Boots – shoes – and leggings
Patent
1984-05-07
1986-07-29
Wise, Edward J.
Boots, shoes, and leggings
375 86, 329137, H04L 2710, H04B 110, H03D 322
Patent
active
046033939
ABSTRACT:
The demodulator is for use with an angle modulated signal conveying a sequence of binary symbols. The signal is modulated at constant envelope and with continuous phase and may be treated as a sequence of elementary pulses that have been amplitude modulated using a principal function F.sub.p (t) derived from the frequency pulse characteristic of the modulation. The demodulator comprises two filters matched to the principle function and connected to receive quadrature components constituting the complex envelope of the received signal. The filters are followed by samplers. A calculating circuit operating at the bit rate calculates metric increments on the basis of P stored complex samples and transmits the increments to a decision circuit which performs a dynamic programming algorithm to determine the values of the bits in the sequence recursively.
REFERENCES:
patent: 4079330 (1978-03-01), Ishigaki et al.
patent: 4087752 (1978-05-01), Melvin
patent: 4191926 (1980-03-01), Pontano et al.
patent: 4246654 (1981-01-01), Malm
patent: 4510453 (1985-04-01), Sun
International Conference on Communications, vol. 3, 10-14, Jun. 1979, Boston, New York (US); T. Aulin et al.: "Bandwidth Efficient Digital FM with Coherent Phase Tree Demodulation", pp. 42.4.1-42.4.6.
Ganem Herve
Laurent Pierre
"Thomson-CSF"
Wise Edward J.
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