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Radio frequency head end device for wireless sensor network node application

A wireless sensor and network node technology, applied in the direction of radio/inductive link selection arrangement, selection device, transmission system, etc., can solve the problem of poor real-time performance of transmission power and small signal amplifier gain adjustment, single power management, and slow RF front-end state switching etc. to achieve the effect of solving slow switching time, improving flexibility, and ensuring frequency switching

Active Publication Date: 2007-08-29
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In view of this, the main purpose of the present invention is to provide a radio frequency front-end device for wireless sensor network node applications, to solve the current wireless sensor network node radio frequency front-end state switching slow, transmit power and small signal amplifier gain adjustment real-time poor, single power supply Management and other shortcomings, to achieve the purpose of real-time dynamic management of the RF front-end module power supply, real-time adjustment of the RF front-end transmit power, small signal amplifier gain, and RF front-end state switching time according to the next state estimated by the upper layer

Method used

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  • Radio frequency head end device for wireless sensor network node application
  • Radio frequency head end device for wireless sensor network node application
  • Radio frequency head end device for wireless sensor network node application

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Embodiment

[0054] In this embodiment, a solution applied to an actual wireless sensor network node is taken as an example. Please refer to Fig. 2, the baseband part can be realized by the existing programmable logic device (FPGA) or a dedicated baseband processing chip; the microprocessor can be implemented by an embedded low-power processor, such as ATmeg128L.

[0055] The distributed power supply control unit 10 is connected to the processor through the processor interface, and is connected to each unit of the radio frequency front end unit 16 except the antenna, mainly determines the power supply status of each module of the radio frequency front end according to the upper layer protocol (processor), and When the state of the RF front-end is switched, the units are sequentially turned off or turned on to reduce the startup power consumption or state switching power consumption caused by a single power supply.

[0056] The frequency synthesizer loop filter control unit 12 is connected ...

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Abstract

The front-end device in radio frequency (RF) includes following units: distribution type control unit in use for carrying out distribution type power supply control for each unit in front-end unit (FEU) in RF in order to reduce starting up power consumption, and idle consumption; a control unit for bias of small signal amplifier in use for controlling gain of small signal amplifier in FEU in RF; a loop filter control unit of frequency synthesizer in use for controlling time for switching frequency of frequency synthesizer in FEU in RF in order to reduce waste of energy sources under switch states of FEU in RF; a control unit for bias of power amplifier in use for controlling the output power of power amplifier in FEU in RF. Comparing with prior art, the invention solves issues of switching states slowly, poor real-time capability to adjust gains of transmitting power and small signal amplifier, and single power supply management.

Description

technical field [0001] The invention relates to the technical field of wireless sensor networks, in particular to a radio frequency front-end device for wireless sensor network node applications. Background technique [0002] Wireless sensor network (WSN) is an emerging cutting-edge research hotspot technology that has attracted much attention in the world. Wireless sensor network technology integrates microelectronics technology, sensor technology, embedded computing technology, wireless network communication technology, distributed information processing technology and micro-electromechanical technology (MEMS), etc. , Perceive and collect information of various environments or monitoring objects, process the information through the embedded system, and transmit the information to end users through a random self-organizing wireless communication network in a multi-hop relay manner, thereby realizing ubiquitous computing idea. [0003] In 2003, when the United States "Tech...

Claims

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Application Information

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IPC IPC(8): H04L12/02H04B1/38H04Q7/30H04L12/28H04B1/40
CPCY02B60/50
Inventor 阚保强谢磊徐勇军李晓维
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI
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