Keysight and Nokia Bell Labs at IMS 2023

Delivering the extreme data speeds, ultra-low latency, and near-infinite bandwidth of 6G will require the use of sub-THz spectrum. However, sub-THz frequencies have not traditionally been used for cellular communications due to their propagation characteristics, which present signal integrity and path loss challenges that can negatively impact performance. To help mitigate these challenges, Keysight and Nokia Bell Labs have been collaborating to develop characterisation techniques to test active sub-THz components, such as amplifiers, mixers, and frequency converters, to ensure they do not introduce additional signal distortion into communications systems.

The collaboration's most recent achievement will be presented at Keysight's booth #835 at IMS 2023. Built on the Keysight PNA-X Vector Component Analyzer (VCA) solution, the demonstration characterises a Nokia power amplifier (PA) developed for use in 6G D-band wireless communications systems and designed to operate with a low error vector magnitude (EVM). Using the Keysight N5290A PNA Millimeter Wave System, Nokia Bell Labs can accurately detect the PA's low EVM, which is a measure of the signal distortion introduced into the communications system by the component. With these measurements, Nokia Bell Labs can better understand the PA's performance to optimise its 6G transmission system design.

Keysight and Nokia Bell Labs are also partnering to showcase an E-band test solution at IMS 2023. The demonstration features the Keysight N9042B UXA Signal Analyzer used in combination with the V3050A Signal Analyzer Frequency Extender to measure a Nokia transceiver RFIC designed for use in an E-band system for backhaul applications.

To help network equipment manufacturers, semiconductor companies, and device makers address the bandwidth and performance demands of 6G, Keysight offers a 6G Sub-THz R&D Testbed. The wideband sub-THZ testbed features an arbitrary waveform generator (AWG) that generates a wideband intermediate frequency (IF), which is upconverted to H-band (220-330 GHz). The signal is downconverted to an IF, digitised with a UXR high-performance oscilloscope, then demodulated and analysed using PathWave Vector Signal Analysis (VSA) software.

Shahriar Shahramian, Head of RFIC & Packaging Lab, Nokia Bell Labs, said: "At Nokia Bell Labs we continue to push the carrier frequency and complexity of our RFIC, packaging, and module integration. With these advancements we move the frontier of what is possible from 6G wireless and optical communication systems. Consequently, the test and measurement industry plays a vital role to enable the complex characterisation demanded from our devices and to reduce our time to market. We have been working closely with Keysight throughout our design and verification journey. Keysight continues to deliver innovation in both their software and hardware 6G measurement platforms, which we rely on for characterising our next generation systems."

Giampaolo Tardioli, Vice President for Keysight's 6G and Next Generation program, said: "With 6G, we are on the cusp of realising an unprecedented new era of high-speed, high-reliability, and flexible mobile connectivity that promises to transform human communications. This shift will be driven by the use of the sub-THz spectrum, which will give us the speeds needed to enable 6G use cases such as augmented reality and autonomous transportation. By working closely with global industry partners like Nokia Bell Labs today, Keysight is helping to create the 6G technologies needed for tomorrow's mobile networks."

The Keysight and Nokia Bell Labs 6G D-band PA characterisation demonstration will also be presented at Radio Frequency Integrated Circuits Symposium 2023, which is co-located with IMS 2023.