Rohde & Schwarz has successfully verified combining various frequency bands in mixed-mode TDD and FDD mixed carrier aggregation using the R&S CMW500 wideband radio communication tester.
02/16/2015 | Test & Measurement Rohde & Schwarz verifies TDD/FDD LTE bands for mixed carrier aggregation Thanks to TDD/FDD joint operation technology, wireless network operators will soon be able to aggregately use existing frequency bands with different duplex modes. This yields even more flexibility for carrier aggregation in line with LTE-Advanced Release 12. Rohde & Schwarz has successfully verified combining various frequency bands in mixed-mode TDD and FDD mixed carrier aggregation. During the test, the R&S CMW500 wideband radio communication tester from Rohde & Schwarz simulated an LTE network with simultaneous time division duplex (TDD) and frequency division duplex (FDD). The data was successfully transferred to the DUT on multiple aggregated carriers in different duplex modes.
This makes the R&S CMW500 the only test platform to support RF and protocol tests for carrier aggregation in line with 3GPP Rel. 12 for TDD/FDD joint operation. With this test result, Rohde & Schwarz has paved the way for the entire wireless ecosystem, effectively driving the development of future wireless devices for mixed carrier aggregation.
Network operators often have spectra in various frequency bands, which they exploit in TDD or FDD mode depending on conditions. Mixed-mode TDD/FDD will now enable them to use carrier aggregation to combine FDD and TDD cells. This not only gives network operators more flexibility in band and spectrum selection, they can also offer higher data rates to subscribers. Carrier aggregation was previously used to combine multicarrier signals with the same mode (FDD or TDD).
The TDD/FDD joint operation test functionality is now available for the R&S CMW500 RF and protocol testers from Rohde & Schwarz. Rohde & Schwarz will display the setup at Mobile World Congress, booth C40 in hall 6.
Rohde & Schwarz The Rohde & Schwarz electronics group is a leading supplier of solutions in the following business fields: test and measurement, broadcast and media, secure communications, radiomonitoring and radiolocation. Founded more than 80 years ago, this independent company has an extensive sales and service network and is present in more than 70 countries. On June 30, 2014, Rohde & Schwarz had approximately 9800 employees. It achieved a net revenue of EUR 1.75 billion in the 2013/2014 fiscal year (July to June). The company is headquartered in Munich, Germany. It also has regional headquarters in Singapore and Columbia, Maryland, USA, to manage its operations in these regions.
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Rohde & Schwarz has successfully verified combining various frequency bands in mixed-mode TDD and FDD mixed carrier aggregation using the R&S CMW500 wideband radio communication tester. 
