| 摘要 |
An encoder of a transmitter converts digital data or analog signal information into an encoded sequence or waveform required by a communication channel. If a plurality of transmitters are to share a common channel or medium, then the correlation properties of the encoded signal are important. The encoding apparatus should employ a code which is not very susceptible to noise, yet will permit the detection of multiple transmissions of similar spectrum signals. The apparatus disclosed in this specification is concerned with a binary digital information encoder whose input is either a "zero" or "one" state. The encoder generates a ternary code sequence for encoding one binary input state with the sequence + 1,+1,0,0,-1,-1 and the other binary input state with the sequence represented by +1,0,+1,-1,0,-1.
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