Method for 5G NR low-density parity-check decoding

A method for 5G new radio (NR) low-density low density parity check (LDPC) decoding by a processor comprising:

• performing a Fast Fourier Transform using a Fast Fourier Transform algorithm;
• determining if a reference sequence is present;
• demodulating at least one orthogonal frequency division multiplexing (OFDM) symbol according to rbin*conj(Hbin)/(norm(Hbin)2+Noise_Power) if the reference sequence is not present;
• decoding the demodulated at least one orthogonal frequency division multiplexing symbol;
• and
• determining if the decoded at least one orthogonal frequency division multiplexing symbol is correct.

A system for 5G new radio (NR) low-density low density parity check (LDPC) decoding comprising:

• an antenna that provides an antenna signal;
• a Fast Fourier Transform calculator that receives the antenna signal and performs a Fast Fourier Transform algorithm to produce a FFT output;
• a reference sequence detector that checks whether a reference sequence is present in the FFT output;
• a channel estimator that generates a channel estimate for the FFT output when the reference sequence is detected to be present in the FFT output and a channel interpolator that processes the channel estimate and produces a channel interpolator output;
• a demodulation calculator and a log-likelihood ratio calculator that performs a calculation on the channel interpolator output according to rbin*conj(Hbin)/(norm(Hbin)2+Noise_Power) and produces a log-likelihood ratio output;
• a low density parity check decoder that decodes the log-likelihood ratio output;
• and
• a cyclic redundancy check that determines whether the decoded log-likelihood ratio is correct.