Method and apparatus for superimposing and detecting an...

Details Method and apparatus for superimposing and detecting an... Method and apparatus for superimposing and detecting an...

H - Electricity

04

B

H04B 1/69 (2006.01) G11B 20/00 (2006.01) G11B 20/10 (2006.01) H04B 1/707 (2006.01) H04N 5/04 (2006.01) H04N 5/913 (2006.01) H04N 7/08 (2006.01) G11B 23/28 (2006.01)

Patent

CA 2245400

A spectrum spread signal by the spread code synchronized with the synchronous signal accompanied to an information signal is superimposed to the information signal and is then transmitted and the spectrum spread signal is then detected using the spread code for detection synchronized with the synchronous signal from the information signal to which the spectrum spread signal is superimposed. A value of the information signal to which the spectrum spread signal is superimposed is added or subtracted depending on the chip value of the relevant spread code for detection in each chip of the spread code for detection. The spectrum spread signal is detected by, determining whether the added/subtracted value has exceeded the predetermined threshold value or not.

Un signal à étalement du spectre et un code d'étalement sont synchronisés avec le signal isochrone d'un signal d'informantion et sont superposés au signal d'information, puis transmis. Le signal à étalement du spectre est alors détecté en utilisant le code d'étalement de détection qui est synchronisé avec le signal isochrone du signal d'information sur lequel le signal à étalement du spectre est superposé. Une valeur du signal d'information sur lequel est superposé le signal à étalement du spectre est ajoutée ou soustraite selon la valeur du circuit du code d'étalement de détection pertinent dans chacun des circuits du code d'étalement de détection. Le signal à étalement du spectre est détecté en déterminant si la valeur ajoutée/soustraite a surpassé la valeur du seuil prédéterminée ou non.

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