Panasonic Develops Millimeter Wave Transceiver Chipset with Buil

Panasonic Develops Millimeter Wave Transceiver Chipset with Built-In
Self-Calibration for Mobile Devices 
Tokyo, Feb 20, 2013 - (JCN Newswire) -  Panasonic Corporation has developed
technologies to reduce performance errors and maximize the transistor
performance in chips for multi-gigabit wireless utilizing the 60GHz wireless
band, which is expected to be the future of high-speed wireless communication.
The transceiver LSI also features an integrated miniaturized module including
an antenna, which contributes to the realization of stable high speed wireless
communication for mobile devices. 
The chipset incorporates built-in self-calibration to compensate for
performance errors, improving the modulation accuracy more than 1.5 times. This
makes it possible to reduce the circuit design margin, leading to the
improvement of the stability of wireless communications with less than 1W power
consumption. By integrating the transceiver LSI into the miniaturized module,
the chipset can be implemented in mobile devices, enabling the easy exchange of
the rich content, such as high definition videos, among mobile devices
The developed technology has the following features: 
1. Incorporates built-in self-calibration to compensate for performance errors
in millimeter wave wireless circuits. 
2. Employs signal processing circuits which equalize the distorted received
signal with more than 50% power reduction compared to the conventional
3. Integrates the transceiver LSI in the miniaturized module including the
transmit antenna and the receive antenna (size: 10mm x 10mm). 
This development is based on the following new technologies. 
1. Built-in self-calibration for the transmitter and the receiver which reuses
existing circuit blocks to minimize the chip area. 
2. Unique low power frequency domain equalizer which significantly reduces
circuit size by using a newly proposed signal processing algorithm. 
Panasonic holds 48 Japanese patents and 46 overseas patents, including pending
applications, for this development. 
This result was supported in part by the "research and development
project for expansion of radio spectrum resources" of The Ministry of
Internal Affairs and Communications, Japan. A part of this release has been
presented at IEEE International Solid-State Circuits Conference 2013 at San
Francisco on February 20th. Fast File Transfer Demo has also been given at
Industrial Demo Session at the conference on the same day. 
More on the Technology 
1. Built-In Self-calibration which reuses multiple circuit blocks required for
compensating performance variations 
The chipset employs the transmitter calibration which automatically detects
the frequency dependent amplitude errors in the transmitter path and
compensates for the errors by the baseband signal processing. It also
integrates the auto calibration to compensate the quadrature error3 for
minimizing the modulation/demodulation performance as well as the auto
calibration to compensate for the error in the transmit power control. With
those technologies, the chipset has successfully minimized performance
degradations due to process and supply voltage variations, which have been a
serious problem for mass production especially at millimeter wave frequencies.
The proposed calibration reuses existing circuit blocks to minimize the chip
area. This technology improves yields for mass production and contributes to
lower the chip cost. 
2. Low power frequency domain equalizer which employs the newly proposed
signal processing algorithm to reduce circuit size significantly 
By estimating the channel characteristics, this block equalizes the frequency
distortion due to the multipath4 delay spread. This signal processing normally
requires huge computation, which makes it difficult to implement in the mobile
devices. Panasonic has developed the unique signal processing algorithm to
shrink the size of FFT and IFFT5, resulting in the significant reduction in the
computational complexity. Combined with the optimized algorithms for selecting
operating blocks, the proposed approach achieved more than 50% power savings
compared to the conventional one. 
(1) WiGig (Wireless Gigabit Alliance): Established in May 2009, this industry
group (consisting of various PC, Home appliances, mobile devices as well as
semiconductor companies) has been working actively in the 60 GHz area to create
a standard for high speed wireless communication targeting above 1 Gbps,
providing interoperability verification, as well as making contribution to the
IEEE802.11ad standardization. Its home page is:
(2) IEEE802.11ad: The IEEE802.11 is a Working Group that defines a set of
standards for Wireless Local Area Network. The Task Group IEEE802.11ad has
developed a standard specification for next generation high speed communication
of above 1Gbps in the 60GHz frequency band.
(3) Quadrature Error: The amplitude and phase error between 0 and 90 degree
signals used for digital modulation and demodulation.
(4) Multipath: The propagation phenomenon that results in radio signals
reaching to the receiver by two or more paths due to the reflection by objects
such as a wall and a floor.
(5) FFT, IFFT: Abbreviation of the Fast Fourier Transform, which is the widely
used algorithm to convert the digital signals from a time domain to a frequency
domain. The reverse conversion is called IFFT (Inverse FFT). The computational
complexity increases rapidly as the data size becomes larger. 
About Panasonic 
Panasonic Corporation is a worldwide leader in the development and manufacture
of electronic products in three business fields, consumer, components &
devices, and solutions. Based in Osaka, Japan, the company recorded
consolidated net sales of 7.85 trillion yen for the year ended March 31, 2012.
Panasonic's stock is listed on the Tokyo, Osaka, Nagoya and New York
(NYSE:PC) Stock Exchanges. The company has the vision of becoming the No. 1
Green Innovation Company in the Electronics Industry by the 100th year of its
founding in 2018. For more information on Panasonic, its brand and commitment
to sustainability, visit the company's website at 
Panasonic Corporation
Tokyo Public Relations Office
Tel: +81-3-3574-5664
Fax: +81-3-3574-5699 
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