Josh Morman

3.10 is the latest release of GNU Radio and includes some powerful features and new modules. We will step through the new features and what they enable before going further in depth with some examples of the upstreamed Hardware Accelerator Support that was presented last year at FOSDEM. This feature provides streamlined data movement via support of "custom buffers" which allow a device-compatible mapping of the memory presented to a block's work function, eliminating additional ingress/egress in and out of device memory. We will show how this impacts specifically flowgraphs that have CUDA enabled blocks as a concrete example.

The vision for a new GNU Radio runtime is to have a straightforward implementation of distributed SDR systems that make efficient use of the platform and its accelerators. Though there have been many projects over the years to address some of these goals, many aspects are challenging to do in the current GNU Radio runtime.

One year ago, several of us got together at the pre-FOSDEM hackfest and started planning how to "write a GNU Radio runtime that works for humans". Since that time the project has taken several different directions, all aiming to make the core aspects of GNU Radio modular and easier to use by laying a fresh foundation. In this talk, we will overview the current state of the "newsched" project, and where we plan to take it.

We examine the use of equalizers in wireless communication systems, how these are implemented in GNU Radio, and how the existing GR equalizer functionality can be extended with a new OOT using training-based adaptation. The theory of multipath channels, ISI, and how to overcome with adaptive equalization will be reviewed and shown with interactive flowgraphs.

Please note that this talk was originally scheduled to be given at 2:30 PM and will now take place at 10:00 AM.