This example shows how to use both channels of the USRP® B210, X300 or X310 to transmit a 2 antenna LTE waveform generated by LTE Toolbox™. The generated waveform includes the SIB1 message and all physical channels and signals required to decode it.
LTE Toolbox can be used to generate standard-compliant baseband IQ downlink and uplink reference measurement channel (RMC) waveforms and downlink test model (E-TM) waveforms. These baseband waveforms can be modulated for RF transmission using SDR radio hardware such as the USRP®-based radio.
In this example eight frames of a baseband RMC waveform are generated using the LTE Toolbox. The SIB1 message is included in this waveform. A continuous RF LTE waveform is created by looping transmission of these eight frames with the USRP® radio hardware for a user-specified time period.
If you have a second SDR platform, the transmitted waveform can be captured and the MIB and SIB1 messages decoded using the companion example Two Antenna LTE Cell Search, MIB and SIB1 Recovery using USRP® based Software Defined Radio (SDR).
This example requires the USRP®-based radio support package. This can be installed using the Add-On Explorer.
More information about other supported SDR platforms can be found here.
The full example description and source code can be found in the list of examples using USRP® under the name "LTE SIB1 Transmission over Two Antennas".
Universal Software Radio Peripheral® and USRP® are trademarks of National Instruments Corp.