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Method and system for detecting power of CDMA (code-division multiple access) 2,000 and EVDO (evolution-data optimized) mixed signals

A mixed signal and power detection technology, which is applied in the transmission system, transmission monitoring, electrical components, etc., can solve the problem of large power detection error

Inactive Publication Date: 2013-11-13
COMBA TELECOM SYST CHINA LTD
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Problems solved by technology

[0004] Based on this, it is necessary to provide a power detection method and system for CDMA2000 and EVDO mixed signals with relatively accurate detection results for the problem of relatively large power detection errors of existing CDMA2000 and EVDO mixed signals

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  • Method and system for detecting power of CDMA (code-division multiple access) 2,000 and EVDO (evolution-data optimized) mixed signals
  • Method and system for detecting power of CDMA (code-division multiple access) 2,000 and EVDO (evolution-data optimized) mixed signals
  • Method and system for detecting power of CDMA (code-division multiple access) 2,000 and EVDO (evolution-data optimized) mixed signals

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Embodiment Construction

[0021] Such as figure 1 Shown, a kind of power detection method of CDMA2000 and EVDO mixed signal, comprises steps:

[0022] In step S110, the mixed signal is subjected to down-conversion processing to obtain an intermediate frequency signal, and the intermediate frequency signal is digitized and converted into a digital signal; in this embodiment, the mixed signal of CDMA2000 and EVDO is subjected to down-conversion processing to obtain a signal without image frequency interference The intermediate frequency signal is digitally processed, and the intermediate frequency signal is converted from an analog signal to a digital signal.

[0023] Step S120, by performing correlation detection on the digital signal, determine the pilot synchronization signal at the pilot position of the EVDO signal in the mixed signal; in this embodiment, the correlation detection method on the digital signal may include The detection of the signal mode of the mixed signal, the detection of the carr...

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Abstract

The invention provides a method and a system for detecting power of CDMA 2,000 and EVDO mixed signals. The system comprises a radio frequency down-conversion device, a digital processing device and a digital control device. A control command is sent by the digital control device to control the radio frequency down-conversion device to perform down-conversion processing on the mixed signals, and then an intermediate frequency signal is obtained; the intermediate frequency signal is converted into a digital signal by the digital processing device, and then the digital signal is subjected to correlation detection, so that a pilot frequency synchronizing signal in the EVDO signal pilot frequency position in the mixed signals is confirmed. An EVDO carrier is emitted with full power, so that the power of a signal in the pilot frequency position is the power of the carrier, and the power of the mixed signals in the pilot frequency position is the actual power of a signal emitted from a base station; and the number of sampling points of the signal power in the pilot frequency position is confirmed according to the pilot frequency synchronizing signal, and the sampling points are accumulated to confirm the power of the mixed signals in the pilot frequency position. With the adoption of the mode, the problems that the power detection of the CDMA 2,000 and EVDO mixed signals is smaller and the fluctuation is larger are solved.

Description

technical field [0001] The invention relates to the field of signal power detection, in particular to a power detection method and system for CDMA2000 and EVDO mixed signals. Background technique [0002] For amplifier equipment such as direct amplifiers, tower amplifiers, or base amplifiers, whether the power of the received base station signal can be accurately detected is the premise of whether the equipment can exert the maximum power amplification effect. At present, CDMA (Code-Division Multiple Access) 2000 base stations generally have the coexistence of EVDO (Evolution-Data Optimized, evolution data optimization) carriers and CDMA2000 carriers. For CDMA2000 carriers, due to the spread spectrum signal power It is relatively stable, and the power detection is relatively simple. It needs to accumulate the signal for a period of time and average it; because the forward link of the EVDO system is time-division multiplexed, a forward physical layer packet can send up to 16 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00H04B17/327
Inventor 郑良黄小锋丁市召
Owner COMBA TELECOM SYST CHINA LTD
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