Analog signal noise reduction process and apparatus
First Claim
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1. Apparatus for receiving an analog information carrying signal having an amplitude, the information carrying signal having information and noise components, the information component also having frequencies associated with it, the apparatus comprising:
- (1) three discrete signal receiving channels for receiving the information carrying signal;
(2) logic means connected to said signal receiving channels for comparing the amplitude of the information carrying signal received by each of the receiving channels and for;
(a) when two or more of said signals received by said channels have substantially equal amplitudes, outputing any one of said two or more signals;
(b) when no two or more signals received by said channels have substantially the same amplitude, outputing one of said signals received by one of said channels, whose amplitude is intermediate of the other two signals received by each of the other two channels.
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Abstract
Process and apparatus for reduced noise reception of frequency modulated electromagnetic signal transmissions employing at least three spatially displaced receiving channels. The received at least three signals are continuously sampled at a high frequency, and the sampled signals are compared to each other. As a result of this comparison one sampled signal is selected and used for the reconstruction of the original transmission. The process is repeated for each sampling.
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Citations
16 Claims
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1. Apparatus for receiving an analog information carrying signal having an amplitude, the information carrying signal having information and noise components, the information component also having frequencies associated with it, the apparatus comprising:
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(1) three discrete signal receiving channels for receiving the information carrying signal; (2) logic means connected to said signal receiving channels for comparing the amplitude of the information carrying signal received by each of the receiving channels and for; (a) when two or more of said signals received by said channels have substantially equal amplitudes, outputing any one of said two or more signals; (b) when no two or more signals received by said channels have substantially the same amplitude, outputing one of said signals received by one of said channels, whose amplitude is intermediate of the other two signals received by each of the other two channels. - View Dependent Claims (5, 15, 16)
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2. A method for receiving an analog information carrying signal having an amplitude, the information carrying signal having information and noise components, the information component also having frequencies associated with it, the method comprising the steps of:
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(1) receiving the analog information carrying signal, over "n" discrete channels, wherein "n" is an integer greater than 3, and producing n received signals each having an amplitude; (2) comparing the amplitude of the n received signals; (3) determining if there are any received signals having the same amplitude and if not, determining which two of the n received signals amplitudes have the least difference; (4) outputing any one of any received signals having the same amplitudes, and if no received signals have the same amplitude, outputing the received signal having an amplitude equal to a preselected one of the two received signals having the least difference in amplitudes; (5) repeating steps (2) through (4) at a frequency exceeding the highest frequency in the information signal. - View Dependent Claims (6, 7, 12, 13, 14)
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3. A method for receiving an analog information carrying signal having an amplitude, the information carrying signal having information and noise components, the information component also having frequencies associated with it, the method comprising the steps of:
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(1) receiving the analog information carrying signal, over 3 discrete channels, and producing 3 received signals each having an amplitude; (2) comparing the amplitudes of the 3 received signals; (3) determining if there are any received signals having the same amplitude and if not, determining which of the received signals has an amplitude which is intermediate to the other amplitudes (4) outputing any one of any received signals having the same amplitudes, and if no received signals have the same amplitude, outputing the received signal having the intermediate amplitude (5) repeating steps (2) through (4) at a frequency exceeding the highest frequency in the information signal. - View Dependent Claims (8)
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4. Apparatus for receiving an analog information carrying signal having an amplitude, the information carrying signal having information and noise components, the information component also having frequencies associated with it, the apparatus comprising:
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(1) "n" discrete signal receiving channels, wherein "n" is an integer greater than 3; (2) logic means connected to each of said "n" discreet signal receiving channels for comparing the amplitude of the information carrying signal received by each of the "n" receiving channels and for, (a) determining if there are any received signals having the same amplitude and if not, determining which two of the n received signals amplitudes have the least difference; and (b) outputing any one of any received signals having the same amplitudes, and if no received signals have the same amplitude, outputing the received signal having an amplitude equal to a preselected one of the two received signals having the least difference in amplitudes. - View Dependent Claims (9, 10, 11)
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Specification