Special eye pattern and modulation and demodulation method using

Details Special eye pattern and modulation and demodulation method using Special eye pattern and modulation and demodulation method using

1995-09-18

1999-10-26

Pham, Chi H.

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

375340, 329304, 332103, H04L 512, H04L 2302

Patent

active

059740906

ABSTRACT:
The invention relates to an eye pattern which is generated upon transmission and also to a modulation and demodulation method which employs the eye pattern. The eye pattern and the modulation and demodulation method are improved in that, by devising the arrangement of signal points, the timing jitter amount is minimized and a frequency offset can be followed up accurately. The eye pattern to be generated upon transmission is constructed such that the arrangement of signal points thereof is not symmetrical with respect to the origin on a signal point arrangement plane on which the signal points are arranged.

REFERENCES:
patent: 4538284 (1985-08-01), Lang et al.
patent: 4601044 (1986-07-01), Kromer
patent: 4959842 (1990-09-01), Forney
patent: 5369500 (1994-11-01), Jacobs
patent: 5377194 (1994-12-01), Calderbank
patent: 5442655 (1995-08-01), Dedic et al.
patent: 5537437 (1996-07-01), Kaku et al.
Chung, Unequal Error Protection of Data Using Trellis-Coded Modulation, GLOBECOM'92: IEEE Global Telecommunications Conference p. 1759-55, 1992.

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