초록

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.

대표청구항 ▼

A radio frequency identification system comprising: a source of an information signal having eight-bit blocks; (8, 13, 4) block code encoder means responsive to the information signal for providing a linear systematic block coded signal comprising a coded block having eight information bits and five

A radio frequency identification system comprising: a source of an information signal having eight-bit blocks; (8, 13, 4) block code encoder means responsive to the information signal for providing a linear systematic block coded signal comprising a coded block having eight information bits and five code bits for each of the eight-bit blocks; transmitter means responsive to the thirteen-bit linear systematic block coded signal for providing a transmitted signal; receiver means responsive to the transmitted signal for providing a signal comprising received coded blocks; (8, 13, 4) linear systematic block code decoder means for decoding the received coded blocks to provide a decoded signal comprising one eight-bit decoded block for each of the received coded blocks, the eight-bit decoded blocks being generated each time there are less than two bit errors in a received coded block; means within the decoder for determining if there are exactly two bit errors in any of the received coded blocks; means within the decoder for correcting one bit error operable each time only one bit error occurs in any of the received coded blocks; and identifier means responsive to the eight-bit decoded blocks for providing a return identification signal.