Digital communications system using complementary codes and ampl

Details Digital communications system using complementary codes and ampl Digital communications system using complementary codes and ampl

1996-09-04

1998-11-24

Chin, Stephen

Pulse or digital communications

Systems using alternating or pulsating current

Angle modulation

375279, 375242, 375268, 342201, 342353, H04L 2710

Patent

active

058418130

ABSTRACT:
The encoding/transmission of information in an OFDM system is enhanced by using complementary codes and different patterns of amplitude modulation representing respective data words. The complementary codes, more particularly, are converted into phase vectors and modulated by the selected pattern. The result is then used to modulate respective carrier signals. The modulated result is then transmitted to a receiver which decodes the received signals to recover the encoded information.

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patent: 5151702 (1992-09-01), Urkowitz
patent: 5602833 (1997-02-01), Zehavi
M.J.E. Golay, "Complementary Series", IRE Transactions on Information Theory, Apr. 1961, pp. 82-87.
T.A. Wilkinson et al., "Minimisation of the Peak to Mean Evnelope Power ratio of Multicarrier Transmission Schemes by Blocking Coding", IEEE Vehicular Technology Conf, Chicago, Jul. 1995, pp. 825-829.
R. L. Frank, "Polyphase Complementary Codes", IEEE Transactions on Information Theory, Nov. 1980, vol. IT-26, No. 6, pp. 641-647.
R. Sivaswamy, "Multiphase Complementary Codes", IEEE Transactions on Information Theory, Sep. 1978, vol. IT-24, No. 5, pp. 546-552.

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