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Method and equipment for controlling power of personal hand held phone system

A power control, hand-held phone technology, applied in the direction of transmission control/equalization, etc., can solve problems such as closed-loop power control implementation obstacles, insufficient power control supported by wireless protocols, etc., to solve the power temperature compensation problem, adjust the step size flexibly, reduce cost effect

Inactive Publication Date: 2006-12-06
上海乾视通信技术有限公司
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Problems solved by technology

On the other hand, the wireless protocol of the PHS system also has obvious deficiencies in supporting power control, which has brought obstacles to the realization of closed-loop power control

Method used

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  • Method and equipment for controlling power of personal hand held phone system
  • Method and equipment for controlling power of personal hand held phone system
  • Method and equipment for controlling power of personal hand held phone system

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with specific embodiments and accompanying drawings.

[0023] The present invention realizes the downlink power control, first according to the ambient temperature (adjustable temperature range: -35 degrees to +60 degrees), simultaneously adjusts the output power of each channel of the system within a relatively large range (such as adjustment range: +2.5 to -1DB) . Afterwards, each channel uses an optimized software algorithm to decide whether to further fine-tune the power according to its own call situation (call quality), and the adjustment range is within a relatively small range (such as 1DB).

[0024] 1. Adjust the power according to the ambient temperature

[0025] The main devices used in RF circuits are analog devices, and their operating characteristics have a great relationship with temperature. Large-scale changes in ambient temperature will cause large fluctuations in the transmission...

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Abstract

The method includes steps: obtaining coefficient of temperature compensation from ambient temperature and empirical value; using the coefficient to control amplitude of baseband signal, and further to control emission power of system. The equipment includes module of temperature collection and processor, module for processing code element in baseband, digital up converter, and D / A converter. The invention implements power control at base band, providing high precision for temperature compensation of power. Moreover, the invention removes complicated compensation circuit in radio frequency so as to simplify system and reduce cost. Features are: easy controlled flexible adjustment of step size, reduced interference between systems, raised system capacity etc.

Description

technical field [0001] The invention relates to a method for realizing power control of a personal handheld telephone system (PHS system) wireless communication base station equipment. Background technique [0002] For wireless communication equipment, with the change of ambient temperature, the output power is easy to fluctuate, and the fluctuation range is often large, which cannot meet the requirements of system design. Therefore, it is usually necessary to implement temperature compensation in the radio frequency power control circuit to ensure that the output power of the device remains relatively stable within a large temperature range. Some power control temperature compensation circuits are implemented in the radio frequency part, using temperature sensitive circuits to measure the external temperature, obtaining corresponding temperature compensation signals according to temperature changes, and outputting them to the automatic power control circuit to change the ou...

Claims

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Application Information

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IPC IPC(8): H04B7/005
Inventor 李业刘兵余程钢
Owner 上海乾视通信技术有限公司
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