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Impulse wireless ultra-wideband rake reception and decision method in high-speed mobile environment

A high-speed mobile, ultra-broadband technology, applied in electrical components, transmission systems, etc., can solve the problems of complex receiving and judgment methods, and achieve the effect of improving bit error rate performance and simple method.

Active Publication Date: 2017-05-03
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0004] In order to overcome the complex shortcomings of the existing pulse wireless ultra-wideband RAKE receiving and judging methods, the present invention provides a pulse wireless ultra-wideband RAKE receiving and judging method in a high-speed mobile environment

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  • Impulse wireless ultra-wideband rake reception and decision method in high-speed mobile environment
  • Impulse wireless ultra-wideband rake reception and decision method in high-speed mobile environment
  • Impulse wireless ultra-wideband rake reception and decision method in high-speed mobile environment

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Embodiment Construction

[0042] Refer to Figure 1-6. The specific steps of the pulse wireless ultra-wideband RAKE receiving and decision method in the high-speed mobile environment of the present invention are as follows:

[0043] (A) Acquisition of scale conversion factor a.

[0044] Considering the similarity between the UAV channel and the indoor line-of-sight channel, the channel model adopts the line-of-sight channel in the indoor environment, and the pulse width is about T P = 2ns, the spectrum range is 0~2GHz. The spectral amplitude of the pulse does not consider the restriction of the specification, because in the actual system, there are filtering and shaping and power amplification modules at the back of the pulse waveform. The system modulation adopts BPSK modulation. It is assumed that the relative velocity of the transmitter and receiver is the radial velocity, and the relative velocity is v=216Km / s, the interval T between adjacent preamble symbols at the transmitting end t =2.5ms, system sam...

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Abstract

The invention discloses a pulse radio ultra-wideband RAKE receiving and judging method in a high-speed mobile environment, and aims to solve the technical problem that a conventional pulse radio ultra-wideband RAKE receiving and judging method is complex. According to the technical scheme, the method comprises the following steps: sending data information bits according to a block structure, sending a data block to a receiving end through a channel after pulse is shaped, and obtaining a template signal vd (t) of an RAKE receiver after the receiving end is subjected to channel estimation; according to estimated doppler dimension change factors, carrying out doppler compensation for the template signal vd (t), so as to obtain a new RAKE receiving template signal v (t); carrying out RAKE receiving and judgment, so as to obtain sent information. The method estimates the dimension change factors by inserting pilot signals among block signals, and then utilizes the dimension change factors to determine the influence brought by the fact that the template signal is repeatedly collected in a repeated collection cycle to compensate the dopper effect. The method is simple and can greatly improve the bit error rate performance in the high-speed environment.

Description

Technical field [0001] The present invention relates to a pulse wireless ultra-wideband RAKE receiving and decision method, in particular to a pulse wireless ultra-wideband RAKE receiving and decision method in a high-speed mobile environment. Background technique [0002] The literature "Method of doppler estimation for ir-uwb-system based on the rake-receiver," in 2010 IEEE International Conference on Ultra-Wideband, 2010, pp. 1–5. The block transmission mechanism of inserting the preamble signal is specifically analyzed in the ultra-wideband. Various factors of the Doppler effect that affect the performance of the broadband system, and finally the concept of scale conversion factor is proposed, but the compensation method for the Doppler effect is too complicated. [0003] The document "A computationally efficient doppler compensation system for underwater acoustic commu-nications," Oceanic Engineering, IEEE Journal of, vol. 25, no. 1, pp. 52–61, 2000, gives an example of Dopple...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/7115
Inventor 左晓亚袁建平张若南罗建军
Owner NORTHWESTERN POLYTECHNICAL UNIV
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