Test Equipment with HSDPA Capabilities
Mon, 02/02/2004 - 8:04am
Agilent introduces high-speed downlink packet access (HSDPA) capabilities for its high-performance E4438C vector signal generator, PSA Series spectrum analyzers, and E4406A vector signal analyzer. These powerful tools give design engineers the ability to design, debug and evaluate the performance of their 3G and 3.5G transmitters and receivers using HSDPA signals. HSDPA is a packet-based data service within W-CDMA that allows data transmission at up to 14 Mb/s in the W-CDMA downlink through the use of adaptive modulation coding. Non-packet-based W-CDMA uses QPSK modulation, while HSDPA can use higher data rates with 16QAM when the link quality permits. Agilent Signal Studio for HSDPA over W-CDMA software simplifies the creation of HSDPA I/Q waveforms for use with the Agilent E4438C ESG vector signal generator. The software (Option 418) provides convenient access to transport and physical layer parameters to enable the generation of W-CDMA-based HSDPA test signals specifically designed for performing receiver block error rate (BLER) measurements on the HSDPA channel. In addition to BLER testing, Signal Studio for HSDPA over W-CDMA allows design and production engineers to test the ability of: user equipment to identify and demodulate 16QAM and QPSK signals and to monitor the correct HS-SCCH, and base stations to correctly demodulate CQI and ACK/NACK patterns up to 1280 subframes in length. Agilent's HSDPA measurement personality (Option 210) for the PSA Series high-performance spectrum analyzer and the Agilent E4406A vector signal analyzer provides new composite EVM and code domain tests that support 16QAM for full characterization of devices and systems that will be used in this new access method. This tool gives design and production engineers the ability to descramble and despread the HSDPA signal in the code domain to measure the symbol power, the demodulated data bits, or the EVM of a particular code channel.
Agilent Technologies, Inc.