Apparatus for constant amplitude coded bi-orthogonal...

Multiplex communications – Generalized orthogonal or special mathematical techniques – Particular set of orthogonal functions

Reexamination Certificate

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C370S342000, C714S052000, C714S797000, C714S801000

Reexamination Certificate

active

10649647

ABSTRACT:
A constant amplitude coded bi-orthogonal demodulator demodulates the received constant amplitude bi-orthogonal modulated data, cancels the parity bits to generate the serial data, detects the occurrence of an error by dividing the demodulated data into a plurality of groups of data, outputs the serial data as demodulated data if an error does not occur, sequentially converts bit polarities of data of groups in which an error occurs if the error detector detects the error, compares distances between the received bi-orthogonal modulated data and the constant amplitude coded bi-orthogonal modulated data, and selects, as demodulated data, data of which corresponding bit polarities are changed according to the comparison results.According to the present invention, power consumption is reduced, a power amplifier can be manufactured at an inexpensive cost, interference robustness can be ensured, and data can be transmitted at a high transmission rate and a variable transmission rate.

REFERENCES:
patent: 5675572 (1997-10-01), Hidejima et al.
patent: 6091784 (2000-07-01), Park et al.
patent: 6298099 (2001-10-01), Resnikoff et al.
patent: 6434111 (2002-08-01), Voyer et al.
patent: 6668352 (2003-12-01), Jung

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