無線寬帶OFDM信號的陣列化接收機(jī)制設(shè)計與優(yōu)化
發(fā)布時間：2018-08-09 16:01
【摘要】：無線網(wǎng)絡(luò)性能的提升,一直是學(xué)術(shù)界和產(chǎn)業(yè)界關(guān)注的熱點(diǎn)問題。二十一世紀(jì)已經(jīng)正式進(jìn)入信息時代,人們的日常生活對信息交互、數(shù)據(jù)傳輸?shù)囊蕾嚦潭惹八从小o線通信終端種類和數(shù)目越來越多,無線通信數(shù)據(jù)傳輸量與日俱增,數(shù)據(jù)產(chǎn)生和傳播的增長速度已經(jīng)遠(yuǎn)遠(yuǎn)超過了無線通信技術(shù)的發(fā)展速度,給無線通信系統(tǒng)的傳輸速率能力帶來了極大的挑戰(zhàn)。增加無線通信的帶寬是能夠大幅提升無線通信速率的最直接和最有效的手段。近年來,無線通信已經(jīng)呈現(xiàn)的明顯的寬帶化趨勢,無線信道帶寬的量級已經(jīng)從MHz量級走向GHz量級,再到sub-THz量級,這一趨勢還將持續(xù)維持。傳統(tǒng)的無線通信收發(fā)機(jī)制依靠增加單個設(shè)備的通信帶寬來實現(xiàn)高速率無線通信傳輸,硬件實現(xiàn)復(fù)雜度隨之增高。受限于當(dāng)前的濾波器、ADC等硬件制造水平,用傳統(tǒng)設(shè)計思路實現(xiàn)GHz量級的無線信號的接收,造價極高、難度極大。針對傳統(tǒng)無線接收機(jī)制實現(xiàn)寬帶高速無線通信面臨的挑戰(zhàn),本文創(chuàng)新的提出了一種針對無線寬帶OFDM信號的陣列化接收機(jī)制STTGR,并對其進(jìn)行了優(yōu)化。STTGR是一種軟件和硬件結(jié)合的信號接收機(jī)制,基本思路是,前端利用固定、有限帶寬的窄帶設(shè)備陣列作為硬件前端,設(shè)計“窄帶拼寬帶”的數(shù)據(jù)融合算法進(jìn)行后處理,實現(xiàn)無線寬帶OFDM信號的接收。本文的主要工作和創(chuàng)新點(diǎn)為:1)STTGR陣列化接收機(jī)制的設(shè)計。突破當(dāng)前無線通信接收端只能在固定帶寬工作的局限性,設(shè)計了一種帶寬可擴(kuò)展的陣列化無線信號接收機(jī)制STTGR,為新一代無線通信的發(fā)展提供了創(chuàng)新思路。STTGR的基本思想是利用多個窄帶設(shè)備組成接收陣列,每個窄帶設(shè)備處理寬帶信號一個子頻帶上的信號,再利用軟件算法實現(xiàn)時間對齊、數(shù)據(jù)融合等后處理,實現(xiàn)寬帶信號的全頻段覆蓋接收。STTGR是一種軟件和硬件結(jié)合的信號接收機(jī)制,通過軟件處理實現(xiàn)后期數(shù)據(jù)處理,降低了硬件實現(xiàn)復(fù)雜度。第三章給出了該機(jī)制設(shè)計方案、理論推導(dǎo)及仿真實驗結(jié)果。2)STTGR陣列化接收機(jī)制的優(yōu)化。將陣列中的窄帶設(shè)備視為多個用戶,陣列化接收的問題轉(zhuǎn)化為多用戶協(xié)作接收的問題。借鑒多用戶分集的思想,充分利用無線信道的選擇性衰落特性和多用戶動態(tài)性,按照優(yōu)化目標(biāo)在陣列中窄帶設(shè)備之間重新分配寬帶OFDM信號的子載波,對本文提出的陣列化接收機(jī)制STTGR提出兩種優(yōu)化方案和四種優(yōu)化算法。一種優(yōu)化方案是最小化傳輸誤比特率,設(shè)計了基于貪心策略的子載波分配算法和輪回分配子載波算法;另一種優(yōu)化方案是優(yōu)化系統(tǒng)的功率利用率,設(shè)計了基于遺傳算法的子載波分配算法和基于粒子群優(yōu)化的子載波分配算法。第四章給出了設(shè)計的優(yōu)化算法、理論推導(dǎo)及和仿真實驗結(jié)果。本文的設(shè)計的陣列化接收機(jī)制STTGR主要特點(diǎn)是,接收帶寬可擴(kuò)展,設(shè)備規(guī)模可伸縮,具有面向未來無線通信的可持續(xù)發(fā)展能力,能夠從根本上解決無線通信面臨的挑戰(zhàn)。研究成果有望成為無線通信領(lǐng)域的原創(chuàng)性技術(shù)突破,為寬帶通信提供研究思路和技術(shù)支撐,具有重要的理論意義和工程價值,應(yīng)用前景廣闊。
[Abstract]:The enhancement of wireless network performance has always been a hot issue in the academic and industrial circles. In twenty-first Century, it entered the information age. People's daily life has an unprecedented dependence on information interaction and data transmission. The variety and number of wireless communication terminals are increasing, and the amount of data transmission in wireless communication is increasing with the day. The growth rate of birth and communication has far exceeded the speed of wireless communication technology, which has brought great challenges to the transmission rate capability of wireless communication systems. Increasing the bandwidth of wireless communication is the most direct and effective means to greatly improve the rate of wireless communication. With the trend of transformation, the magnitude of the wireless channel bandwidth has gone from MHz to the order of GHz, and then to the magnitude of sub-THz. This trend will continue to maintain. The traditional wireless communication and transceiver mechanism relies on increasing the communication bandwidth of a single device to achieve high rate wireless communication transmission, and the complexity of hardware implementation increases. Limited to the current filter, ADC Such as the level of hardware manufacturing, using traditional design ideas to realize the reception of GHz level wireless signals, the cost is very high and the difficulty is very difficult. In view of the challenges facing the traditional wireless receiving mechanism to realize broadband and high-speed wireless communication, a new array receiving mechanism for wireless broadband OFDM signals, STTGR, is proposed, and.S is optimized. TTGR is a combination of software and hardware signal receiving mechanism, the basic idea is that the front end uses a fixed, limited bandwidth narrow band device array as a hardware front end, and designs a "narrow band" data fusion algorithm for post-processing, realizing wireless broadband OFDM signal receiving. The main work and innovation of this paper are: 1) STTGR array The design of receiving mechanism, breaking through the limitation that the current wireless receiver can only work in fixed bandwidth, designed a bandwidth extensible array wireless signal receiving mechanism STTGR, which provides an innovative idea for the development of a new generation of wireless communications. The basic idea of.STTGR is to make use of multiple narrow band devices to form a receiving array, each narrow. With the equipment processing the signal in a subband of broadband signal, and using software algorithm to realize time alignment, data fusion and so on, the full band coverage receiving.STTGR of broadband signal is a kind of signal receiving mechanism combined with software and hardware, and the later data processing is realized through software processing, and the complexity of hardware implementation is reduced. The three chapter gives the design scheme of the mechanism, the theoretical deduction and the result of the simulation experiment.2) the optimization of the STTGR array receiving mechanism. The narrowband devices in the array are regarded as multiple users, and the problem of array reception is transformed into the problem of multi user cooperation receiving. As well as multiuser dynamics, two optimization schemes and four optimization algorithms are proposed for the array reception mechanism proposed in this paper by redistributing the subcarriers of the wideband OFDM signal between the narrowband devices in the array. One optimization scheme is to minimize the transmission error rate, and designs a subcarrier allocation based on the greedy strategy. The subcarrier algorithm of the method and the cycle distribution; another optimization scheme is to optimize the power utilization of the system. The subcarrier allocation algorithm based on genetic algorithm and the sub carrier allocation algorithm based on particle swarm optimization are designed. The fourth chapter gives the design optimization algorithm, the theoretical deduction and the simulation experiment results. The array reception of the design in this paper is designed. The main features of the mechanism STTGR are that the receiving bandwidth is extensible, the scale of the equipment is scalable, the sustainable development ability facing the future wireless communication and the challenge to the wireless communication can be solved fundamentally. The research results are expected to be the original technological breakthrough in the field of wireless communication, and provide research ideas and technical support for broadband communication. It has important theoretical significance and engineering value, and has broad application prospects.
【學(xué)位授予單位】：國防科學(xué)技術(shù)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN929.53
本文編號：2174604
[Abstract]:The enhancement of wireless network performance has always been a hot issue in the academic and industrial circles. In twenty-first Century, it entered the information age. People's daily life has an unprecedented dependence on information interaction and data transmission. The variety and number of wireless communication terminals are increasing, and the amount of data transmission in wireless communication is increasing with the day. The growth rate of birth and communication has far exceeded the speed of wireless communication technology, which has brought great challenges to the transmission rate capability of wireless communication systems. Increasing the bandwidth of wireless communication is the most direct and effective means to greatly improve the rate of wireless communication. With the trend of transformation, the magnitude of the wireless channel bandwidth has gone from MHz to the order of GHz, and then to the magnitude of sub-THz. This trend will continue to maintain. The traditional wireless communication and transceiver mechanism relies on increasing the communication bandwidth of a single device to achieve high rate wireless communication transmission, and the complexity of hardware implementation increases. Limited to the current filter, ADC Such as the level of hardware manufacturing, using traditional design ideas to realize the reception of GHz level wireless signals, the cost is very high and the difficulty is very difficult. In view of the challenges facing the traditional wireless receiving mechanism to realize broadband and high-speed wireless communication, a new array receiving mechanism for wireless broadband OFDM signals, STTGR, is proposed, and.S is optimized. TTGR is a combination of software and hardware signal receiving mechanism, the basic idea is that the front end uses a fixed, limited bandwidth narrow band device array as a hardware front end, and designs a "narrow band" data fusion algorithm for post-processing, realizing wireless broadband OFDM signal receiving. The main work and innovation of this paper are: 1) STTGR array The design of receiving mechanism, breaking through the limitation that the current wireless receiver can only work in fixed bandwidth, designed a bandwidth extensible array wireless signal receiving mechanism STTGR, which provides an innovative idea for the development of a new generation of wireless communications. The basic idea of.STTGR is to make use of multiple narrow band devices to form a receiving array, each narrow. With the equipment processing the signal in a subband of broadband signal, and using software algorithm to realize time alignment, data fusion and so on, the full band coverage receiving.STTGR of broadband signal is a kind of signal receiving mechanism combined with software and hardware, and the later data processing is realized through software processing, and the complexity of hardware implementation is reduced. The three chapter gives the design scheme of the mechanism, the theoretical deduction and the result of the simulation experiment.2) the optimization of the STTGR array receiving mechanism. The narrowband devices in the array are regarded as multiple users, and the problem of array reception is transformed into the problem of multi user cooperation receiving. As well as multiuser dynamics, two optimization schemes and four optimization algorithms are proposed for the array reception mechanism proposed in this paper by redistributing the subcarriers of the wideband OFDM signal between the narrowband devices in the array. One optimization scheme is to minimize the transmission error rate, and designs a subcarrier allocation based on the greedy strategy. The subcarrier algorithm of the method and the cycle distribution; another optimization scheme is to optimize the power utilization of the system. The subcarrier allocation algorithm based on genetic algorithm and the sub carrier allocation algorithm based on particle swarm optimization are designed. The fourth chapter gives the design optimization algorithm, the theoretical deduction and the simulation experiment results. The array reception of the design in this paper is designed. The main features of the mechanism STTGR are that the receiving bandwidth is extensible, the scale of the equipment is scalable, the sustainable development ability facing the future wireless communication and the challenge to the wireless communication can be solved fundamentally. The research results are expected to be the original technological breakthrough in the field of wireless communication, and provide research ideas and technical support for broadband communication. It has important theoretical significance and engineering value, and has broad application prospects.
【學(xué)位授予單位】：國防科學(xué)技術(shù)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN929.53
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