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 On 8 September 2023, Qualcomm Technologies, in collaboration with Samsung Electronics, announced that the companies had successfully executed the world’s first simultaneous 5G 2× uplink and 4× downlink carrier aggregation (CA) for the frequency division duplex (FDD) spectrum.
The test was completed using a mobile phone form factor test device powered by the Snapdragon X75 5G modem and Samsung’s 5G dual-band and triband radios supporting advanced CA technology.
The demand for increased uplink capacity has grown due to more consumers using increasingly higher uplink-heavy applications such as video uploads, video conferencing, social media sharing, and cloud applications. This achievement increases flexibility for operators with fragmented FDD spectrum assets, bringing faster upload speeds to more consumers across a multitude of markets and networks. Previously, uplink CA has been accomplished by combining FDD + time division duplex (TDD) or TDD + TDD configurations.
Full Article: IEEE Vehicular Technology Magazine, Volume 18, Number 4, December 2023 | 
 for the frequency division duplex (FDD) spectrum.*/);){kind=small}
