Feb, 14 2018 13:54 JST

Source: NEC Corporation

NEC Develops Low-power Consumption Circuit Technologies for Compact Millimeter-Wave Radio Units

- Enabling greater installation flexibility -

TOKYO, Feb, 14 2018 - (JCN Newswire) - NEC Corporation (TSE: 6701) today announced it has reduced the size of the millimeter-wave radio units for fifth-generation (5G) mobile communications, and has developed low power consumption circuit technologies that improve installation flexibility.

5G is expected to enable large capacity communications that measure up to several tens of gigabits per second (Gbps) by taking advantage of wideband millimeter-wave technology. However, an increase in the power consumption of wireless circuits results in larger equipment due to the expanded size of the heat dissipation mechanisms. This poses a challenge as there is limited space for the installation of radio units.

Newly developed low-power circuit technologies reduce the overall power consumption of the millimeter-wave radio unit, leading to a smaller heat dissipation mechanism in the wireless circuit. This allows the body of the millimeter-wave radio unit to be as small as that of LTE radio units. As a result, it enables the millimeter-wave radio unit to be installed in places that are usually considered difficult, such as streetlights and telegraph poles, in addition to conventional building rooftops.

Major features of the technologies are shown below:

1. Reduces power consumption of millimeter-wave wideband amplifier to one fifth
NEC developed wide-band digital pre-distortion technology where a power amplifier's distortion outside an observation band is estimated and suppressed by using only in-band signals. This enables power amplifiers to operate with both high efficiency and low distortion, which conventional amplifiers cannot achieve. Consequently, this permits signal quality to be secured with low power consumption, while reducing power consumption of the amplifier to approximately one fifth when compared to conventional devices.
2. Reduces power consumption of analog wireless circuits to half
NEC applied a 1-bit digital transmitter(1), which eliminates the need for digital-to-analog converters, to a millimeter-wave wideband communication system, and successfully reduced the overall power consumption of analog wireless circuits to approximately half, compared to that of commercial products with digital-to-analog converters.

"NEC aims to see these technologies deployed with wireless base stations that contribute to the construction of 5G mobile networks throughout the world," said Yuichi Nakamura, General Manager, NEC System Platform Research Laboratories.

NEC will present these technologies at Mobile World Congress (MWC) 2018 in Barcelona, Spain, from Monday, February 26, 2018 to Thursday, March 1, 2018.

(1) 1-bit digital transmitter
http://www.nec.com/en/press/201406/global_20140602_02.html


About NEC Corporation
NEC Corporation is a leader in the integration of IT and network technologies that benefit businesses and people around the world. The NEC Group globally provides "Solutions for Society" that promote the safety, security efficiency and fairness of society. Under the company's corporate message of "Orchestrating a brighter world," NEC aims to help solve a wide range of challenging issues and to create new social value for the changing world of tomorrow. For more information, visit NEC at https://www.nec.com.


Contact:
NEC 
Seiichiro Toda         
[email protected] 
+81-3-3798-6511
Source: NEC Corporation
Sectors: Telecoms, Mobility/Wireless

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