Wireless sensor network receiver

Abstract

The invention discloses a wireless sensor network receiver, which comprises an antenna, N cascaded low noise amplifiers, a double-input-end mixer, an analog baseband filter and a digital baseband demodulator, wherein the antenna is used for receiving frequency signals transmitted from a wireless sensor network transmitter; the N cascaded low noise amplifiers are used for performing preamplification and one-time bandpass filtering on the frequency signals received from the antenna; the double-input-end mixer is used for performing frequency mixing on the signals filtered by the low noise amplifiers; the analog baseband filter is used for performing secondary bandpass filtering on the signals mixed by the mixer; the digital baseband demodulator is used for demodulating the signals filtered by the analog baseband filter to acquire data signals and clock signals; and the output ends of the N-1th low noise amplifier and the Nth low noise amplifier are connected with the two input ends of the mixer respectively. The wireless sensor network receiver has the advantages of low bit error rate and high receiving sensitivity.

Description

technical field [0001] The invention relates to a wireless sensor network system, in particular to a wireless sensor network receiver. Background technique [0002] Wireless sensor network is a comprehensive intelligent information system integrating information collection, information transmission and information processing. It has a very broad application prospect. Its development and application have far-reaching influence and significance on various fields of human life and production. A wireless sensor network consists of a large number of sensor nodes with small size, low cost, and independent wireless communication, sensing, and data processing capabilities. [0003] At present, one of the mainstream receiver systems of wireless sensor networks is the ultra-wideband short pulse receiver system. For the UWB short pulse receiver, one of the most important technical difficulties is how to solve the interference problem of frequencies outside the effective bandwidth sign...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned ultra-wideband short pulse wireless sensor network receiver, the interference signal other than the ultra-wideband short pulse signal frequency (i.e. the interference frequency signal other than the effective signal frequency) is mainly suppressed by the analog baseband filter, because the two input terminals of the mixer Both are connected to the last stage output of the low-noise amplifier, and the low-noise amplifier can suppress the interference frequency signal other than the effective signal frequency weakly, so that the receiving bit error rate of the wireless sensor network receiver is relatively large, so that the wireless sensor Reduced sensitivity of network receivers

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