Co-channel interference canceler in simulcast receiver and method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorMyeong-hwan Lee
Life of this patent
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Abstract
A device for canceling co-channel interference and a method thereof are provided. The device, in a simulcast receiver for receiving a high definition television (HDTV) signal having a digital format and an analog broadcasting TV signal, includes a detector for detecting a synchronous signal from the analog broadcasting TV signal and outputting a detection signal, a co-channel interference rejection filter for removing co-channel interference from a first input signal including co-channel interference and outputting a second input signal, and a selector for selecting either the first or second input signal according to the detection signal. Therefore, the presence or absence of co-channel interference can be accurately determined regardless of channel environment.
Claims11
A co-channel interference canceler in a simulcast receiver for receiving a high definition television (HDTV) signal having a digital format and an analog broadcasting TV signal, comprising:
- a detector for detecting a synchronous signal from said analog broadcasting TV signal, determining whether or not the analog TV signal is received based on whether or not the synchronous signal is detected, and outputting a detection signal indicating whether or not the analog TV signal is received;
- a co-channel interference rejection filter for removing co-channel interference from a first input signal including co-channel interference and outputting a second input signal;
- and
- a selector for selecting either the first or second input signal according to said detection signal.
A co-channel interference canceler in a simulcast receiver for receiving a high definition television (HDTV) signal having a digital format and an analog broadcasting TV signal, comprising:
- a detector for detecting a reference signal from said analog broadcasting TV signal, determining whether or not the analog TV signal is received based on whether or not the reference signal is detected, and outputting a detection signal indicating whether or not the analog TV signal is received;
- a co-channel interference rejection filter for removing co-channel interference from a first input signal including co-channel interference and outputting a second input signal;
- and
- a selector for selecting either the first or second input signal according to said detection signal.
A method of removing co-channel interference for use in a simulcast receiver for receiving a high definition television (HDTV) signal having a digital format and an analog broadcasting TV signal, said method comprising the steps of:
- (a) detecting a synchronous signal from said analog broadcasting TV signal, determining whether or not the analog TV signal is received based on whether or not the synchronous signal is detected, and outputting a detection signal indicating whether or not the analog TV signal is received;
- (b) canceling co-channel interference from a first input signal including co-channel interference and other interference and outputting a second input signal;
- and
- (c) selecting either the first or second input signal according to said detection signal.
A method of removing co-channel interference for use in a simulcast receiver for receiving a high definition television (HDTV) signal having a digital format and an analog broadcasting TV signal, said method comprising the steps of:
- (a) detecting a reference signal from said analog broadcasting TV signal, determining whether or not the analog TV signal is received based on whether or not the reference signal is detected, and outputting a detection signal indicating whether or not the analog TV signal is received;
- (b) canceling co-channel interference from a first input signal including co-channel interference and outputting a second input signal;
- and
- (c) selecting either the first or second input signal according to said detection signal.
A co-channel interference canceler in a simulcast receiver, comprising:
- a tuner for receiving a high definition television (HDTV) signal having a digital format and an analog broadcasting TV signal;
- a first signal processor for demodulating the analog broadcasting TV signal and outputting a first demodulated signal;
- a second signal processor for demodulating the HDTV signal and outputting a second demodulated signal, said second signal processor including a co-channel interference rejection filter for removing co-channel interference from the HDTV signal;
- a first detector for detecting a synchronous signal from the first demodulated signal and outputting a first detection signal;
- a second detector for detecting a field or segment synchronous signal from the second demodulated signal and outputting a second detection signal;
- a determination signal generator for detecting the first detection signal and the second detection signal and generating a determination signal;
- and
- a selector for selecting either the first demodulated signal or the second demodulated signal according to the determination signal.
A simulcast receiver, comprising:
- a first signal processor operable to process an analog signal and to output a processed analog signal;
- a second signal processor operable to process a digital signal and to output a processed digital signal;
- a first detector operable to detect, using a control signal output by said first processor, whether or not the analog signal is being received and to output a first detection signal indicating whether or not the analog signal is being received;
- a co-channel interference rejection filter, included within said second processor, operable to remove co-channel interference from a first input signal which includes the co-channel interference, and to output a second input signal;
- and
- a selector operable to select either the first input signal or the second input signal according to the detection signal.
Dependencies are inferred from the claim text.