SDR(Software Defined Radio)

srsLTE

This is an Open Source LTE that has implemented for both eNB and UE. The main scope of this project is to implement Physical Layer libraries (APIs) for LTE eNB and UE, so that anybody can build their full stack LTE UE or eNB based on these library if they can add higher layer radio stack. (I think this is a great idea and can be a huge contribution to the community). As a kind of reference model to build up a full stack radio, the authors has implemented MAC to IP stack for LTE UE and it is also shared under the same project. Refer to srsLTE official page for the source code and the documents.

Contents from Offical Site

• Source Code Download (github) :  srsRAN

• Official Document : srs Document

• Official Site of Product Development : SRS (Software Radio System)

Shartechnote Commenting on srsRAN library

• LTE Cell Detection in srsRAN

• LTE PBCH Eoncoding in srsRAN

• LTE PBCH Decoding in srsRAN

• LTE RACH in srsRAN

• LTE PDCCH Encoding in srsRAN

• LTE PDCCH Decoding in srsRAN
• LTE PDSCH Encoding in srsRAN

API Document

Refer to srsLTE API Document

Build and Installation

Refer to srsLTE Build page

Examples

• Pdsch_Ue : Find Sync, Decode Mib/PDCCH/PDSCH
• Pdsch_enodeb : Generate eNB radio frame / subframe

Presentation/Demo

• [FOSDEM 2014] libLTE (Feb 2014)

• srsLTE project update (Jul 2020)
• UE and RAN in Hardware (conventional cell phone + SDR) and srsLTE: a pratical approach in 4G/EPC (Jul 2020)
• DragonOS Focal 4G LTE basestation detailed setup (srsLTE, bladeRF xA4, USRP b205 mini-i) (Jul 2020)
• DragonOS Focal BladeRF xa4 testing (srsLTE, SigDigger, Gqrx, Cubicsdr, SDRangel, URH) (Jul 2020)
• DragonOS Focal srsLTE Intra eNB Handover w/ GNU Radio (srsLTE, ZMQ) part 1 (Nov 2020)
• srsLTE ZeroMQ (1/2 Install) ※for version 20.10.1 (Apr 2021)
• srsLTE ZeroMQ (2/2 eMBMS) (Apr 2021)

• srsRAN Talk (Nov 2021)

• srsRAN & SCOPE Tutorial on Colosseum (Nov 2021)

Q & A

1. Has your project verified with real hardware ?

Yes. As a radio frontend we use the usrp and bladerf. We have tested the functionality of the ue against the commercial Amarisoft LTE eNodeB.

2. What is the hardware intended/verified for your PHY library

Yes usrp and bladerf. We have tested b210, x300 and the bladerf.

3. Is there any requirement on PC side ? (PC hardware requirement and operating system)

An intel i7 quadcore is preferable but any x86 system should work. Standard Linux OS is required.

4. Is there any other software/library/tools (e.g,GNU Radio, Python etc) that is required besides your source code ?

We don't require python nor gnuradio. Libfftw and Polarssl is the only strict requirement. If volk is detected its simd acceleration functions will be used.