The evolution system of battery power device. In this system there will be no source of power.

1. Ambient Backscatter
Communication
The Future of Wireless Communication

2. Team Members
 Nishan Ahmed
 Christopher Mozumder
 Raiysa Siddiquee
 Kaniz Farjana Urme

3. Introduction to Ambient Backscatter
01
Design Challenges in Ambient
Backscatter02
Ambient Backscatter Design
03
Agenda
The Future Applications of Ambient
Backscatter04

4. What is Ambient Backscatter
 University of Washington researchers create this new system, which absorbs all the
different kinds of transmission all around us in the air, from radio waves, TV and cell signals to
mobile networks and WIFI, and transform them to both a source of electricity and a medium for
battery free communication.
 A new system of wireless allows device to interact and send data from one to another without
having any source power.
 The system is based on the new ambient backscatter technology, which practically harvests all
the existing signals in the air and convert them into power for communication device.

7. Design
Challenges in
Ambient
Backscatter

8.  Since backscattered signals are weak, traditional backscatter uses a constant signal to
facilitate the detection of small level changes. Ambient backscatter uses uncontrollable RF
signals that already have information encoded in them. Hence it requires a different
mechanism to extract the backscattered information.
 Traditional backscatter receivers rely on power-hungry components such as oscillators and
ADCs and decode the signal with relatively complex digital signal processing techniques.
These techniques are not practical for use in a battery-free receiver.
 Ambient backscatter lacks a centralized controller such as an RFID reader to coordinate all
communications. Thus, it must operate a distributed multiple access protocol and develop
functionalities like carrier sense that are not available in traditional backscattering devices.

9. System Diagram

10. The transmitter, receiver, and the harvester are all
connected to a single antenna and use the same RF
signals. The transmitter and receiver communicate by
backscattering the ambient signals. The harvester
collects energy from the ambient signals and uses it
to provide the small amount of power required for
communication and to operate the sensors and the
digital logic unit.

11. Future
Applications
of Ambient
Backscatter

12. Medical Application
Ambient Backscatter has rich
application opportunities in
healthcare because of its
battery-free operation and small
form-factor. An Ambient
Backscatter enabled on body
and battery-less temperature
sensor can be designed as a
comfortable wearable gadget.

15. THANK YOU