Title:
TECHNOLOGY FOR THE PURPOSE OF DETERMINING SIGNAL DISPERSION CHARACTERISTICS IN COMMUNICATION SYSTEM
Document Type and Number:
Japanese Patent JPH03186019
Kind Code:
A
Abstract:
PURPOSE: To accurately determine small amplitude and long period signal distribution by including the 1st and 2nd numbers of preset symbols in 1st and 2nd training sequences, differently setting up the 1st and 2nd numbers and transmitting the 1st and 2nd training sequences at related time intervals. CONSTITUTION: The 2nd training sequence different from the 1st training sequence is transmitted at the same symbol rate as the 1st training sequence and the format is shown by 201 in the figure. A zero DC level 15 maintained at 36μs of time interval 202, sixty-three symbols are included immediately after the time interval 202 and the 2nd training sequence extended by 12μs is transmitted twice at continuous time intervals 203, 204. The zero DC level is maintained at remaining 4μs shown as a time interval 205. Consequently small amplitude and long period signal distribution can be accurately determined.
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Inventors:
TSUIIHON CHIYAO
BAATON RUUBEN SARUTSUBAAGU
JINNDEA WAN
BAATON RUUBEN SARUTSUBAAGU
JINNDEA WAN
Application Number:
JP33085190A
Publication Date:
August 14, 1991
Filing Date:
November 30, 1990
Export Citation:
Assignee:
AMERICAN TELEPHONE & TELEGRAPH
International Classes:
H04B1/76; H04L25/03; H04N17/00; H04L27/233; H04L27/38; H04N5/21; H04N7/015; (IPC1-7): H04B1/76; H04N17/00
Attorney, Agent or Firm:
Masao Okabe (2 outside)