Patent · US Expired

Signal analyzer and method for displaying power levels of code channels

US7295527B2 · kind B2 · utility

0Cited by

4References

9Claims

0Family size

Assignee

Rohde & Schwarz GmbH & Co. KG · DE

Inventors

Jens Franke · Bad Pyrmont, DE
Bernhard Nitsch · Birkenfeld, DE
Klaus Heller · Gauting, DE

Key dates

Filing date	Apr 29, 2003
Grant date	Nov 13, 2007
Priority date	—
Expiry date	Jan 23, 2024

Classification

Technology area (CPC H)Electricity
CPC primaryH04B7/0613
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

A signal analyzer and a method for displaying code-channel power levels of CDMA (Code Division Multiple Access) signal that contains code changes having different spreading factors. The individual code-channel power level is measured from a received signal and displayed in a diagram for a specified base spreading factor. The code channels having an alias power level are indicated. A code channel, with regard to the specified base spreading factor, has an alias power level when the code channel having the base spreading factor is inactive and when a code channel of a higher spreading factor (corresponding to the former code channel) is active, or, in the event of orthogonal transmit diversity, the power level of a code channel is mapped onto the code channel of the base spreading factor.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.