Quasi-coherent pulse ultra-wideband receiver and signal demodulation method

An ultra-wideband receiver and coherent pulse technology, applied in electrical components, transmission systems, etc., can solve the problems of increasing system power consumption and difficulty in applying low-power application scenarios, and achieve the effect of strong resistance

Active Publication Date: 2021-06-25
TSINGHUA UNIV
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Problems solved by technology

Although the coherent pulse ultra-wideband receiver has strong resistance to non-ideal factors such as narrowband interference and multipath effects, it requires a high-precision

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  • Quasi-coherent pulse ultra-wideband receiver and signal demodulation method
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  • Quasi-coherent pulse ultra-wideband receiver and signal demodulation method

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[0043] Next, the technical solutions in the embodiments of the present invention will be apparent from the embodiment of the present invention, and it is clearly described, and it is understood that the described embodiments are merely embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, there are all other embodiments obtained without making creative labor without making creative labor premises.

[0044] As described in the background, see figure 1 The conventional non-coaxial ultra-wideband receiver structure is simple, and the radio frequency signal is first amplified by a broadband low noise amplifier, and the mixed module performs self-mixing operation of the amplified signal and feeds the resulting signal into the low pass filter. The second and higher harmonic components are filtered after passing through the low pass filter, and the pulse baseband signal can be directly recovered. However, the non-coat pulse u...

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Abstract

The invention provides a quasi-coherent pulse ultra-wideband receiver. The received radio frequency signal is decomposed into two paths of orthogonal signals after being down-converted into low and intermediate frequencies; therefore, even if the quality of the radio frequency local oscillation signal is not high, the influence of the frequency error can be eliminated after the two paths of orthogonal signals are subjected to square addition; the demodulation performance of the quasi-coherent pulse ultra-wideband receiver is not sensitive to a phase error and a frequency error between a radio frequency signal and a radio frequency local oscillation signal. According to the invention, a high-quality radio frequency local oscillation signal is not needed, a high-precision frequency synthesizer and a high-speed analog-digital converter are not needed, and the equipment is suitable for a low-power-consumption application scene. In addition, the capability of resisting non-ideal factors such as narrow-band interference is high. The invention further provides a signal demodulation method which is applied to the quasi-coherent pulse ultra-wideband receiver.

Description

technical field [0001] The invention relates to the technical field of low-power wireless communication, and more specifically, to a quasi-coherent pulse ultra-wideband receiver and a signal demodulation method. Background technique [0002] The pulse ultra-wideband signal is based on the principle of time-frequency domain transformation (the narrower the pulse of the signal in the time domain, the wider the bandwidth in the frequency domain), the data is generated by modulating the physical parameters (amplitude, phase, position, etc.) of the short pulse pulsed UWB radio frequency signal. The advantage of transmitting pulsed ultra-wideband signals is that the circuit can save system power consumption and improve system energy efficiency through intermittent operation, and is suitable for low-power wireless communication fields. [0003] Conventional non-coherent pulsed UWB receivers can directly recover the pulsed baseband signal by self-mixing the amplified RF signal. Ho...

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Application Information

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IPC IPC(8): H04B1/10H04B1/30
CPCH04B1/1027H04B1/1036H04B1/1081H04B1/30H04B2001/307
Inventor 李宇根汪博闻王志华
Owner TSINGHUA UNIV
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