無(wú)線寬帶OFDM信號(hào)的陣列化接收機(jī)制設(shè)計(jì)與優(yōu)化
發(fā)布時(shí)間：2018-08-09 16:01
【摘要】：無(wú)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(wèn)題。二十一世紀(jì)已經(jīng)正式進(jìn)入信息時(shí)代,人們的日常生活對(duì)信息交互、數(shù)據(jù)傳輸?shù)囊蕾嚦潭惹八从�。無(wú)線通信終端種類和數(shù)目越來(lái)越多,無(wú)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(zhǎng)速度已經(jīng)遠(yuǎn)遠(yuǎn)超過(guò)了無(wú)線通信技術(shù)的發(fā)展速度,給無(wú)線通信系統(tǒng)的傳輸速率能力帶來(lái)了極大的挑戰(zhàn)。增加無(wú)線通信的帶寬是能夠大幅提升無(wú)線通信速率的最直接和最有效的手段。近年來(lái),無(wú)線通信已經(jīng)呈現(xiàn)的明顯的寬帶化趨勢(shì),無(wú)線信道帶寬的量級(jí)已經(jīng)從MHz量級(jí)走向GHz量級(jí),再到sub-THz量級(jí),這一趨勢(shì)還將持續(xù)維持。傳統(tǒng)的無(wú)線通信收發(fā)機(jī)制依靠增加單個(gè)設(shè)備的通信帶寬來(lái)實(shí)現(xiàn)高速率無(wú)線通信傳輸,硬件實(shí)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(jì)思路實(shí)現(xiàn)GHz量級(jí)的無(wú)線信號(hào)的接收,造價(jià)極高、難度極大。針對(duì)傳統(tǒng)無(wú)線接收機(jī)制實(shí)現(xiàn)寬帶高速無(wú)線通信面臨的挑戰(zhàn),本文創(chuàng)新的提出了一種針對(duì)無(wú)線寬帶OFDM信號(hào)的陣列化接收機(jī)制STTGR,并對(duì)其進(jìn)行了優(yōu)化。STTGR是一種軟件和硬件結(jié)合的信號(hào)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(jì)“窄帶拼寬帶”的數(shù)據(jù)融合算法進(jìn)行后處理,實(shí)現(xiàn)無(wú)線寬帶OFDM信號(hào)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(jì)。突破當(dāng)前無(wú)線通信接收端只能在固定帶寬工作的局限性,設(shè)計(jì)了一種帶寬可擴(kuò)展的陣列化無(wú)線信號(hào)接收機(jī)制STTGR,為新一代無(wú)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(gè)窄帶設(shè)備組成接收陣列,每個(gè)窄帶設(shè)備處理寬帶信號(hào)一個(gè)子頻帶上的信號(hào),再利用軟件算法實(shí)現(xiàn)時(shí)間對(duì)齊、數(shù)據(jù)融合等后處理,實(shí)現(xiàn)寬帶信號(hào)的全頻段覆蓋接收。STTGR是一種軟件和硬件結(jié)合的信號(hào)接收機(jī)制,通過(guò)軟件處理實(shí)現(xiàn)后期數(shù)據(jù)處理,降低了硬件實(shí)現(xiàn)復(fù)雜度。第三章給出了該機(jī)制設(shè)計(jì)方案、理論推導(dǎo)及仿真實(shí)驗(yàn)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(gè)用戶,陣列化接收的問(wèn)題轉(zhuǎn)化為多用戶協(xié)作接收的問(wèn)題。借鑒多用戶分集的思想,充分利用無(wú)線信道的選擇性衰落特性和多用戶動(dòng)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(hào)的子載波,對(duì)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(jì)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(jì)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(jì)的優(yōu)化算法、理論推導(dǎo)及和仿真實(shí)驗(yàn)結(jié)果。本文的設(shè)計(jì)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)�？缮炜s,具有面向未來(lái)無(wú)線通信的可持續(xù)發(fā)展能力,能夠從根本上解決無(wú)線通信面臨的挑戰(zhàn)。研究成果有望成為無(wú)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(jià)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(guó)防科學(xué)技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN929.53
本文編號(hào)：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(guó)防科學(xué)技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN929.53
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