LTE uplink developments validated

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The TS8980 RF conformance test system from Rohde & Schwarz has been used in the first validation of LTE-Advanced uplink carrier aggregation (UL CA) and LTE-Advanced Pro uplink 64QAM (UL 64QAM). The step is said by the company to be a critical part of device certification, adding that mobile manufacturers will be able to certify their devices in line with Global Certification Forum (GCF) requirements.

The validation took place at the recent GCF meeting in New Jersey, supported by leading wireless network operators and cellular equipment manufacturers.

UL CA and UL 64QAM enable users to access higher uplink data rates and offer all users higher average uplink data rates. UL CA, a new feature in the 3GPP Rel. 12 specification, combines two LTE uplink channels for one user, effectively doubling the uplink data rate to 100Mbit/s per LTE user using 16QAM in the uplink.

UL 64QAM, introduced in 3GPP Rel. 13 as a new modulation scheme for the LTE uplink, boosts uplink data throughput by transmitting 6bit per transmitted uplink symbol instead of the current 4bit. When these features are combined, UL CA and UL 64QAM could enable a maximum uplink data rate of 150Mbit/s.

The TS8980 is a scalable and validated GCF and PTCRB test system providing test coverage for Rel. 8 to Rel. 13 versions of 3GPP 36.521-1, 36.521-3 and supplementary RF/RRM test plans for wireless network operators.