Europe Germany : Network operators worldwide are currently upgrading their UMTS networks with high speed downlink packet access (HSDPA). From 2007, high speed uplink packet access (HSUPA) will improve the performance of data transmission from mobile phones to base stations. But that is by no means the end of UMTS enhancement: 3GPP is already developing a specification for UMTS long-term evolution (LTE). And Rohde & Schwarz is among the front runners heading toward the next mobile radio generation.

UMTS LTE will ensure the long-term competitiveness of UMTS for broadband mobile radio applications or mobile TV. The goal is to achieve data rates of up to 100 Mbit/s in the downlink, and up to 50 Mbit/s in the uplink. Significant improvements in terms of access times, data throughput and spectral efficiency will also follow. As with WiMAX, data transfer from the base station to the mobile phone is based on orthogonal frequency division multiple access (OFDMA). In the uplink, the single carrier frequency division multiple access (SC-FDMA) transmission method is used. UMTS LTE is scheduled to be launched in 2009.

As is already the case with HSPA (the common operation of HSDPA and HSUPA, Rohde & Schwarz will also support the further development of this new standard with T&M solutions. The company now provides first solutions for analyzing and generating UMTS LTE signals by using the R&S FSQ high-end spectrum analyzer and the R&S SMU200A signal generators. For HSPA test and measurement applications, Rohde & Schwarz already offers a complete selection of products. Chipsets, user equipment, base stations and networks can thus be thoroughly tested before new functions are put into operation.

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