Wireless sensor network application-oriented low-power consumption radio frequency receiving and sending device

Abstract

The invention discloses a wireless sensor network application-oriented low-power consumption radio frequency receiving and sending device which comprises a duplexer, a radio frequency front end, a variable gain complex filter, an automatic frequency tuning circuit, a programmable gain amplifier, a phase-locked loop frequency synthesizer, a digital processor, a storage, a variable gain power amplifier, a mixer and a low pass filter, wherein the duplexer, the radio frequency front end, the variable gain complex filter, the automatic frequency tuning circuit and the programmable gain amplifier form a receiving link which is used for receiving and processing a radio frequency signal and converting the radio frequency signal into a low-medium frequency digital signal so that the signal can be conveniently processed by a subsequent analog-digital converter later; the duplexer, the variable gain power amplifier, the mixer and the low pass filter form an emitting link which is used for mixing a baseband analog modulation signal into a carrier frequency and sending a wireless signal; and the receiving link and the emitting link share the duplexer. The wireless sensor network application-oriented low-power consumption radio frequency receiving and sending device realizes singlechip integration by adopting a standard CMOS (Complementary Metal Oxide Semiconductor) process, is simple in structure and low in power consumption, and is applicable to a wireless sensor network.

Description

technical field [0001] The invention relates to the field of wireless radio frequency transceiver technology, in particular to a wireless sensor network, which requires low power consumption, low cost, low transceiver rate and high receiving sensitivity, and is a low-power radio frequency transceiver device for wireless sensor network applications. Background technique [0002] The wireless sensor network is mainly aimed at low-speed wireless communication in the short-distance range, and has been widely used in the fields of industrial monitoring, environmental monitoring, smart home, medical care, and public safety. In order to prolong the battery life and reduce the cost of battery replacement , It is usually required that the power consumption of the transceiver must be very low, so integrating a low-power RF transceiver on a standard CMOS process is a key technology. [0003] For the consideration of low cost and low power consumption, the structure of direct down-conve...

AI Technical Summary

Problems solved by technology

For the transmitter, the direct up-conversion transmitter structure can achieve better transmission efficiency and performance, and can meet different modulation signal transmissions. It can transmit both constant envelope signals and non-constant envelope signals. The lock-based The transmitter structure of the phase loop modulation can only transmit the constant envelope signal

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