An ultra-low power undersampling receiver for wireless communication nodes

Abstract

The invention relates to an ultra-low power consumption undersampling receiver for a wireless communication node. A radio frequency matching network is used for achieving impedance matching between a radio frequency front end and an antenna; a pseudo-differential low noise amplifier is used for achieving and ensuring a high gain and low noise and simultaneously, converting a single-ended input signal of the radio frequency matching network into an differential output signal; an undersampling frequency mixer is used for carrying out undersampling frequency conversion on the radio frequency differential signal to a low-intermediate frequency and dividing the signal into two paths for output; two paths of signals respectively and sequentially pass through respective intermediate frequency amplifiers, digital filters and comparators; the intermediate frequency amplifiers are used for filtering and amplifying the weak low-intermediate frequency; the digital filters are used for filtering out clutter signals and further extracting and sampling variable frequency signals; the comparators are used for demodulating to achieve signal processing; and a clock generator is used for generating clock control signals and using the clock control signals as clocks of the sampling frequency mixer and the digital filters. The ultra-low power consumption undersampling receiver has great advantages of power consumption and noise.

Description

Technical field [0001] The present invention relates to the technical field of low power consumption of wireless communication nodes, in particular to an ultra-low power consumption under-sampling receiver for wireless communication nodes. Background technique [0002] In recent decades, with the rapid development of science and technology and the increasing demand for communication, the importance of wireless communication technology has become more and more obvious. Various communication systems continue to appear, such as the IEEE International Industrial, Scientific and Medical ISM WLAN wireless communication system, whose frequency range covers the radio frequency band. The wireless communication chip technology plays a vital role in these complex and huge wireless communication systems, and the wireless receiver chip is the most difficult part to overcome in the wireless communication transceiver chip. In order to meet large-scale applications, the current wireless communi...

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Problems solved by technology

[0004] Although the reported receivers have reduced power consumption to a certain extent, at the expense of system noise and sensitivity

At the same time, domestic and foreign spectrum divisions and related standard agreements are different, and domestic research on related RF low-power receiver chips is relatively lacking.

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