Finite impulse response polyphase filterbank channelizer (firpfbch) uses FFTW library (www.fftw.org) if available, internal FFT library otherwise basis behind OFDM/OQAM.

http://liquidsdr.org/doc/firpfbch/

Finite impulse response polyphase filterbank channelizer with an output rate (firpfbch2).

http://liquidsdr.org/doc/firpfbch2/

The symsync object is a multi-rate symbol timing synchronizer useful for locking a received digital signal to the receiver's clock. It is effectively the same as the resamp object, but includes an internal control mechanism for tracking to timing phase and frequency offsets.

http://liquidsdr.org/doc/symsync/

A cyclic redundancy check (CRC) is, in essence, a strong algebraic error detection code that computes a key on a block of data using base-2 polynomials. While it is a strong error-detection method, a CRC is not an error-correction code.

http://liquidsdr.org/doc/crc/