Method and apparatus for filtering unwanted noise while amplifying a desired signal
AssigneeTempo Research Corporation
InventorsPaul R. Siglinger, William C. Wood
Life of this patent
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Abstract
A method and an apparatus for detecting signals in an electromagnetically noisy environment by detecting electromagnetic signals comprising a noise signal and a known signal, and compressing the electromagnetic signal to thereby generate a compressed signal. The compressed signal is filtered to generate a filtered signal comprising substantially the known signal, and the filtered signal is expanded.
Claims58
A method for detecting a desired signal in an electromagnetically noisy environment, the method comprising:
- detecting electromagnetic signals comprising a noise signal and the desired signal;
- compressing the detected electromagnetic signals to generate a compressed signal;
- filtering the compressed signal to generate a filtered signal comprising substantially the desired signal;
- and
- expanding the filtered signal.
An apparatus for detecting a desired signal in electromagnetically noisy environments, the apparatus comprising:
- an antenna configured to detect electromagnetic signals comprising a noise signal and the desired signal;
- an electronic signal compressor electrically connected to the antenna and configured for compressing the electromagnetic signals to thereby generate a compressed signal;
- a bandpass filter connected to the compressor for receiving the compressed signal from the compressor and configured for generating a filtered signal comprising substantially the desired signal;
- and
- an electronic signal expandor connected to the bandpass filter and configured for expanding the filtered signal.
An apparatus for detecting a signal in an electromagnetically noisy environment, the apparatus comprising:
- a probe antenna configured to detect electromagnetic signals comprising a noise signal and the tone signal;
- a noise canceling antenna configured for detecting electromagnetic signals comprising substantially the noise signal;
- an amplifier connected probe antenna and noise canceling antenna, the amplifier being configured for inverting the signal detected by the noise canceling antenna, and outputting an amplified signal comprising the sum of the inverted signal and the signal detected by the probe antenna;
- an electronic signal compressor electrically connected to the amplifier for receiving the amplified signal, and configured for compressing the amplified signal to thereby generate a compressed signal;
- a bandpass filter connected to the compressor for receiving the compressed signal from the compressor and for substantially filtering out the noise signal and outputting a filtered signal comprising substantially the known signal and insubstantially the noise signal;
- an electronic signal expandor connected to the bandpass filter and configured for receiving the filtered signal and generating an expanded signal comprising substantially the known signal amplifying and attenuating substantially the noise signal of the filtered signal;
- and
- a speaker connected to the expandor for generating an audible sound indicative of the expanded signal.
A method for detecting a desired signal in an electromagnetically noisy environment, the method comprising:
- detecting electromagnetic signals comprising a noise signal and the desired signal;
- compressing the detected electromagnetic signals to generate a compressed signal;
- filtering the compressed signal to generate a filtered signal comprising substantially the desired signal.
A method for detecting a desired signal in an electromagnetically noisy environment, the method comprising:
- detecting electromagnetic signals comprising a noise signal and the desired signal;
- filtering the detected electromagnetic signals to generate a filtered signal comprising substantially the desired signal;
- and
- expanding the filtered signal.
A method for detecting a desired signal in an electromagnetically noisy environment, the method comprising:
- detecting with a first antenna electromagnetic signals comprising a noise signal and the desired signal;
- detecting with a second antenna electromagnetic signals comprising substantially the noise signal;
- and
- inverting the noise signal detected by the second antenna, and summing the inverted signal to the signal detected by the first antenna to generate a summed signal.
A method for detecting a desired signal in an electromagnetically noisy environment, the method comprising:
- detecting electromagnetic analog signal comprising a noise signal and the desired signal;
- converting the analog signal into a digital signal;
- compressing the digital signal using digital signal processing (DSP) to generate a compressed signal;
- filtering the compressed signal using DSP to generate a filtered signal comprising substantially the desired signal;
- expanding the filtered signal using DSP to generate an expanded digital signal;
- and
- converting the expanded digital signal to an analog signal.
A method for detecting a desired signal in an electromagnetically noisy environment, the method comprising:
- detecting electromagnetic analog signals comprising a noise signal and the desired signal;
- converting the analog signals into a digital signal;
- compressing the digital signal using digital signal processing (DSP) to generate a compressed signal;
- filtering the compressed signal using DSP to generate a filtered signal comprising substantially the desired signal.
A method for detecting a desired signal in an electromagnetically noisy environment, the method comprising:
- detecting electromagnetic analog signals comprising a noise signal and the desired signal;
- converting the analog signals into a digital signal;
- filtering the digital signal using digital signal processing (DSP) to generate a filtered signal comprising substantially the desired signal;
- and
- expanding the filtered signal using DSP.
Dependencies are inferred from the claim text.