초록 ▼

A transmission system includes a transmitter and a receiver and transmits a data signal with an analog passband signal through an analog transmission line. The data signal is transformed to a signal representing a descrete data signal point in a vector signal space. The transmitter includes a data s

A transmission system includes a transmitter and a receiver and transmits a data signal with an analog passband signal through an analog transmission line. The data signal is transformed to a signal representing a descrete data signal point in a vector signal space. The transmitter includes a data signal point generation unit and a vector signal superimposing unit. The analog passband signal is transformed to a base band signal, and the base band signal is superimposed on the signal representing a descrete data signal point. A signal representing the superimposed data signal point is modulated and transmitted through the analog transmission line. The receiver includes a demodulator unit and a decision unit, wherein the data signal point is decided from the signal representing the superimposed data signal point, and the superimposed base band signal is extracted in a subtracter unit by subtracting the decided result from the signal representing the superimposed data signal point. The base band signal is transformed to the analog passband signal. A portion of information carried by the analog passband signal may be converted to a digital signal, and the digital signal is multiplexed in a multiplexer unit with the data signal. The base band signal is superimposed on a signal representing a data signal point generated from a signal generated by the multiplexing.

대표청구항 ▼

[ We claim:] [1.] A transmission system comprising a transmitter; a receiver; and an analog transmission line interconnecting said transmitter and said receiver;said transmitter comprising:a data signal point generation means for receiving a serial digital data signal and generating a first vector b

[ We claim:] [1.] A transmission system comprising a transmitter; a receiver; and an analog transmission line interconnecting said transmitter and said receiver;said transmitter comprising:a data signal point generation means for receiving a serial digital data signal and generating a first vector base band signal corresponding to a data point signal in a vector signal space, based on a block series of samples of the received serial digital data signal, wherein the generated data signal point is one of a plurality of predetermined data signal points in the vector signal space;a base band signal transformation means for receiving an analog signal in the form of an analog passband signal and transforming the analog passband signal into a second vector base band signal,a vector signal superimposing means for superimposing a plurality of vector components of the second vector base band signal on a plurality of vector components of the first vector base band signal, component by component, to generate a superimposed vector base band signal; anda modulation means for modulating the superimposed vector base band signal to generate an analog modulated signal to be transmitted through said analog transmission line;said receiver comprising:a demodulator means for receiving the analog modulated signal transmitted through the analog transmission line and demodulating the analog modulated signal to regenerate the superimposed vector base band signal;a decision means for receiving the regenerated superimposed vector base band signal and determining to which one of the plurality of predetermined data signal points in the vector signal space the regenerated superimposed vector base band signal corresponds, to regenerate the first vector base band signal;a vector signal subtracter means for receiving the regenerated superimposed vector base band signal and the regenerated first vector base band signal and subtracting a plurality of vector components of the first vector base band signal from a plurality of vector components of the superimposed vector base band signal, component by component, to regenerate the respective vector components of the second base band signal;a code transformation means for receiving the first vector base band signal, and transforming the first vector base band signal to regenerate the serial digital data signal; anda passband transformation means for receiving the regenerated second base band signal, and transforming the regenerated second base band signal to regenerate the analog signal in the form of the passband signal.