H - Electricity – 04 – L
Patent
H - Electricity
04
L
329/2
H04L 27/06 (2006.01) H04L 27/38 (2006.01)
Patent
CA 1329829
DIGITAL DEMODULATOR APPARATUS ABSTRACT OF THE DISCLOSURE A digital demodulation apparatus which has a detector (11) which receives transmission signals (Sin) modulated under a multivalue quadrature amplitude modulation method having a honeycomb structure signal point arrangement and which produces I channel and Q channel demodulation signals and a discriminator (13) which converts the analog demodulation signals (Sa) to digital demodulation signals (Sd), a memory (21) being introduced which successively receives said digital demodulation signals (Sd) and reproduces corresponding original data, said read only memory (21) storing data premapped in the same way as the honeycomb structure signal point arrangement and storing polarity bits (P) and error bits (E) of the signal points.
561752
Aono Yoshihito
Daidoh Yoshimasa
Fujino Nobutsugu
Iwamatsu Takanori
Minowa Morihiko
Fujitsu Limited
Mcfadden Fincham
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