The open source effort to establish a 5G testbed is part of a project that was founded by the Department of Telecommunications of the government of India. It has been running for about four years now. There were nine principal investigators on this project.
The project itself officially ended on 1st January 2022. Now, at the Indian Institute of Science in Bengaluru we are on to the maintenance of the project where we maintain the testbed and encourage its usage and do minor developments.
The following is the overview of different aspects of what this project is all about. There are fundamentally four parts to it. Let us dive in and understand about these attributes.
1. System development in sub 6GHz (FR1)
The 6-gigahertz (GHz) development platform is the portion that is actually open source. We have primarily looked at physical layer enhancements and implemented the split six architecture, also called algorithms, and integration with different radio units. We have developed antenna arrays 16 by 4 that are 6499 arrays with an up-down converter and transceiver for the sake of completeness, while testing it alongside extensively in an antiquated chamber.
2. Vehicle-to-X (V2X) platform
It is a Long Term Evolution (LTE) based platform. It is a fully functional platform, which can perform end-to-end latency measurements. We have enhanced the MAC schedulers in LTE and reduced the latency of a native implementation of LTE by a factor between 5 and 10. Also, the remote driving capabilities have been demonstrated on campus.
3. Visible light communications (VLC) system development
This is a complementary technology to 5G and not a mainstream one. We have built a communication system which is able to deliver about 4.8 gigabytes per second using OFDM. It also incorporates beam steering and has technical knowledge to create its backbone.
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Esta historia es de la edición December 2022 de Electronics For You.
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