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OPPM-UWB (overlapping pulse position modulation-ultra wide band) communication method on basis of time reversal technology

A technology for time inversion and signal inversion, applied in electrical components, transmission systems, etc., can solve problems such as increasing receivers, suppressing multipath environment, etc., and achieve the effect of reducing inter-symbol interference and reducing bit error rate

Inactive Publication Date: 2012-01-25
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the methods proposed now are based on complex calculations or increasing the complexity of the receiver, and cannot use simple operations to suppress the influence of the multipath environment

Method used

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  • OPPM-UWB (overlapping pulse position modulation-ultra wide band) communication method on basis of time reversal technology
  • OPPM-UWB (overlapping pulse position modulation-ultra wide band) communication method on basis of time reversal technology
  • OPPM-UWB (overlapping pulse position modulation-ultra wide band) communication method on basis of time reversal technology

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] A kind of OPPM-UWB wireless communication method based on time reversal technology, comprises the following steps:

[0022] Step 1: The receiving end first determines the modulated pulse x(t) of the corresponding pulse width according to the transmission rate of OPPM-UWB wireless communication and sends it out. After the modulated pulse x(t) is transmitted through the multipath wireless channel, set the received The signal is y(t), and then the sending end performs time inversion operation on the received signal y(t) to obtain the inversion signal s(t)=y(T-t), where T is the length of the received signal.

[0023] Step 2: The sending end uses the inversion signal s(t) obtained in Step 1 as a modulated pulse for suppressing multipath interference to perform OPPM modulation on the information to be sent and send it.

[0024] Step 3: The receiving end receives the...

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Abstract

The invention relates to an OPPM-UWB (overlapping pulse position modulation-ultra wide band) communication method on the basis of a time reversal technology and belongs to the technical field of wireless communication. In the technical scheme, the OPPM-UWB communication method comprises the following steps that: in the step 1, firstly a receiving end determines a modulating pulse x(t) with the corresponding pulse width according a transmission rate of OPPM-UMB wireless communication and sends the modulating pulse x(t), and then a sending end carries out time reversal operation on a receiving signal y(t) to obtain a reversal signal s(t); in the step 2, the sending end carries out OPPM modulation on information which needs to be sent by using the reversal signal s(t) as a modulating pulse for inhibiting multipath interference and sends the information; and in the step 3, the receiving end receives an OPPM modulating signal, then carries out modulation and decoding on the received signal and reduces the sent information. In the OPPM-UWB communication method, the time reversal technology is introduced in the OPPM modulation; and the intersymbol interference caused by multipath delay can be reduced by utilizing the self-adaptive focusing characteristic of the time reversal signal, so that the bit error rate of a system is reduced. Due to the adoption of the OPPM-UWB communication method, the interference inhibition of a multipath channel can be realized without improving the complexity of a receiver or carrying out complex signal processing.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a Time Reversal (TR) wireless communication technology and an Ultra Wide Band (UWB) communication method of Overlapping Pulse Position Modulation (OPPM). Background technique [0002] In ultra-wideband (UWB) communication, overlapping pulse position modulation (OPPM) is an extension of pulse position modulation (PPM), which is obtained by allowing overlap between pulse positions without shortening the pulse width or There is no scaling of system bandwidth. Compared with PPM modulation, OPPM modulation can obtain higher system capacity and communication rate, but due to the destruction of OPPM orthogonality, its demodulation error probability has increased; especially the multipath environment has a greater impact on OPPM modulation. In an indoor dense multipath channel, the signal is subject to frequency selective fading, and the signal energy is extended beyond sev...

Claims

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Application Information

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IPC IPC(8): H04B1/719H04B1/7176
Inventor 王秉中臧锐葛广顶章志敏
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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