Method, system and feedback equipment for terminal power detection

A power detection and terminal technology, applied in power management, transmission system, transmission monitoring and other directions, can solve the problems of power detection accuracy, stability deviation, beyond the detection range of HDET network, etc., to improve the accuracy and stability, and expand the detection range Effect

Active Publication Date: 2009-06-17
HUAWEI DEVICE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the attenuation value of the attenuation network is a fixed value, the power range of the WCDMA transmission power coupled from the power coupler to the HDET network through the attenuation network may exceed the detection range of the HDET network
The entire power dynamic range of WCDMA mobile terminal transmission is close to 80dB (the maximum output power is 24dBm, the minimum transmission power is -50dBm). With the current power detection scheme, HDET power detection and closed-loop control can only be performed at the maximum power output, while other power The output part is only obtained by looking up the table, so that there is a certain deviation in the accuracy and stability of power detection

Method used

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  • Method, system and feedback equipment for terminal power detection
  • Method, system and feedback equipment for terminal power detection

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Embodiment 1

[0031] see figure 1 , an embodiment of the present invention provides a power control system in a WCDMA terminal, which specifically includes a main transmitting device 101 and a feedback device 102 interconnected with the main transmitting device, wherein:

[0032] The main transmitting device 101 is used to receive the baseband modulated power signal, perform frequency conversion, amplification and coupling, and transmit it to the base station through the antenna; at the same time, a part of the power signal is coupled according to the coupling coefficient and sent to the feedback device 102 .

[0033] The main transmitting device 101 specifically includes:

[0034] The transmitting chip 101a is used to receive the digital signal after baseband modulation, perform up-conversion and pre-amplification on the received digital signal to obtain a high-frequency power signal, and send the high-frequency power signal to the power amplifier 101b;

[0035] The power amplifier 101b i...

Embodiment 2

[0058] see image 3 , the embodiment of the present invention also provides a feedback device, which is applied to a mobile terminal, and specifically includes: a digitally controlled attenuator 301, a maximum power detection network 302, and a baseband control chip 303, wherein the maximum power detection network 302 is connected to the digitally controlled attenuator 301 and the The baseband control chip 303 is connected, and the numerically controlled attenuator is also connected with the baseband control chip 303 through a control line,

[0059] The digitally controlled attenuator 301 has a plurality of attenuation branches, and is used to gate an attenuation branch according to the received control signal of the baseband control chip, and attenuate the coupling power signal output by the main transmitting device;

[0060] The maximum power detection network 302 is used to detect the power of the attenuated power signal;

[0061] The baseband control chip 303 is used to r...

Embodiment 3

[0081] see Figure 4 , an embodiment of the present invention provides a method for terminal power detection, including:

[0082] 401: Coupling the current power signal of the terminal according to the power coupling coefficient to obtain a power coupling signal;

[0083] 402: Obtain an attenuation branch switching signal, perform power attenuation on the power coupling signal according to the switching signal, and obtain an attenuated power signal;

[0084] 403: Detect the power value of the attenuated power signal, and obtain a current power signal value of the terminal according to the power value, the coupling coefficient, and the power attenuation amount.

[0085] The method in the embodiment of the present invention performs closed-loop control according to the last actual transmitted signal power value of the terminal and the base station's requirement for terminal power adjustment. The application of the above terminal power detection method in terminal power control ...

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Abstract

The invention discloses a method a system and a feedback device for detecting the terminal power, which belongs to the field of wireless communication. The method comprises the following steps: coupling current terminal power signals according to the power coupling parameter, obtaining the power coupling signals, obtaining the switching signals of an attenuation branch line, carrying out the power attenuation to the power coupling signals according to the switching signals, obtaining attenuation power signals, detecting the power value of the attenuation power signals, and obtaining the current terminal power signal value according to the power value, the coupling parameter and the power attenuation quantity. The system comprises a main transmitting device and the feedback device which is mutually connected with the main transmitting device. The device comprises a numeral control attenuator, a maximum power detecting network and a base band control chip, wherein the maximum power detecting network is respectively connected with the numeral control attenuator and the base band control chip, and the numeral control attenuator is further connected with the base band control chip through a control wire. The invention improves the accuracy and the stability of the terminal power detection.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a terminal power detection method, system and feedback device. Background technique [0002] The third generation wireless communication system WCDMA (Wideband Code Division Multiple Access, wideband code division multiple access) is a wideband direct spread spectrum code multiple In) the pseudo-random bits obtained from the spreading code are multiplied, so as to extend the user information bits to a wider bandwidth. From this point of view, the WCDMA system is a self-interference system, so fast and accurate power control is the basic requirement to ensure the performance of the WCDMA system, especially in the uplink, if there is no accurate terminal power control, the over-power transmission The mobile terminal will block the entire cell. [0003] WCDMA power control includes: open-loop power control, closed-loop power control and outer-loop power control, the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/04H04B17/00H04B17/318
Inventor 张和平汪海
Owner HUAWEI DEVICE CO LTD
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