Some channel oriented processing blocks. These functions are also in gnuradio-core. Part of the main gnuradio build.

All the functions for doing digital modulation and demodulation, including bpsk, qpsk, gmsk and ofdm signals. Part of the main gnuradio build.

Handle forward error correction processing in gnuradio. Implements the GNU Radio FEC API, supporting encoders and decoders for no-op dummmy, repetition, and convolutional classes. Part of the main gnuradio build.

Library of filter blocks used in gnuradio. Implements FIR, IIR and FFT filters, as well as Polyphase filterbank and PFB arbitrary resampler methods. Part of the main gnuradio build.

AppStream is a metadata specification which permits software components to provide information about themselves to automated systems and end-users before the software is actually installed. This permits informative displays of new applications to users in software centers, as well as allowing a system to make decisions on which new software a user might want to install (e.g. missing firmware or media handlers).