Adaptive path selection threshold setting for ds-cdma receivers

Details Adaptive path selection threshold setting for ds-cdma receivers Adaptive path selection threshold setting for ds-cdma receivers

H - Electricity

04

B

H04B 1/7103 (2011.01) H04B 7/08 (2006.01)

Patent

CA 2342158

A system and method for detecting and selecting peaks in a delay power profile (DPP) signal. An adaptive threshold is used to determine valid paths in the DPP signal. The adaptive threshold is determined by measuring the signal-to- noise ratio of the DPP signal, and setting the threshold to minimize non- detections and false alarms in path estimation. To determine the signal-to- noise ratio, the system uses an iterative process wherein a raw estimate and an improved estimate are made of the noise.

La présente invention concerne un dispositif et un procédé de détection et de sélection de pics dans un signal de profil de puissance à retardement (DPP). Le seuil adaptatif est utilisé afin de déterminer des voies valides dans le signal DPP. Ce seuil adaptatif est déterminé en mesurant le rapport du signal sur bruit du signal DPP, et en établissant le seuil afin de minimiser des non détections ainsi que des fausses alarmes dans l'estimation de voie. Afin de déterminer le rapport signal sur bruit, le dispositif utilise un procédé itératif dans lequel sont effectuées une estimation brute et une estimation améliorée du bruit.

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