An RF identification system has a forward link that includes an encoder and decoder that utilize an (8, 13, 4) block code. The (8, 13, 4) block code has the ability to detect one bad bit in a thirteen-bit block, and can always detect two bad bits per block....http://www.google.com/patents/US5608739?utm_source=gb-gplus-sharePatent US5608739 - Apparatus and method for error detection and correction in radio frequency identification device
