Body coupled communication device with synchronization
First Claim
1. A body-coupled communication device for receiving signals via a body transmission channel, the device comprising:
- at least two couplers configured to receive a body-coupled signal from an other body-coupled communication device over the body transmission channel, the body transmission channel being formed by a body of a user when the body is in a direct vicinity of the couplers;
a synchronization indicator configured to store a synchronization level between the device and the other device; and
a band-pass filter configured to filter the body-coupled signal depending on the synchronization level, the band-pass filter configured to allow passage of frequencies in a frequency interval around a tunable filter frequency, wherein the frequency interval is narrow when the synchronization level is high and wherein the frequency interval is broad when the synchronization level is low.
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Accused Products
Abstract
A body-coupled communication device (201) adapted to receive signals via a body transmission channel (160), the first device comprising couplers (102) arranged to receive a body-coupled signal, a synchronization-indicator (272) to storing a level of synchronization between the first device and a second device, and a band-pass filter (250) arranged to filter the received body-coupled signal depending on the synchronization level, the band-pass filter being arranged to allow passage of frequencies in a frequency-interval around a tunable filter frequency, wherein the frequency-interval is narrow if the synchronization-level is high and wherein the frequency-interval is broad if the synchronization-level is low.
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Citations
13 Claims
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1. A body-coupled communication device for receiving signals via a body transmission channel, the device comprising:
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at least two couplers configured to receive a body-coupled signal from an other body-coupled communication device over the body transmission channel, the body transmission channel being formed by a body of a user when the body is in a direct vicinity of the couplers; a synchronization indicator configured to store a synchronization level between the device and the other device; and a band-pass filter configured to filter the body-coupled signal depending on the synchronization level, the band-pass filter configured to allow passage of frequencies in a frequency interval around a tunable filter frequency, wherein the frequency interval is narrow when the synchronization level is high and wherein the frequency interval is broad when the synchronization level is low. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A body-coupled communication system comprising a first device and a second device,
the first device comprising: -
at least two couplers configured to receive a body-coupled signal from the second body-coupled communication device over a body transmission channel, the body transmission channel being formed by a body of a user when the body is in a direct vicinity of the couplers; a synchronization indicator configured to store a synchronization level between the first device and the second device; and a first band-pass filter configured to filter the body-coupled signal depending on the synchronization level, the first band-pass filter configured to allow passage of frequencies in a frequency interval around a tunable filter frequency, wherein the frequency interval is narrow when the synchronization level is high and wherein the frequency interval is broad when the synchronization level is low; the second device comprising; at least two other couplers configured to transmit the body-coupled signal to the first device over the body transmission channel, the other couplers being further configured to receive the body-coupled signal from the first device over the body transmission channel; a second band-pass filter configured to filter the body-coupled signal, the second band-pass filter being configured to allow passage of frequencies in a frequency interval around a tunable filter frequency; a signal generator configured to generate a synchronization signal having the synchronization frequency, and to transmit the synchronization signal to the first device; and a tuning circuit configured to tune the tunable filter frequency of the band-pass filter towards a frequency of the synchronization signal locally generated by the signal generator of the second device.
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13. A method for receiving signals by a device via a body transmission channel, the method comprising:
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receiving a body-coupled signal from an other device over the body transmission channel, the body transmission channel being formed by a body of a user; storing a synchronization level between the device and the other device, band-pass filtering the body-coupled signal depending on the synchronization level, the band-pass filtering being arranged to allow passage of frequencies in a frequency interval around a tunable filter frequency, wherein the frequency interval is narrow when the synchronization level is high and wherein the frequency interval is broad when the synchronization level is low.
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Specification