全双工无线通信FullDulexWirelessPPT课件
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Can wireless nodes transmit and receive at the same time and on the same channel?
RF model of a full-duplex system
Why Is This Important?
Revolutionize the wireless world Double the spectral efficiency of every radio
in the world An economic value of trillions of Simplifiy spectrum management
Future work
"The bigger change will be developing new wireless standards for full-duplex. I expect people may start seeing this when carriers upgrade to 4.5G or 5G networks in just a few years.“-----Ashu Sabharwal
The Challenge in Achieving FullDuplex
The main challenge in achieving full-duplex is canceling the strong interference at the receive interface from the transmit interface of a node. Digital cancLeabharlann Baidullation techniques fail in trying to cancel this self-interference as the strength of the interference saturates the analog-to-digital converters.
Full Duplex Wireless cellular
Full Duplex Wireless doubles wireless capacity and reduces spectrum requirements for wireless solutions
Global Spectrum Harmonization
Can you hear me, boy?
TD
No, let’s speak in turns.
Hi, boy! FD
Frequency resources
Hi, girl!
Computer network
Wireless network
On the same frequency band In the same time slot
Full-Duplex Wireless communication
王亚飞 1130349096 陈思维 1130349076 上海交大无线通信技术研究所
Faster
Introduction
"It is generally not possible for radios to receive and transmit on the same frequency band because of the interference that results. Thus, bidirectional systems must separate the uplink and downlink channels into orthogonal signaling dimensions, typically using time or frequency dimensions."
How to do?
We send two signals such that they cancel each other at the receiving antenna - the device ears.
The canceling effect is purely local, so the other node can still hear what we're sending.
Full Duplex Wireless increases WiFi throughput and resiliency in dense and crowded environments without any change to existing clients
Thank you!
Facilitating global LTE roaming by enabling cellular infrastructure and mobile phones to support multiple frequencies and carrier aggregation
High Capacity Dense WiFi
Can wireless nodes transmit and receive at the same time and on the same channel?
RF model of a full-duplex system
Why Is This Important?
Revolutionize the wireless world Double the spectral efficiency of every radio
in the world An economic value of trillions of Simplifiy spectrum management
Future work
"The bigger change will be developing new wireless standards for full-duplex. I expect people may start seeing this when carriers upgrade to 4.5G or 5G networks in just a few years.“-----Ashu Sabharwal
The Challenge in Achieving FullDuplex
The main challenge in achieving full-duplex is canceling the strong interference at the receive interface from the transmit interface of a node. Digital cancLeabharlann Baidullation techniques fail in trying to cancel this self-interference as the strength of the interference saturates the analog-to-digital converters.
Full Duplex Wireless cellular
Full Duplex Wireless doubles wireless capacity and reduces spectrum requirements for wireless solutions
Global Spectrum Harmonization
Can you hear me, boy?
TD
No, let’s speak in turns.
Hi, boy! FD
Frequency resources
Hi, girl!
Computer network
Wireless network
On the same frequency band In the same time slot
Full-Duplex Wireless communication
王亚飞 1130349096 陈思维 1130349076 上海交大无线通信技术研究所
Faster
Introduction
"It is generally not possible for radios to receive and transmit on the same frequency band because of the interference that results. Thus, bidirectional systems must separate the uplink and downlink channels into orthogonal signaling dimensions, typically using time or frequency dimensions."
How to do?
We send two signals such that they cancel each other at the receiving antenna - the device ears.
The canceling effect is purely local, so the other node can still hear what we're sending.
Full Duplex Wireless increases WiFi throughput and resiliency in dense and crowded environments without any change to existing clients
Thank you!
Facilitating global LTE roaming by enabling cellular infrastructure and mobile phones to support multiple frequencies and carrier aggregation
High Capacity Dense WiFi