delay and outputs a delay signal indicative thereof. The FF unit receives a pre-ghost to filter ghosts received before the detected ghost. The FB unit receives the delayed field synchronization signal to filter the ghosts received after the detected ghost.

Abstract: The present invention provides an equalizer capable of improving an equalization speed. The equalizer comprises a channel estimation unit estimating channel estimation values using a received signal inputted thereto and a generated field synchronizing signal, a filter filtering a pre-ghost and post-ghost of the received signal using the channel estimation values, wherein the filter initializes coefficients of filters thereof and updates the coefficients gradually, thereby filtering the pre and post-ghosts and an error calculation unit calculating an equalization error using an output signal from the filter unit. The filter updates the coefficients of the filters according to the equalization error and filters the pre and post-ghosts through these updated filters. The filters of the equalizer are initialized by estimating a delay profile of a received signal, thereby improving a convergence speed of equalization of an equalizer.

Abstract: An equalizer and an equalization method usable in a high definition television (HDTV) are provided. The equalizer may receive an input signal including a data signal and a training sequence and may compensate for distortion of the input signal in a high definition television. The equalizer may include an input signal reuse unit, a filter unit, and an error calculation unit. The error calculation unit may receive an equalizer output signal, may estimate the equalizer output signal at an estimate value, may generate the estimate value as a decision value, and may output a difference between the equalizer output signal and the decision value as the error signal.