US5684830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noise removing device and data communication apparatus using the same
Assignee: Sharp Corp
•
Filing: 1994-10-20
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Granted: 1997-11-04
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Expires: 2014-10-20
Abstract
Abstract The noise removing device is used in a data communication system utilizing a transmitting signal modulated by a data signal to be transmitted. The noise removing device includes a receiving section for receiving the transmitting signal, and converting it into an electric signal, so as to supply an input signal, an analog signal processing circuit for selectively passing the input signal in a first frequency range including a carrier frequency of the transmitting signal, thereby removing a first noise, for converting the passed signal into a digital signal, and for outputting the digital signal, and a digital signal processing circuit for sampling the digital signal, and for selectively passing the digital signal in a second frequency range including the carrier frequency based on a result of comparison of a pattern obtained by the sampling with a predetermined pattern, thereby removing a second noise.
Inventors
- 👤 Yuji Ichikawa
- 👤 Katsuya Nakagawa
- 👤 Akira Imai
- 👤 Hiroshi Uno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:09
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/10
Claims Analysis
Total Claims: 54
Claim 1
Independent Claim
139 words
A noise removing device in a data communication system which uses a transmitting signal modulated by a data signal to be transmitted, the noise removing device comprising: receiving means for receiving the transmitting signal, and converting it into an electric signal, so as to supply an input signal; analog signal processing means for selectively passing the input signal in a first frequency range including a carrier frequency of the transmitting signal, thereby removing a first noise, for converting the passed signal into a digital signal, and for outputting the digital signal; and digital signal processing means for sampling he digital signal, and for selectively passing the digital signal in a second frequency range including the carrier frequency based on a result of comparison of a pattern obtained by the sampling with a predetermined pattern, thereby removing a second noise.
Claim 2
Dependent Claim
139 words
A noise removing device in a data communication system which uses a transmitting signal modulated by a data signal to be transmitted, the noise removing device comprising: receiving means for receiving the transmitting signal, and converting it into an electric signal, so as to supply an input signal; analog signal processing means for selectively passing the input signal in a first frequency range including a carrier frequency of the transmitting signal, thereby removing a first noise, for converting the passed signal into a digital signal, and for outputting the digital signal; and digital signal processing means for sampling he digital signal, and for selectively passing the digital signal in a second frequency range including the carrier frequency based on a result of comparison of a pattern obtained by the sampling with a predetermined pattern, thereby removing a second noise.
Claim 3
Dependent Claim
109 words
A noise removing device according to claim 1, wherein the analog signal processing means includes first filter means for selectively passing the input signal in the first frequency range and analog/digital converting means for converting the input signal passed through the first filter means into a digital signal, so as to output it, and wherein the digital signal processing means includes sampling means for sampling the digital signal output from the analog/digital converting means, comparing means for comparing the sampling pattern obtained by the sampling with the predetermined pattern, and second filter means for selectively passing the digital signal in the second frequency range based on the comparison result.
Claim 4
Dependent Claim
51 words
A noise removing device according to claim 2, wherein the digital signal processing means includes edge detecting means for detecting an edge of the digital signal output from the analog/digital converting means and for generating a detection signal, and wherein the sampling means performs the sampling based on the detection signal.
Claim 5
Dependent Claim
36 words
A noise removing device according to claim 1, wherein the first frequency range excludes a frequency range lower than a predetermined frequency, and the second frequency range excludes a frequency range higher than another predetermined frequency.
Claim 6
Dependent Claim
48 words
A noise removing device according to claim 4, wherein the data signal to be transmitted is a digital signal, the transmitting signal is a signal obtained by modulating the carrier by an ASK method, and the data communication system is a wireless communication system using an infrared ray.
Claim 7
Dependent Claim
19 words
A noise removing device according to claim 1, wherein the predetermined pattern is a waveform pattern of the carrier.
Claim 8
Dependent Claim
19 words
A noise removing device according to claim 1, wherein the data signal to be transmitted is a digital signal.
Claim 9
Dependent Claim
24 words
A noise removing device according to claim 1, wherein the transmitting signal is a signal obtained by modulating the carrier by an ASK method.
Claim 10
Dependent Claim
18 words
A noise removing device according to claim 1, wherein the data communication system is a wireless communication system.
Claim 11
Dependent Claim
21 words
A noise removing device according to claim 9, wherein a communication media of the data communication system is an infrared ray.
Claim 12
Dependent Claim
151 words
A receiver in a data communication system which uses a transmitting signal modulated by a data signal to be transmitted, the receiver comprising: receiving means for receiving the transmitting signal, and converting it into an electric signal, so as to supply an input signal; analog signal processing means for selectively passing the input signal of a first frequency range including a carrier frequency of the transmitting signal, thereby removing a first noise, for converting the passed signal into a digital signal, and for outputting the digital signal; digital signal processing means for sampling the digital signal, and for selectively passing the digital signal in a second frequency range including the carrier frequency based on a result of comparison of a pattern obtained by the sampling with a predetermined pattern, thereby removing a second noise; and means for demodulating the data signal from the output signal of the digital signal processing means.
Claim 13
Dependent Claim
151 words
A receiver in a data communication system which uses a transmitting signal modulated by a data signal to be transmitted, the receiver comprising: receiving means for receiving the transmitting signal, and converting it into an electric signal, so as to supply an input signal; analog signal processing means for selectively passing the input signal of a first frequency range including a carrier frequency of the transmitting signal, thereby removing a first noise, for converting the passed signal into a digital signal, and for outputting the digital signal; digital signal processing means for sampling the digital signal, and for selectively passing the digital signal in a second frequency range including the carrier frequency based on a result of comparison of a pattern obtained by the sampling with a predetermined pattern, thereby removing a second noise; and means for demodulating the data signal from the output signal of the digital signal processing means.
Claim 14
Dependent Claim
107 words
A receiver according to claim 11, wherein the analog signal processing means includes first filter means for selectively passing the input signal in the first frequency range and analog/digital converting means for converting the input signal passed through the first filter means into a digital signal, so as to output it, and wherein the digital signal processing means includes sampling means for sampling the digital signal output from the analog/digital converting means, comparing means for comparing the sampling pattern obtained by the sampling with the predetermined pattern, and second filter means for selectively passing the digital signal in the second frequency range based on the comparison result.
Claim 15
Dependent Claim
49 words
A receiver according to claim 12, wherein the digital signal processing means includes edge detecting means for detecting an edge of the digital signal output from the analog/digital converting means and for generating a detection signal, and wherein the sampling means performs the sampling based on the detection signal.
Claim 16
Dependent Claim
34 words
A receiver according to claim 11, wherein the first frequency range excludes a frequency range lower than a predetermined frequency, and the second frequency range excludes a frequency range higher than another predetermined frequency.
Claim 17
Dependent Claim
46 words
A receiver according to claim 14, wherein the data signal to be transmitted is a digital signal, the transmitting signal is a signal obtained by modulating the carrier by an ASK method, and the data communication system is a wireless communication system using an infrared ray.
Claim 18
Dependent Claim
17 words
A receiver according to claim 11, wherein the predetermined pattern is a waveform pattern of the carrier.
Claim 19
Dependent Claim
17 words
A receiver according to claim 11, wherein the data signal to be transmitted is a digital signal.
Claim 20
Dependent Claim
22 words
A receiver according to claim 11, wherein the transmitting signal is a signal obtained by modulating the carrier by an ASK method.
Claim 21
Dependent Claim
16 words
A receiver according to claim 11, wherein the data communication system is a wireless communication system.
Claim 22
Dependent Claim
19 words
A receiver according to claim 19, wherein a communication media of the data communication system is an infrared ray.
Claim 23
Dependent Claim
71 words
A receiver according to claim 11, further comprising second analog signal processing means for, when the transmitting signal is a signal which is transmitted by a base-band transmission method, receiving the input signal and for amplifying the output signal so as to output a second digital signal, and second digital signal processing means for receiving the second digital signal and for decoding the second digital signal, thereby demodulating the transmitted signal.
Claim 24
Dependent Claim
54 words
A receiver according to claim 21, further comprising means for selectively outputting one of the output of the demodulating means and the output of the second digital signal processing means, based on whether the transmitted signal is a carrier signal modulated by the data signal or a base-band transmission signal of the data signal.
Claim 25
Dependent Claim
50 words
A receiver according to claim 21, further comprising means for selectively inputting the second digital signal into the second digital signal processing means by controlling the second digital signal output from the second analog signal processing means in accordance with the output signal of the first digital signal processing means.
Claim 26
Dependent Claim
39 words
A receiver according to claim 23, wherein the selectively inputting means suppresses the input of the second digital signal into the second digital signal processing means, when the input signal is a carrier signal modulated by the data signal.
Claim 27
Dependent Claim
107 words
A receiver according to claim 21, wherein the analog signal processing means includes first filter means for selectively passing the input signal in the first frequency range and analog/digital converting means for converting the input signal passed through the first filter means into a digital signal, so as to output it, and wherein the digital signal processing means includes sampling means for sampling the digital signal output from the analog/digital converting means, comparing means for comparing the sampling pattern obtained by the sampling with the predetermined pattern, and second filter means for selectively passing the digital signal in the second frequency range based on the comparison result.
Claim 28
Dependent Claim
49 words
A receiver according to claim 25, wherein the digital signal processing means includes edge detecting means for detecting an edge of the digital signal output from the analog/digital converting means and for generating a detection signal, and wherein the sampling means performs the sampling based on the detection signal.
Claim 29
Dependent Claim
34 words
A receiver according to claim 21, wherein the first frequency range excludes a frequency range lower than a predetermined frequency, and the second frequency range excludes a frequency range higher than another predetermined frequency.
Claim 30
Dependent Claim
46 words
A receiver according to claim 27, wherein the data signal to be transmitted is a digital signal, the transmitting signal is a signal obtained by modulating the carrier by an ASK method, and the data communication system is a wireless communication system using an infrared ray.
Claim 31
Dependent Claim
17 words
A receiver according to claim 21, wherein the predetermined pattern is a waveform pattern of the carrier.
Claim 32
Dependent Claim
17 words
A receiver according to claim 21, wherein the data signal to be transmitted is a digital signal.
Claim 33
Dependent Claim
22 words
A receiver according to claim 21, wherein the transmitting signal is a signal obtained by modulating the carrier by an ASK method.
Claim 34
Dependent Claim
16 words
A receiver according to claim 21, wherein the data communication system is a wireless communication system.
Claim 35
Dependent Claim
19 words
A receiver according to claim 32, wherein a communication media of the data communication system is an infrared ray.
Claim 36
Dependent Claim
128 words
A noise removing method in a data communication system which uses a transmitting signal modulated by a data signal to be transmitted, the noise removing method comprising: receiving the transmitting signal, and converting it into an electric signal, so as to generate an input signal; selectively passing said input signal in a first frequency range including a carrier frequency of the transmitting signal by processing the input signal through an analog signal processing, thereby removing a first noise; converting the input signal to a digital input signal; and selectively passing the digital input signal in a second frequency range including the carrier frequency based on a result of comparison of a pattern obtained by sampling the digital input signal with a predetermined pattern, thereby removing a second noise.
Claim 37
Dependent Claim
128 words
A noise removing method in a data communication system which uses a transmitting signal modulated by a data signal to be transmitted, the noise removing method comprising: receiving the transmitting signal, and converting it into an electric signal, so as to generate an input signal; selectively passing said input signal in a first frequency range including a carrier frequency of the transmitting signal by processing the input signal through an analog signal processing, thereby removing a first noise; converting the input signal to a digital input signal; and selectively passing the digital input signal in a second frequency range including the carrier frequency based on a result of comparison of a pattern obtained by sampling the digital input signal with a predetermined pattern, thereby removing a second noise.
Claim 38
Dependent Claim
133 words
A noise removing method in a data communication system which uses a transmitting signal modulated by a data signal to be transmitted, the noise removing method comprising the steps of: receiving the transmitting signal, and converting it into an electric signal, so as to generate an input signal; selectively passing the input signal in a first frequency range including a carrier frequency of the transmitting signal by processing the input signal through an analog signal processing, thereby removing a first noise; converting the input signal which is selectively passed into a digital signal; sampling the digital signal; comparing the pattern obtained by the sampling with a predetermined pattern; and selectively passing the digital signal in a second frequency range including the carrier frequency based on the comparison result, thereby removing a second noise.
Claim 39
Dependent Claim
133 words
A noise removing method in a data communication system which uses a transmitting signal modulated by a data signal to be transmitted, the noise removing method comprising the steps of: receiving the transmitting signal, and converting it into an electric signal, so as to generate an input signal; selectively passing the input signal in a first frequency range including a carrier frequency of the transmitting signal by processing the input signal through an analog signal processing, thereby removing a first noise; converting the input signal which is selectively passed into a digital signal; sampling the digital signal; comparing the pattern obtained by the sampling with a predetermined pattern; and selectively passing the digital signal in a second frequency range including the carrier frequency based on the comparison result, thereby removing a second noise.
Claim 40
Dependent Claim
40 words
A noise removing method according to claim 35, further comprising a step of generating a detection signal by detecting an edge of the digital signal, wherein in the sampling step, the digital signal is sampled based on the detection signal.
Claim 41
Dependent Claim
36 words
A noise removing method according to claim 35, wherein the first frequency range excludes a frequency range lower than a predetermined frequency, and the second frequency range excludes a frequency range higher than another predetermined frequency.
Claim 42
Dependent Claim
48 words
A noise removing method according to claim 37, wherein the data signal to be transmitted is a digital signal, the transmitting signal is a signal obtained by modulating the carrier by an ASK method, and the data communication system is a wireless communication system using an infrared ray.
Claim 43
Dependent Claim
28 words
A noise removing method according to claim 35, wherein in the comparing step, the pattern obtained by the sampling is compared with a waveform pattern of the carrier.
Claim 44
Dependent Claim
19 words
A noise removing method according to claim 35, wherein the data signal to be transmitted is a digital signal.
Claim 45
Dependent Claim
24 words
A noise removing method according to claim 35, wherein the transmitting signal is a signal obtained by modulating the carrier by an ASK method.
Claim 46
Dependent Claim
18 words
A noise removing method according to claim 35, wherein the data communication system is a wireless communication system.
Claim 47
Dependent Claim
21 words
A noise removing method according to claim 42, wherein a communication media of the data communication system is an infrared ray.
Claim 48
Dependent Claim
141 words
A receiving method in a data communication system which uses a transmitting signal modulated by a data signal to be transmitted, the receiving method comprising the steps of: receiving the transmitting signal, and converting it into an electric signal, so as to generate an input signal; selectively passing the input signal in a first frequency range including a carrier frequency of the transmitting signal, thereby removing a first noise; converting the input signal which is selectively passed into a digital signal; sampling the digital signal; comparing a pattern obtained by the sampling with a predetermined pattern; selectively passing the digital signal in a second frequency range including the carrier frequency based on the comparison result, thereby removing a second noise; and demodulating the digital signal from which the first and second noises are removed so as to obtain the data signal.
Claim 49
Dependent Claim
141 words
A receiving method in a data communication system which uses a transmitting signal modulated by a data signal to be transmitted, the receiving method comprising the steps of: receiving the transmitting signal, and converting it into an electric signal, so as to generate an input signal; selectively passing the input signal in a first frequency range including a carrier frequency of the transmitting signal, thereby removing a first noise; converting the input signal which is selectively passed into a digital signal; sampling the digital signal; comparing a pattern obtained by the sampling with a predetermined pattern; selectively passing the digital signal in a second frequency range including the carrier frequency based on the comparison result, thereby removing a second noise; and demodulating the digital signal from which the first and second noises are removed so as to obtain the data signal.
Claim 50
Dependent Claim
58 words
A receiving method according to claim 44, further comprising the steps of: when the transmitting signal is a signal which is transmitted by a base-band transmission method, amplifying the input signal through an analog signal processing, thereby generating a second digital signal; and decoding the second digital signal through a digital signal processing, thereby demodulating the transmitting signal.
Claim 51
Dependent Claim
60 words
A receiving method according to claim 45, further comprising a step of selecting one of the signal from which the first and second noises are removed and the signal obtained by decoding the second digital signal, based on whether the transmitted signal is a carrier signal modulated by the data signal or a base-band transmission signal of the data signal.
Claim 52
Dependent Claim
35 words
A receiving method according to claim 45, further comprising a step of suppressing the step of decoding the second digital signal in accordance with a value of the data signal demodulated in the demodulating step.
Claim 53
Dependent Claim
35 words
A receiving method according to claim 47, wherein, in the suppressing step, the step of decoding the second digital signal is suppressed when the transmitted signal is a carrier signal modulated by the data signal.
Claim 54
Dependent Claim
55 words
A receiving method according to claim 45, further comprising a step of selecting one of the step of removing the first noise and the step of generating the second digital signal, based on whether the transmitted signal is a carrier signal modulated by the data signal or a base-band transmission signal of the data signal.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2000-11-03 | 2001-05-05 | 2001-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-11-03 | 2005-05-05 | 2005-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-11-03 | 2009-05-05 | 2009-11-04 | $7700.00 | Window Closed / Lapsed |