Forward error correction for chirp spread spectrum

A method for error correction decoding in wireless communication, comprising:

• receiving a chirp signal having a plurality of chirps, wherein each chirp corresponds to a sequence of M bits, and wherein the plurality of chirps correspond to N sequences of M bits;
• loading the N sequences of M bits into an M bit by N bit (M×N) matrix in a first direction, wherein the (M×N) matrix comprises P parity on parity bits, wherein each M bit row corresponds to a first codeword, and wherein each N bit column corresponds to a second codeword;
• decoding each N bit column within the M×N matrix based on an error correction code and N-Q parity bits, wherein M-D of the N bit columns are parity columns and the N-Q parity bits are parity on parity bits, wherein decoding each N bit column comprises correcting any correctable bit errors within Q bits in the N bit column based on the error correction code and the N-Q parity bits;
• decoding each M bit row within the M×N matrix based on the error correction code and M-D parity bits, wherein decoding each M bit row comprises correcting any correctable bit errors within D bits of data in the M bit row based on the error correction code and the M-D parity bits;
• and
• unloading K bits of data sequentially from the M×N matrix in a second direction, wherein the K bits of data are unloaded from Q sequences of D bits.