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  本文選題：物理層網(wǎng)絡(luò)編碼　切入點(diǎn)：連續(xù)相位調(diào)制　出處：《南京航空航天大學(xué)》2017年碩士論文

【摘要】：近幾年,將網(wǎng)絡(luò)編碼技術(shù)應(yīng)用到物理層所形成的物理層網(wǎng)絡(luò)編碼(Physical-Layer Network Coding)逐漸變?yōu)檠芯康臒狳c(diǎn)。物理層網(wǎng)絡(luò)編碼利用電磁波信號疊加原理,有效地解決了無線通信網(wǎng)絡(luò)中信號相互影響的問題,作為一種新穎的中繼傳輸技術(shù),在吞吐量方面具有巨大優(yōu)勢。物理層網(wǎng)絡(luò)編碼中的信號調(diào)制方式選擇連續(xù)相位調(diào)制(Continuous Phase Modulation),它作為一種常見的非線性調(diào)制,相比于線性調(diào)制,具有頻譜效率高的優(yōu)點(diǎn)�，F(xiàn)有關(guān)于CPM-PNC的檢測算法均采用全響應(yīng)連續(xù)相位調(diào)制(Full Response CPM)信號�；赑NC上PR-CPM的檢測,由于部分響應(yīng)連續(xù)相位調(diào)制(Partial Response CPM)相比FR-CPM有著頻譜利用率更高的優(yōu)點(diǎn)而引起了人們的關(guān)注。本文首先針對單信道點(diǎn)對點(diǎn)系統(tǒng),分別研究了基于FR-CPM和PR-CPM信號的非相干多符號檢測算法,并給出兩種信號的仿真結(jié)果和分析。針對點(diǎn)對點(diǎn)系統(tǒng)中存在吞吐量低,節(jié)點(diǎn)間信息傳遞耗時較大的不足,提出了PNC系統(tǒng)中的FR-CPM非相干多符號檢測算法。但是FR-CPM并不是最佳的綠色調(diào)制方式,PR-CPM相比于FR-CPM,有著頻譜效率和功率效率更高的優(yōu)勢。同時基于Laurent分解的原理,將PR-CPM信號用信號波形線性疊加的方式表示,可降低接收機(jī)的匹配濾波器個數(shù)。因此,又提出了一種基于Laurent分解的PR-CPM-PNC多符號非相干檢測算法。值得注意的是,當(dāng)成型脈沖函數(shù)為矩形時,發(fā)現(xiàn)該算法在檢測過程中存在一種相位模糊的現(xiàn)象。針對PR-CPM-PNC非相干多符號檢測算法存在檢測速率偏低的問題,又提出了PR-CPM-PNC傳統(tǒng)塊檢測算法。但是該算法在提高了檢測速率的同時,會使檢測性能比非相干多符號檢測算法性能降低許多。因此,又提出了一種基于PR-CPM-PNC的非相干塊檢測優(yōu)化算法。該算法不僅有效地改善了傳統(tǒng)塊檢測算法的檢測性能,而且相比于多符號檢測算法,接收機(jī)的檢測速率有了較大地提升。
[Abstract]:In recent years, the application of network coding technology to physical layer network coding has gradually become a hot topic in the field of physical layer network coding (Physical-Layer Network coding).Physical layer network coding effectively solves the problem of signal interaction in wireless communication networks by using the principle of electromagnetic signal superposition. As a novel relay transmission technology, it has a great advantage in throughput.Continuous Phase modulation is chosen as a signal modulation mode in physical layer network coding. As a common nonlinear modulation, it has higher spectral efficiency than linear modulation.All the existing detection algorithms for CPM-PNC adopt full full phase modulation (CCPM) signals.Based on the detection of PR-CPM on PNC, partial phase modulation (CPM) with partial response phase modulation (CPM) has attracted much attention because of its higher spectral efficiency than that of FR-CPM.In this paper, the incoherent multi-symbol detection algorithms based on FR-CPM and PR-CPM signals are studied for single-channel point-to-point systems, and the simulation results and analysis of the two signals are given.Aiming at the shortcomings of low throughput and time-consuming information transfer between nodes in point-to-point systems, a FR-CPM incoherent multi-symbol detection algorithm in PNC systems is proposed.However, FR-CPM is not the best green modulation method. Compared with FR-CPM, PR-CPM has higher spectral efficiency and higher power efficiency.At the same time, based on the principle of Laurent decomposition, the signal of PR-CPM is expressed by linear superposition of signal waveforms, which can reduce the number of matched filters in the receiver.Therefore, a PR-CPM-PNC multi-symbol incoherent detection algorithm based on Laurent decomposition is proposed.It is worth noting that when the shaping pulse function is rectangular, it is found that there is a phenomenon of phase ambiguity in the detection process of the algorithm.Aiming at the problem of low detection rate in PR-CPM-PNC incoherent multi-symbol detection algorithm, a traditional block detection algorithm for PR-CPM-PNC is proposed.However, the performance of the proposed algorithm is much lower than that of the non-coherent multi-symbol detection algorithm.Therefore, an optimization algorithm for incoherent block detection based on PR-CPM-PNC is proposed.This algorithm not only improves the detection performance of the traditional block detection algorithm, but also improves the detection rate of the receiver compared with the multi-symbol detection algorithm.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN911.3

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本文編號：1704162