Data transmitting-receiving system
AssigneeFujitsu Limited
InventorNoriyasu Toyonaga
Life of this patent
Estimating the term…
Abstract
A data transmitting-receiving system, in the transmitter of which, digital modulations are applied to a vertically (V) polarized wave carrier and a horizontally (H) polarized wave carrier. The V- and H-polarized waves have the same frequency and are in synchronism with each other and the digital modulations are achieved in accordance with data to be transmitted supplied via two separate routes. Thus, a plurality of coded points corresponding to data are distributed in a three dimensional space and transmitted to a receiver. The receiver receives the coded points distributed in a three dimensional space and then reproduces the transmitted data therein.
Claims11
A data transmitting-receiving system comprising a transmitter unit, for transmitting two channels of data derived from a first route and two channels of data derived from a second route, and a receiver unit, for receiving, via a radio transmission line, said data, said transmitter unit comprising a transmitting apparatus generating a carrier from which is produced both a vertically (V) polarized wave and a horizontally (H) polarized wave each having the same frequency and in synchronism with each other and said V- and H-polarized waves being produced respectively according to said data from the first and second routes, the transmitting apparatus outputting a vector addition wave defined by both the modulated V- and H-polarized waves, and said receiver unit comprising a receiving apparatus receiving and dividing said vector addition wave into received V- and H-polarized waves, demodulating the V- and H-polarized waves, suppressing interference between the demodulated V- and H-polarized waves, between channels within each demodulated polarized wave and within data into a channel, and reproducing the original data of said first and second routes.
A vector addition wave transmitter receiving a clock signal, comprising:
- an intermediate frequency oscillator;
- a local oscillator;
- vertical side modulation means, operatively connected to receive the clock signal, to said intermediate frequency oscillator and said local oscillator, for producing a vertical side modulated wave from first and second data signals;
- horizontal side modulation means, operatively connected to receive the clock signal, to said intermediate frequency oscillator and to said local oscillator, for producing a horizontal side modulated wave from third and fourth data signals;
- and
- combining and transmitting means, operatively connected to said vertical side modulation means and said horizontal side modulation means, for producing a vertical polarized wave from said vertical side modulated wave and a horizonal polarized wave from said horizontal side modulated wave and for combining the vertical and horizontal polarized waves and transmitting the combination as a vector addition wave.
A vector addition wave receiver, comprising:
- means for receiving a vector addition wave and dividing it into a modulated vertical polarized wave and a modulated horizontal polarized wave;
- carrier recovery means, operatively connected to said means for receiving, for reproducing a modulated IF carrier from the modulated vertically and horizontally polarized waves;
- bit timing recovery means, operatively connected to said carrier recovery means, for producing a bit clock signal from the modulated IF carrier;
- vertical polarized wave demodulator means, operatively connected to said means for receiving, said carrier recovery means and said bit timing recovery means, for demodulating the modulated vertically polarized wave with the modulated IF carrier;
- horizontal polarized wave demodulator means, operatively connected to said means for receiving, said carrier recovery means and said bit timing recovery means, for demodulating the modulated horizontally polarized wave with the modulated IF carrier;
- inter-symbol compensating means, operatively connected to said vertical polarized wave demodulator means and said horizontal polarized wave demodulator means, for suppressing intersymbol interference between the demodulated vertically polarized wave and the demodulated horizontally polarized wave, for suppressing interference between adjacent bits, and for suppressing interference between in-phase and quadrature phase channels in each side;
- vertical decoder means, operatively connected to said inter-symbol compensating means and said bit timing recovery means, for producing first and second data signals from the compensated demodulated vertically polarized wave using the bit clock signal;
- and
- horizontal decoder means, operatively connected to said inter-symbol compensating means and said bit timing recovery means, for producing third and fourth data signals from the compensated demodulated horizontally polarized wave using the bit clock signal.
Dependencies are inferred from the claim text.