Vector division multiple access communication system

Details Vector division multiple access communication system Vector division multiple access communication system

1996-06-20

2000-07-25

Vu, Huy D.

Multiplex communications

Generalized orthogonal or special mathematical techniques

370431, H04J 1100

Patent

active

060944153

ABSTRACT:
Communication apparatus comprising a vector division multiple access communications system that uniquely extracts a selected communications link from a communications channel containing many simultaneous links. Each link is assigned a unique vector modulation coefficient using the transmit coefficient generator as its link connection address. The vector modulation coefficient establishes the phase and amplitude states of transmit and receive vector modulators employed in the transmitter and receiver, respectively. The receive vector modulator performs antipodal modulation of the link coefficient and remodulates the received modulated transmit waveform by removing the modulation that was applied by the transmit modulator. When a perfect match occurs, the receive modulator completely removes the modulation applied by the transmit modulator. Thus, a data demodulator following the receive vector modulator has no signal to demodulate and its output is therefore zero. Other than perfect matches between transmit and receive vector modulators result in output signals from the receiver data demodulator that are representative of a lack of match. When a data signal is added to the modulated transmit waveform generated by the transmit vector modulator and transmitter, the receive vector modulator no longer has a 100 percent correlation with the transmit vector modulator. The receiver vector modulator does not remove all of the signal modulation. The receive data demodulator then generates data output signals that represent the data signals transmitted by the transmitter.

REFERENCES:
patent: 3497625 (1970-02-01), Hleman et al.
patent: 5099495 (1992-03-01), Mikoshiba et al.
patent: 5237292 (1993-08-01), Chethik
patent: 5280537 (1994-01-01), Sugiyama et al.
patent: 5426438 (1995-06-01), Peavey et al.
patent: 5436930 (1995-07-01), Bremer et al.
patent: 5463355 (1995-10-01), Halloran
patent: 5666352 (1997-09-01), Ohgoshi et al.
patent: 5684834 (1997-11-01), Betts et al.
patent: 5793759 (1998-08-01), Rakib et al.

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