Device and method for removing co-channel interference signal in modulation/demodulation receiver having reference signal
AssigneeSamsung Electronics Co., Ltd.
InventorMyeong-Hwan Lee
Life of this patent
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Abstract
A modulation/demodulation receiver having a reference signal in a digital communication system. A method for signal processing and co-channel interference signal removal in the receiver includes the steps of processing an input signal to be at a predetermined multilevel, feeding the processed signal to an adaptive equalizer, determining the type of multilevel from the signal applied to the adaptive equalizer and selecting an operation mode from at least two multilevel operation modes, for the adaptive equalizer and blocks downstream from the adaptive equalizer, and causing the adaptive equalizer to adaptively equalize the signal at the predetermined multilevel in the selected operation mode and remove co-channel interference.
Claims17
A co-channel interference signal removing method in a modulation/demodulation receiver having a reference signal in a digital communication system, comprising the steps of:
- (1) processing an input signal to be at a predetermined multilevel, and applying the processed signal to an adaptive equalizer;
- (2) determining a multilevel type from the processed signal applied to the adaptive equalizer and selecting an operation mode from at least two multilevel operation modes, for the adaptive equalizer and blocks downstream of the adaptive equalizer;
- and
- (3) causing the adaptive equalizer to adaptively equalize the signal at the predetermined multilevel in the selected operation mode and remove co-channel interference.
A modulation/demodulation receiver having a reference signal in a digital communication system, comprising:
- a block for processing an input signal to be a multilevel signal of a predetermined type after subjecting the signal to tuning, IF processing, and demodulation;
- a mode selection controller for selecting an operation mode of the multilevel signal with respect to a reference signal period and a random data period depending upon whether a co-channel interference signal is present or absent in the multilevel signal;
- and
- an adaptive equalizer for equalizing and removing co-channel interference from the multilevel signal using a predetermined reference signal in the operation mode selected from at least two multilevel operation modes.
A signal processing method in a modulation/demodulation receiver having a reference signal in a digital communication system, comprising the steps of:
- processing an input signal to be at a predetermined multilevel, and applying the processed signal to an adaptive equalizer;
- determining a multilevel type from the processed signal applied to the adaptive equalizer and selecting an operation mode from at least two multilevel operation modes, for the adaptive equalizer and blocks downstream from the adaptive equalizer;
- and
- causing the adaptive equalizer to adaptively equalize the signal at the predetermined multilevel and the blocks downstream from the adaptive equalizer to operate in the selected operation mode.
A modulation/demodulation receiver having a reference signal in a digital communication system, comprising:
- a block for processing an input signal to be a multilevel signal of a predetermined type after subjecting the signal to tuning, IF processing, and demodulation;
- a mode selection controller for selecting an operation mode of the multilevel signal with respect to a reference signal period and a random data period depending upon whether a co-channel interference signal is present or absent in the multilevel signal;
- and
- an adaptive equalizer for equalizing the multilevel signal using a predetermined reference signal in the operation mode selected from at least two multilevel operation modes.
Dependencies are inferred from the claim text.