[Discuss-gnuradio] GSoC2014 Turbo Equalizer

[Jan Krämer]

Hi everyone,

I am a student at Communications Engineering Lab (CEL) at Karlsruhe Institute of Technology. I major in "communication systems" and I am currently doing my masterthesis on "Parallel log-map decoders for manycore architectures". I am interested in participating in GSoC 2014.

There is an older GNURadio GSoC proposal from 2013 to implement a turbo equalizer module in GNURadio in which i am particularly interested working on, as it is closely connected to my current field of study.
So i would like to share my thoughts on a possible Update of the old turbo equalizer proposal (and maybe upgrading it to a current proposal ?).

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Turbo Equalizer

A Turbo Equalizer is a receiver component that is highly effective when receiving messages corrupted by Intersymbol Interference (ISI). To archive this, the turbo equalizer uses an Equalizer to eliminate the ISI and a Log-Map Decoder for Forward Error Correction. Both components pass soft information to each other to increase the performance.

Objectives

Possible (sub-)projects:
1. Implement the Log-Map decoder
    - preferably it can be fully configurable (constraint length, number of states, trellis structure)
    - preferably optimized for real time applications
2. Implement the linear equalizer
    - preferably optimized for real time applications                 

Skills
Knowledge of digital signal processing, C/C++, Python

Potential mentor(s)
Sebastian Koslowski, Michael Schwall

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That would be a project I think would be really interesting to work on and i think it fits well with some of the other proposals for new GNU Radio Modules. As the turbo eq itself is a highly complex architecture, it could also be beneficial to split the tasks in this project. It would be great to get some feedback from you, if this was a proposal that would benefit GNURadio and if it has the potential to be included in the GSoC list of ideas.     

Thanks and regards,
Jan Krämer