Communications Technologies
First Claim
Patent Images
1. A short range wireless communications method, the method comprising:
- providing a carrier signal;
imposing a phase modulation on the carrier signal to create a modulated signal;
providing the modulated signal to a wireless communications device;
wherein the phase modulation on the carrier signal is in accordance with a phase deviation where the phase deviation is in accordance with a data signal.
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Abstract
A wireless communications device (124) including a first antenna (138) and oscillator means (140) for providing a carrier signal (110). There is further provided modulation means (142) for imposing a low level phase modulation on the carrier signal in accordance with a data signal to create a modulated signal, the modulation means (142) also for providing the modulated signal to the first antenna (138) for transmission. An exemplary application of the present invention is in respect of document management systems and methods of identification.
41 Citations
103 Claims
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1. A short range wireless communications method, the method comprising:
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providing a carrier signal; imposing a phase modulation on the carrier signal to create a modulated signal; providing the modulated signal to a wireless communications device; wherein the phase modulation on the carrier signal is in accordance with a phase deviation where the phase deviation is in accordance with a data signal. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 95, 96, 99, 102)
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2. A method of short range wireless communications, the method including:
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providing a carrier signal; imposing a phase modulation on the carrier signal, in accordance with a data signal containing data, to create a modulated signal; and transmitting the modulated signal from a first wireless communications device to a second wireless communications device, the second wireless communications device having means for determining the data contained within the data signal, from the modulated signal.
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3. A method of near field communications, the method including:
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providing a carrier signal; imposing a low level phase modulation on the carrier signal, in accordance with a data signal containing data, to create a modulated signal; transmitting the modulated signal from a first wireless communications device; and controlling the modulated signal transmitted in order that the data contained within the data signal is not able to be extracted, due to noise, by a second wireless communications device when outside a 0.2 m radius.
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4. A method of demodulating a modulated signal received by a wireless communications device and deriving therefrom a data signal, the method comprising the steps of:
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receiving the modulated signal; producing a first signal being a local oscillator signal; demodulating the modulated signal using the local oscillator signal to obtain an indicative data signal.
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5. A method of demodulating a modulated signal received by a wireless communications device and deriving therefrom a data signal, the method comprising the steps of:
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receiving the modulated signal and inducing into an antenna of the device, an antenna voltage signal, amplifying the antenna signal, providing a portion of the amplified signal to a phase locked loop to filter off sidebands and create a first signal, demodulating the modulated signal using the first signal to obtain an indicative data signal; and filtering the demodulated signal to provide the data signal. - View Dependent Claims (47, 48, 49, 50, 51, 52, 53, 54)
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6. A method of demodulating a modulated signal received by a wireless communications device and deriving therefrom a data signal, the method comprising the steps of:
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receiving the modulated signal and inducing into an antenna of the device, an antenna voltage signal, amplifying the antenna signal, passing another portion of the amplified signal through a delay means and creating a first signal, demodulating the modulated signal using the first signal to obtain an indicative data signal, and filtering the demodulated signal to provide the data signal.
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7. A short range wireless communications method between a plurality of wireless communications devices in an area network, the method comprising:
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providing a carrier signal; imposing a phase modulation on the carrier signal to create a modulated signal; providing the modulated signal to a first one of the wireless communications devices;
the phase modulation on the carrier signal being in accordance with a phase deviation where the phase deviation is in accordance with a data signal; and
;thereafter transmitting the modulated signal from the first wireless communications device and receiving the signal at a second one of the wireless communications devices.
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55. A wireless communications device including:
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a first antenna oscillator means for providing a carrier signal; and modulation means for imposing a low level phase modulation on the carrier signal in accordance with a data signal to create a modulated signal, the modulation means also for providing the modulated signal to the first antenna for transmission. - View Dependent Claims (61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 97)
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56. A wireless communications transmitter adapted to send a short range wireless communication signal to a wireless communications device in an area network, comprising:
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a first antenna; oscillator means for providing a carrier signal; modulation means for imposing phase modulation on the carrier signal to create a modulated signal; and
for providing the modulated signal to the first antenna;characterized in that the modulation means imposes phase modulation on the carrier signal in accordance with a phase deviation where the phase deviation is in accordance with a data signal.
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57. A wireless communications receiver adapted to receive data from a second wireless communications device, the first wireless communications device comprising:
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a second antenna, and receiver means, adapted to derive a second signal indicative of a data signal received by the second antenna in the form of a modulated signal formed by imposing a low level phase modulation on a carrier signal in accordance with the data signal and transmitting the modulated signal from a first antenna. - View Dependent Claims (89, 90, 91, 92)
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58. A wireless communications receiver adapted to receive a short range wireless communication in an area network, the device comprising:
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an antenna adapted to receive the modulated signal and, in response thereto, produce a first signal, receiver means adapted to derive from the first signal, a local oscillator signal used to demodulate the first signal and obtain an indicative data signal.
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59. A wireless communications device for an area network adapted to receive a modulated signal and derive therefrom a data signal, the device comprising:
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an antenna adapted to receive the modulated signal and, in response thereto, produce a first signal, receiver means adapted to derive from the first signal, a local oscillator signal used to demodulate the first signal and obtain an indicative data signal.
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60. A device for demodulating a modulated signal received by the device and deriving therefrom a data signal, the device comprising:
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means for receiving the modulated signal and inducing into an antenna of the device, an antenna voltage signal, means for amplifying the antenna signal means for providing a portion of the amplified signal to a phase locked loop to filter off sidebands and create a first signal means for passing another portion of the amplified signal through a delay means and creating a second signal means for filtering the first and second signals to provide indicative data.
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93. (canceled)
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94. (canceled)
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98. A method of determining reproduction criteria for use in a document management apparatus or system, the method comprising:
- associating a radio frequency device with a reproducible article;
receiving information corresponding to the radio frequency device; and
determining reproduction criteria based on the information. - View Dependent Claims (100)
- associating a radio frequency device with a reproducible article;
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101. A device adapted to determine reproduction criteria for use in a document management apparatus, the device comprising:
- a receiver for receiving information corresponding to a radio frequency device that is associated with a reproducible article; and
logic means for determining reproduction criteria based on the information. - View Dependent Claims (103)
- a receiver for receiving information corresponding to a radio frequency device that is associated with a reproducible article; and
Specification