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Implementing method of ultra-wideband orthogonal forming pulse

A technology of shaping pulses and implementation methods, which is applied in the field of communication, can solve problems such as low spectrum utilization, failure to guarantee waveform orthogonality, and failure to guarantee pulse orthogonality, etc., so as to improve spectrum utilization, increase system capacity, and improve correlation The effect of the characteristic

Inactive Publication Date: 2008-10-15
BEIJING JIAOTONG UNIV
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Problems solved by technology

Traditional Gaussian pulses, raised cosine pulses, Hermitian polynomial pulses and other waveforms have the disadvantages of low spectrum utilization and the inability to guarantee the orthogonality between waveforms; the wavelet function is used to generate pulse waveforms, and then the Hermitian matrix is ​​constructed. According to its eigenvectors and Gram -Schmit process to get UWB quadrature shaped pulse, this method solves the problem of multiple access, but cannot flexibly suppress co-channel interference; the method of stacking and compressing Chirp pulses has a high spectrum utilization rate, and can flexibly suppress co-channel interference, but it cannot be guaranteed Orthogonality between pulses, so it cannot support multiple users working at the same time
The method that can suppress co-frequency interference with other narrowband systems generally requires that the division of subbands must be uniform, it is difficult to suppress the mutual interference between UWB and WLAN, and it cannot meet the requirements of cognitive radio adaptively changing the frequency band

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  • Implementing method of ultra-wideband orthogonal forming pulse
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  • Implementing method of ultra-wideband orthogonal forming pulse

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] A UWB quadrature pulse implementation method for suppressing interference with WLAN, comprising the following steps:

[0029] (1) Step of generating sub-band short-time pulses: using a surface acoustic wave (SAW) device to generate Chirp pulses, and compressing the pulses to the order of magnitude of ns through a matched filter;

[0030] (2) Multiple pulses are superimposed to obtain a UWB pulse step: select the short-time pulse in (1) to superimpose to meet the power spectrum template specified by the UWB standard, and avoid the IEEE 802.11a working frequency band;

[0031] (3) Pulse orthogonalization step: sampling the pulse obtained in (2), constructing a Hermitian matrix, and obtaining UWB orthogonally shaped pulses according to its eigenvectors.

[0032] like figure 1 As shown, the linear Chirp pulse signal is first generated by u...

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Abstract

The invention discloses a method for designing a UWB orthogonal shaping pulse, pertaining to the field of communication. A Chirp pulse is compressed to generate a UWB pulse waveform to establish an Hermitian matrix and then the UWB orthogonal shaping pulse is obtained according to eigenvector. The UWB orthogonal shaping pulse generated by utilizing the method has the advantages of greater design flexibility to better meet the requirement of a spectrum template in the UWB standard, excellent spectrum utilization rate and better relevant characteristics, thereby effectively restraining the co-channel interference with the WLAN (IEEE802.11a).

Description

technical field [0001] The invention relates to a method for realizing ultra-wideband orthogonal shaped pulses, more specifically, to a method for generating ultra-wideband orthogonal pulses based on compressed Chirp pulses and effectively suppressing interference with WLAN, belonging to the technical field of communication. Background technique [0002] Ultra WideBand (UWB) communication technology is an emerging wireless communication technology that has significant differences compared with conventional wireless communication technologies (including narrowband communication and conventional spread spectrum communication). Extensive research and attention. Traditional UWB technology does not use carrier circuits but transmits data by sending nanosecond pulses. FCC's new regulation -10dB relative bandwidth exceeding 20%, or -10dB absolute bandwidth exceeding 500MHz is called ultra-wideband. [0003] UWB radio technology needs to share frequency band resources with other s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/69H04B1/717H04B1/719
Inventor 朱刚张敏王九九烟翔
Owner BEIJING JIAOTONG UNIV
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