Communications tester adds 256QAM for LTE and LTE-A

February 22, 2016 // By Graham Prophet
Modulation methods such as 256QAM and 64QAM in LTE and LTE-Advanced (LTE-A) increase data rates in both the downlink and uplink. Rohde & Schwarz now offers these innovative steps on its R&S CMW500 wideband radio communication tester.

Rohde & Schwarz is now demonstrating (at Mobile World Congress 2016) RF tests for LTE-Advanced carrier aggregation with four component carriers in the downlink. The solution consists of the CMWflexx setup, containing two CMW500 and one CMWC controller. Each CMW500 generates two component carriers with 2x2 MIMO using the 256QAM modulation method. The entire R&S CMWflexx setup can achieve a high data throughput of up to 800 Mbps in the downlink.

Using the CMWC controller, the CMWflexx is as easy to operate as a CMW500. Users have a lot of flexibility, since both CMW500 testers can also be used separately. A number of other test functions are also available, such as uplink carrier aggregation, FDD/TDD joint operation and LTE 4CC up to 8x2 MIMO.

Rohde & Schwarz has also shown RF tests on the CMW500 with 64QAM modulation in the uplink. These modulation methods increase the data rate in the uplink for LTE. The test setup reaches a data throughput of 75 Mbps on a single carrier or 150 Mbps in combination with LTE-Advanced uplink carrier aggregation.

Rohde & Schwarz;