Key facts
The LTE software options generate standard-conformant FDD or TDD signals in line with 3GPP Release 8 to 15 directly on the instrument or on the desktop using R&S®WinIQSIM2;TM. The options support all uplink, downlink and sidelink channel bandwidths and of LTE and NB-IoT physical channels, including channel coding and scrambling. An intuitive GUI, context-sensitive help menu, presets for downlink test models, uplink FRCs and a graphical time plan of the configured signals all contribute to a fast and efficient workflow. Intermediate signal generation chain results can be easily logged to help with debugging. Furthermore, a test case wizard ensures easy setup of base station conformance tests in line with 3GPP TS 36.141.
Flexibly configure LTE, NB-IoT and sidelink physical layer
The LTE options implement the physical layer in line with 3GPP Release 8 to 15. The options support all downlink, uplink and sidelink physical channels and all specified channel bandwidths and modulation schemes such as 1024QAM, along with important physical layer features such as channel coding, scrambling, multiplexing of data and control information. This provides standard-conformant signals for testing components, modules, receivers and base stations.
Main menu, base station settings (downlink).
Easily configure up to 8-layer MIMO and aggregate up to 5 carriers
The LTE options provide full MIMO and transmit diversity support with flexible LTE antenna port mapping in line with 3GPP Release 8 to 15. Intra-carrier and inter-carrier aggregation of up to five component carriers can be configured, including mixed TDD/FDD CA in uplink and cross-carrier scheduling. Up to four scheduled users in downlink and up to eight users in uplink can be configured for realistic receiver tests.
Uplink carrier aggregation dialog
The test case wizard supports test signal configuration in line with 3GPP TS 36.141, required for base station conformance and performance tests. A selection of predefined settings for wanted and interfering signals based on defined test cases are available. Presets and predefined settings for downlink test models and uplink fixed reference channels enable easy set up of test signals for components and base stations.
Test case wizard main dialog
Graphical signal monitoring of virtually any point
Along with a convenient display of configured resource allocations over time, various graphical displays support fast and easy signal configuration or evaluations to reveal resource allocation conflicts. Graphical signal monitoring is also provided in real time. It can display power spectrum, I and Q vs. time, vector diagram, CCDF and more.
Power spectrum of a configured LTE signal.
Real-time HARQ feedback support
The LTE closed-loop BS test option enables test engineers to generate dynamically changing LTE test signals as required. This allows HARQ feedback and uplink timing adjustment tests in line with LTE base station test specification 3GPP TS 36.141 (Chapter 8). Simulated UEs can respond in real time to HARQ feedback (ACK/NACK) and timing adjustment commands from the base station.
Real-time HARQ feedback dialog.
Log files for design verification and enhanced debugging
Logging points are provided to capture the intermediate results from the signal processing chain, including forward error correction, which can be stored in either bit stream or I/Q sample files. This lets designers verify their LTE physical layer receiver and transmitter software implementations and gain insights for enhanced debugging.
Log points for downlink log file generation.
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