An improved UWB frequency-shifted Gaussian waveform pulse design method

Abstract

The invention relates to the field of ultra-wide-band pulse waveform design, and particularly discloses an improved ultra-wide-band frequency shift Gaussian waveform pulse design method. The improved ultra-wide-band frequency shift Gaussian waveform pulse design method comprises the steps of: firstly, dividing 0 to 12GHz of UWB (ultra-wide-band) frequency spectrum into 4 to 6 sub frequency bands, and determining a center frequency for each sub frequency band; selecting one Gaussian function as a main pulse function; and respectively multiplying the main pulse function by sine carrier waves with different sub-frequency-band center frequencies to obtain a plurality of multipliers, and after multiplying each multiplier by an optimal weighting coefficient which enables a utilization rate of an ultra-wide-band pulse power spectrum to be optimal, adding the obtained products to obtain an ultra-wide-band pulse. The ultra-wide-band pulse generated by the improved ultra-wide-band frequency shift Gaussian waveform pulse design method disclosed by the invention is high in power spectrum utilization rate and long in transmission distance when being applied to radiation masking regulated by FCC (Federal Communications Commission).

Description

technical field [0001] The invention belongs to the field of ultra-wideband pulse waveform design and relates to an improved ultra-wideband frequency shift Gaussian waveform pulse design method. Background technique [0002] An ultra-wideband (Ultra-Wideband, UWB) wireless communication system uses nanosecond-level ultrashort pulses as information carriers, and carries digital information to be transmitted by modulating narrow pulses. This technology has the advantages of large communication capacity, low transmission power, strong anti-multipath interference ability, simple structure and good confidentiality. Currently, the only radiation masking standard available in UWB radio communications is that of the US Federal Communications Commission (FCC) [FCC, 2002]. For indoor UWB systems, the masking limit is aimed at -10dB bandwidth in the range of 3.1-10.6GHz, and there are strict restrictions on out-of-band radiation masking. According to FCC's requirements for radiation ...

AI Technical Summary

Problems solved by technology

Win and Scholtz proposed to use the second-order derivative of the Gaussian function as the pulse waveform of the pulse radio system, which overcomes the shortcomings of the Gaussian pulse containing a DC component and the radiation efficiency is not high; The orthogonality of order polynomial reduces multi-user interference; Sheng et al. proposed an algorithm to select the optimal differential order and optimal formation factor of Gaussian pulses and make them approach radiation masking, but it is difficult to efficiently use a single pulse At the same time, Parr obtained two pulses, that is, Parr pulses, through the method of eigenvalue decomposition digital filter from the frequency domain. Most of the pulse energy designed by this method is concentrated in the range of 3.1-10.6GHz. It better meets the spectrum requirements and has flexibility. Different spectrum limits correspond to different bandpass filters; Zhang Honggang et al. proposed to use the approximate prolate ellipsoidal wave function (PSWF) as the pulse of DS~UWB, the pulse has orthogonal Completeness and can achieve flexible spectrum control; Rui Chen proposed the method of linear combination of Rayleigh pulse and its derivatives to generate pulse; Starting from the frequency domain to ensure that the waveform of the time-domain pulse meets the FCC spectrum masking, this method has significant flexibility and is widely used; Zhendong Yin et al. proposed a new pulse waveform design for WDM ultra-wideband wireless communication systems, and its related Performance and bit error rate (BER) are significantly improved, approaching single-user systems

[0005] When the ultra-wideband pulse obtained by the current design method is applied to the spectrum masking of FCC, the power spectral density utilization rate is low and the transmission distance is short

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