The utility module contains useful functions, primarily for bit fast bit manipulation. This includes packing/unpacking byte arrays, counting ones in an integer, computing a binary dot-product, and others. Byte packing is used extensively in the fec ( section-fec ) and framing ( section-framing ) modules.

http://liquidsdr.org/doc/utility/

The liquid packetizer is a structure for abstracting multi-level forward error-correction from the user. The packetizer accepts a buffer of uncoded data bytes and adds a cyclic redundancy check (CRC) before applying two levels of forward error-correction and bit-level interleaving.

http://liquidsdr.org/doc/packetizer/

This tutorial will demonstrate computation at the byte level (raw message data) by introducing the forward error-correction (FEC) coding module. Please note that liquid only provides some very basic FEC capabilities including some Hamming block codes and repeat codes.

http://liquidsdr.org/doc/tutorial-fec/

The fec module implements a set of forward error-correction codes for ensuring and validating data integrity through a noisy channel. Redundant "parity" bits are added to a data sequence to help correct errors introduced by the channel.

http://liquidsdr.org/doc/fec/

The bpacketgen and bpacketsync objects realize a pair of binary packet generator and synchronizer objects useful for streaming data applications. The bpacketgen object generates packets by encapsulating data using a packetizer object but adds a special bit sequence and header to the beginning of the packet.

http://liquidsdr.org/doc/bpacket/

This section describes the functionality of the liquid interleaver object. In wireless communications systems, bit errors are often grouped together as a result of multi-path fading, demodulator symbol errors, and synchronizer instability.

http://liquidsdr.org/doc/interleaver/