Panasonic Introduces World’s First*1 Near Field Communication Technology Using Wavelet OFDM

Overview diagram of the PaWalet Link

Panasonic Corporation has announced that it has developed a secure near field communication technology termed as “PaWalet Link”) using a loop antenna by applying Wavelet OFDM*2 to a communication method using a magnetic field. With “PaWalet Link” it is possible to limit the communication range from a few millimeters to tens of centimeters. This technology can control the communication range by controlling the size of the loop antenna and the transmission power of the communication device. The frequency can be limited by selecting the mode/channel.

In the communication environment of the IoT/ DX / GX era, wireless technology will be used in the future, and the number of connected terminals is expected to increase. As a result, interference among devices is regarded as a problem, and communication methods that can reduce interference are desired.

With the newly developed technology, the range of communication can be easily controlled by applying a loop antenna to wavelet OFDM that so far and communicating with a magnetic field. The wavelet OFDM has functions necessary for robust communication such as error correction, diversity mode, transmission line estimation technology, and encryption, and also includes interference avoidance function by carrier sense using CSMA / CA*3.

PaWalet Link also has multiple modes and channels, allowing multiple channels to be formed to avoid interference, such as a wireless LAN. It is ideal in environments where the distance from neighboring devices is extremely close and you do not want to interfere with each other.

A specific image of utilization is charging to a mobile using wireless power transmission. During the charging process, PaWalet Link is used to automatically connect the mobile to the network when the mobile stops in the parking space. 

Main features

  • ・It is a contactless communication connection using near field wireless communication technology, maintenance performance is improved by replacing the conventional connector connection.
  • ・In addition to being able to identify the communication range and target, it is also equipped with an encryption function. 
  • ・Since interference can be avoided by multiple modes and channel settings.

PaWalet Link can also be used as a communication method underwater, so new developments that take advantage of the above features are expected for Beyond5G and others. 

Specifications of PaWalet Link

Communication methods wavelet OFDM

Maximum communication bandwidth~110 MHz

Maximum speed (PHY)1 Gbps

Maximum communication distanceTens of ‘cm’

Maximum number of modes and channels9 modes / 15 channels

While various devices in society will support IoT/DX/GX and the development of wireless communication technologies such as 5G and high-speed optical access will be accelerated.

By applying The Pawlet Link, which has these characteristics, Panasonic provides solutions that can respond immediately to the needs of the IoT/ DX / GX era, such as IP networking, high speed, and security.

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