Human body communication interference rejection system
AssigneePurdue Research Foundation
InventorShreyas Sen
Life of this patent
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Abstract
A communication interference rejection system, comprising a dual data rate (DDR) receiver operatively connected to a device connected to a body of a user. The DDR receiver is configured to receive a signal transmitted through the body of the user, with the signal comprising a relatively substantially small constant amplitude component and a relatively large sinusoidal or modulated interference component, said interference component due to human body antenna effect. The receiver integrates the signal and sample at a sampling time, with the sampling time defined as Ts=n/Finterference, wherein Finterference is the frequency of the modulated interference component and n is an integer.
Claims10
A communication interference rejection system comprising:
- a dual data rate (DDR) receiver operatively connected to a device connected to a body of a user, the DDR receiver configured to:
- a. receive a signal transmitted through the body of the user, the signal comprising a relatively small constant amplitude component and a relatively large sinusoidal or modulated interference component, said interference component due to human body antenna effect;
- b. integrate the signal and sample at a sampling time, the sampling time defined as Ts=n/Finterference, wherein Finterference is the frequency of the modulated interference component and n is an integer, leading to a suppressed contribution from an integrated interference;
- and
- c. to handle variable Finterference>1/Tb, wherein Tb is the bit-period, integrate the signal and sample at a sampling time Tint=n/Finterference<Tb, thereby rejecting arbitrary interference which is an even non-integer multiple of 1/Tb;
- and
- interference period detection circuitry operatively connected to the DDR receiver that sets Tint=n/Finterference<Tb.
Dependencies are inferred from the claim text.