Beyond 5G: Wireless Transceiver With Ultra-Fast Data Processing

July 23, 2019 | 16:05
The “end-to-end transmitter-receiver” chip boasts a unique architecture combining digital and analog components on a single platform (Photo: Steve Zylius / UCI).
The “end-to-end transmitter-receiver” chip boasts a unique architecture combining digital and analog components on a single platform (Photo: Steve Zylius / UCI).
A new wireless transceiver invented by electrical engineers at the University of California, Irvine boosts radio frequencies into 100-gigahertz territory, quadrupling the speed of the upcoming 5G wireless communications standard.

Labeled an “end-to-end transmitter-receiver” by its creators in UCI’s Nanoscale Communication Integrated Circuits Labs, the 4.4-millimeter-square silicon chip is capable of processing digital signals significantly faster and more energy-efficiently because of its unique digital-analog architecture. The team’s innovation is outlined in a paper published recently in the IEEE Journal of Solid-State Circuits.

“We call our chip ‘beyond 5G’ because the combined speed and data rate that we can achieve is two orders of magnitude higher than the capability of the new wireless standard,” said senior author Payam Heydari, NCIC Labs director and UCI Professor of Electrical Engineering & Computer Science. “In addition, operating in a higher frequency means that you and I and everyone else can be given a bigger chunk of the bandwidth offered by carriers.”

He said that academic researchers and communications circuit engineers have long wanted to know if wireless systems are capable of the high performance and speeds of fiber-optic networks. His group’s answer is in the form of a new transceiver that leapfrogs over the 5G wireless standard – designated to operate within the range of 28 to 38 gigahertz – into the 6G standard, which is expected to work at 100 gigahertz and above.

While this digital dream has driven technology developers for decades, stumbling blocks have begun to appear on the road to progress. According to Heydari, changing frequencies of signals through modulation and demodulation in transceivers has traditionally been done via digital processing, but integrated circuit engineers have in recent years begun to see the physical limitations of this method.

“Moore’s law says we should be able to increase the speed of transistors – such as those you would find in transmitters and receivers – by decreasing their size, but that’s not the case anymore,” he said. “You cannot break electrons in two, so we have approached the levels that are governed by the physics of semiconductor devices.”

To get around this problem, NCIC Labs researchers utilized a chip architecture that significantly relaxes digital processing requirements by modulating the digital bits in the analog and radio-frequency domains.

Heydari said that in addition to enabling the transmission of signals in the range of 100 gigahertz, the transceiver’s unique layout allows it to consume considerably less energy than current systems at a reduced overall cost, paving the way for widespread adoption in the consumer electronics market.

Co-author Huan Wang, a UCI doctoral student in Electrical Engineering & Computer Science and an NCIC Labs member, said that the technology combined with phased array systems – which use multiple antennas to steer beams – facilitates a number of disruptive applications in wireless data transfer and communication.

Source: University of California, Irvine
 
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