# US 10,873,354 B2 · System and method for signal interference rejection using human body communication

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,873,354 B2
- Document ID: US10873354B2
- Status: Granted
- Kind: B2
- Application number: 16/518,950
- Filed: 2019-07-22
- Published: 2020-01-23
- Granted: 2020-12-22
- Earliest claimed: 2018-07-20
- Assignees: Purdue Research Foundation
- Applicants: Purdue Research Foundation
- Inventors: Shreyas Sen; Shovan Maity
- Web page: https://patentgrep.com/patent/US10873354B2

## CPC

- H04B 1/12: Neutralising, balancing, or compensation arrangements
- H04B 1/123: {using adaptive balancing or compensation means (adaptive filter circuits and algorithms H03H)}
- H04B 1/0007: {wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage}
- H04B 1/109: {by improving strong signal performance of the receiver when strong unwanted signals are present at the receiver input}
- H04B 1/385: {Transceivers carried on the body, e.g. in helmets}
- H04B 13/005: {Transmission systems in which the medium consists of the human body}
- H04B 2001/3855: {carried in a belt or harness}
- H04B 2001/3861: {carried in a hand or on fingers}
- H04B: TRANSMISSION

## Abstract

A communication interference rejection system comprising a receiver operatively connected to a device connected to a body of a user. The receiver is configured to receive a signal transmitted through the body of the user, the signal comprising a data component and an interference component, the interference component due to human body antenna effect. The receiver is configured to integrate the signal using a relatively low-gain analog integrator and then digitally differentiate the output of said integration.

## Claims

### Claim 1

A communication interference rejection system comprising:
a receiver operatively connected to a device connected to a body of a user, the receiver configured to receive a signal transmitted through the body of the user, the signal comprising a data component and an interference component, said interference component due to human body antenna effect, said receiver configured to integrate the signal using a relatively high-gain analog integrator wherein the output of said integrator saturates to a rail-to-rail voltage to allow the receiver to decode the signal received from said integrator using a serial protocol, wherein the digital differentiator compares the difference between two consecutive samples output by the analog to digital converter.

### Claim 2 (depends on 1)

The system of claim 1, wherein the digital differentiator outputs a first logic value if the difference between the two consecutive samples is positive and outputs a second logic value if the difference between the two consecutive samples is negative.

### Claim 3 (depends on 2)

The system of claim 2, wherein the first logic value is 1 and the second logic value is 0.