【摘要】：網(wǎng)絡(luò)服務(wù)資源數(shù)據(jù)的共享策略優(yōu)化設(shè)計(jì),可以有效提高服務(wù)資源的可用性。對(duì)資源數(shù)據(jù)共享策略的設(shè)計(jì),需要獲得各個(gè)偽碼周期內(nèi)起始相位相同的網(wǎng)絡(luò)載波信號(hào),將網(wǎng)絡(luò)信號(hào)功率譜累積平均,完成網(wǎng)絡(luò)服務(wù)資源共享策略的優(yōu)化設(shè)計(jì)。傳統(tǒng)方法進(jìn)行同步信號(hào)的本地相關(guān),獲取網(wǎng)絡(luò)主同步信號(hào)索引,但忽略了將網(wǎng)絡(luò)信號(hào)功率譜累積平均,導(dǎo)致共享數(shù)據(jù)策略設(shè)計(jì)效果不理想。提出基于快速傅里葉變換的網(wǎng)絡(luò)服務(wù)資源數(shù)據(jù)共享策略設(shè)計(jì)方法。對(duì)取樣的中頻信號(hào)進(jìn)行小波濾波預(yù)處理,根據(jù)網(wǎng)絡(luò)中有用信號(hào)與噪聲在小波變換時(shí)所具有的不同特性來(lái)提高信噪比,將網(wǎng)絡(luò)輸入信號(hào)進(jìn)行頻率補(bǔ)償獲得各個(gè)偽碼周期內(nèi)起始相位相同的網(wǎng)絡(luò)載波信號(hào),進(jìn)行傅里葉變換,將網(wǎng)絡(luò)信號(hào)功率譜累積平均,由此實(shí)現(xiàn)對(duì)等模式下網(wǎng)絡(luò)服務(wù)資源數(shù)據(jù)共享策略設(shè)計(jì)。仿真證明,所提方法能夠在保持一定數(shù)據(jù)共享策略性能的同時(shí)有效縮短數(shù)據(jù)共享策略設(shè)計(jì)時(shí)間。
[Abstract]:The optimization design of the sharing strategy of network service resource data can effectively improve the availability of service resources. For the design of resource data sharing strategy, it is necessary to obtain the network carrier signal with the same initial phase in each pseudo-code cycle, and to accumulate the power spectrum of the network signal to achieve the optimal design of the network service resource sharing strategy. The traditional method is used to obtain the local correlation of the synchronization signal and obtain the index of the main synchronous signal of the network, but the cumulative average of the power spectrum of the network signal is neglected, which leads to the unsatisfactory design effect of the shared data strategy. This paper presents a design method of data sharing strategy for network service resources based on fast Fourier transform (FFT). The sampled intermediate frequency signal is preprocessed by wavelet filtering. According to the different characteristics of useful signal and noise in the network in wavelet transform, the SNR can be improved. The network carrier signal with the same initial phase in each pseudo code cycle is obtained by frequency compensation of the network input signal, and the power spectrum of the network signal is accumulatively averaged by Fourier transform. Therefore, the design of network service resource data sharing strategy under peer-to-peer mode is realized. Simulation results show that the proposed method can effectively shorten the design time of the data sharing strategy while maintaining a certain performance of the data sharing strategy.
【作者單位】： 海軍航空工程學(xué)院控制工程系;
【分類號(hào)】：TP393.09

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