Transmission method and apparatus wherein binary data bits are converted into barker words and vice versa

摘要

A binary encoded data transmission system wherein a binary data bit of a first value is represented by a first predetermined multi-bit binary Barker word and a binary data bit of a second value is represented by a second multi-bit binary Barker word, the bits in like positions in said first and second words having complementary binary values. A transmitter transmits preselected encoded data words in the aforementioned format and a receiver receives such words for decoding data. A selective call system is provided utilizing Barker/Barker complement encoded words as assigned addresses.