A quasi-coherent pulse ultra-wideband receiver and signal demodulation method
An ultra-wideband receiver and coherent pulse technology, applied in the transmission system, electrical components, etc., can solve the problems of increasing system power consumption and difficult to apply low power consumption application scenarios, and achieve the effect of strong resistance
Active Publication Date: 2022-04-12
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 frequency synthesizer and a high-speed analog-to-digital converter, which greatly increases system power consumption and is difficult to apply to Low Power Application Scenarios
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[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0044] As mentioned in the Background Art, see figure 1 , the conventional incoherent pulse ultra-wideband receiver has a simple structure, the radio frequency signal is first amplified by a wideband low-noise amplifier, and the self-mixing module performs self-mixing operation on the amplified signal and sends the obtained signal to a low-pass filter. The second and above harmonic components are filtered out after passing through a low-pass filter, and the pu...
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The invention provides a quasi-coherent pulse ultra-wideband receiver, which decomposes the received radio frequency signal into two orthogonal signals after being down-converted to a low intermediate frequency, so that even if the quality of the radio frequency local oscillation signal is not high, the two orthogonal After the signals are squared and added, the influence of the frequency error will also be eliminated. The demodulation performance of the quasi-coherent pulse UWB receiver is insensitive to the phase error and frequency error between the RF signal and the RF local oscillation signal, that is, no high frequency error is required. The high-quality RF local oscillator signal does not require high-precision frequency synthesizers and high-speed analog-to-digital converters, and is suitable for low-power application scenarios. And it has strong resistance to non-ideal factors such as narrowband interference. The invention also provides a signal demodulation method applied to a 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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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