| 摘要 |
an information recorder for temporarily recording information to be transmitted and for outputting the information to be satisfied with a transmission mode; a transmitting control signal generator for selecting the transmission mode to generate a transmitting control signal corresponding to the transmission mode selected; a first coder for inputting the information to be transmitted from the information recorder, being synchronous with the transmitting control signal and for performing error-correction and coding; a pseudo-noise generator for generating a pseudo-noise, being synchronous with the transmitting control signal; a control code generator for generating preamble and synchronous data, and a control code indicating whether the information to be transmitted is effective; a data patterning unit for adding the control code to the data bit and redundancy bit generated from the first coder and for patterning the added data bit; a synthesizer for synthesizing the patterned data with the pseudo-noise to diffuse data bandwidth to a predetermined extent; and a second coder for coding the synthesized signal to make a level change at a center point of bit time and for transmitting the coded signal.
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