Wired spread spectrum communication device, a method for communication thereof, and a wired spread spectrum communication system

• US 7,684,466 B2
• Filed: 02/28/2003
• Issued: 03/23/2010
• Est. Priority Date: 03/08/2002
• Status: Active Grant

• Current Assignee: Ibiden Industries Co., Ltd. (Ibiden Co., Ltd.)
• Original Assignee: Ibiden Industries Co., Ltd. (Ibiden Co., Ltd.)
• Inventors: Sasaki, Shigenobu, Kawashima, Mitsusato
• Primary Examiner(s): Ghayour; Mohammad H
• Assistant Examiner(s): Vlahos; Sophia
• Application Number:
  US10/376,801
• Publication Number:
  US 20030169805A1
• Time in Patent Office: 2,580 Days
• Field of Search: 375/200, 375/201, 375205-206, 375/130, 375/133, 375/141, 375/142, 375145-147, 375/148, 375/295, 375135-136, 375145- 17, 375149-150, 375/219, 375/256, 375306-307, 375/316, 375/340, 375/349, 375/351, 370/13, 370 17- 18, 370/320, 370/335, 370/441, 370/431, 370208-209, 370/350, 370/341, 370/503, 370/514, 370/329, 370/479, 370/342, 455/442, 455/522, 455/132, 455/436, 455/561
• US Class Current: 375/146
• CPC Class Codes: H04B 1/7075 with code phase acquisition
• CPC Class Codes: H04B 3/00 Line transmission systems combined with near-field transmission systems H04B5/00
• CPC Class Codes: H04J 13/00 Code division multiplex systems for frequency hopping H04B1/713

Abstract

A wired spread spectrum communication device, a method for communication thereof and a wired spread spectrum communication system capable of enabling easy establishment of synchronism are disclosed. In a transmitter unit of the wired spread spectrum communication device, a spreading code generator generates spread spectrum signals that are based on specified spreading codes, a strobe signal generator and a timing gate output the spread spectrum signals as sync signals at specified timings, and an adder superposes the sync signals to the spread information signals, while the adder further sends the information signals that have been superposed with the sync signals as transmitting signals to transmission paths.

Claims

1. A wired spread spectrum communication device comprises:

a wired information signal port which introduces information signals consisting of base bands into wired channels,

a sine wave signal generator which generates specified sine wave signals;

an information spread spreading means comprising a spread code generating means and a modulator for each channel, which generates spread spectrum signals for spreading said information signals on the basis of specified spreading codes by multiplying said specified spreading codes,

a sync signal generating means comprising a sync spread code generating means, a modulator and a timing gate, which intermittently outputs spread spectrum signals that have been generated by the sync spread code generating means and modulated by multiplying with said sine wave signals by said modulator, at specified timings controlled by said timing gate as sync signals,

a superposing means which superposes the sync signals that have been output from the sync signal generating means to the spread information signals, and

a transmitting means which sends the spread information signals, which have been superposed with the sync signals by the superposing means, to wired transmission paths.

2. The wired spread spectrum communication device as claimed in claim 1, wherein the specified timings are arbitrary timings for outputting one or more sync signal within a single cycle of a spreading code for spreading the information signals, or outputting one sync signal.

3. A wired spread spectrum communication method in which

different information signals for each of at least two channels that have been spread by information spreading codes from a spread code generator are transmitted through transmission paths, the wired spread spectrum communication method including the steps of outputting spread spectrum signals for each channel that have been generated on the basis of specified spreading codes from a spread code generator for each channel modulated with a modulator for each channel by a sine wave signal from a sine wave signal generator along with sync signals intermittently output at specified timings controlled by a timing gate, superposing the sync signals to the different information signals that have been spread by said information spreading codes and transmitting them out to the transmission paths,

wherein the sync signals are generated by multiplying with a multiplier the specified spreading codes with sine wave signals.

4. The wired spread spectrum communication method as claimed in claim 3, wherein the specified timings are arbitrary timings for outputting one or more sync signals within a single cycle of a spreading code for spreading the information signals, or one sync signal within a plurality of cycles of the spreading codes for spreading the information signals.