| 11th December - 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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