基于超声波的无线携能通信基础研究
发布时间：2018-07-30 08:34
【摘要】：无线携能通信是通信技术与输电技术交叉融合的一个前沿方向,利用相同的频谱并行传输信息与能量,从而充分利用宝贵的能量资源和频率资源。近年来,以无线电波作为媒介的携能通信研究十分火热,而以超声波作为媒介的方式却没有得到足够关注。由于超声波方向性好,穿透能力强,能量集中,无电磁干扰,对人体危害小,超声波无线携能通信在生物医学领域、深海等恶劣环境中具有广泛的应用前景,特别适用于植入式医疗器械以及水下传感网等。因此,超声波无线携能通信具有重要的研究意义和实用价值。本论文首先从超声波的通信机制出发,结合声波特性,研究了超声波通信的调制方式及信道特性,分析了多径衰落、多普勒频移、混响、背景噪声等问题。然后从超声波换能器基础出发,研究了力学声学混合类比电路及其在几种常用电声换能器研究中的应用,分析并提出了超声波换能器的设计要求及设计方法。最后基于以上两点,本论文给出了超声波无线携能通信系统的架构设计,提出了分离式接收机和一体式接收机两种携能接收机架构,在一体式接收机架构中提出了能量调制。研究了动态功率分配机制的三个特例,分别为时间切换、静态功率分配以及开关功率分配,建立了速率-能量折衷模型,并用速率-能量区域表征两类接收机的系统性能。通过改变信道参数,研究了通信速率、输出功率、误码率等关键性能指标。结果表明:在大部分情况下,一体式接收机性能优于分离式接收机;在接收机功耗无法忽略的现实情形下,开关功率分配是两类接收机的最佳性能折衷策略。
[Abstract]:Wireless energy carrying communication is a forward direction of communication technology and transmission technology. It uses the same spectrum to transmit information and energy in parallel so as to make full use of valuable energy and frequency resources. In recent years, the research of portable communication with radio wave as the medium is very hot, but the way of using ultrasonic wave as the medium has not received enough attention. Because of its good directionality, strong penetrating ability, concentrated energy, no electromagnetic interference, and less harm to human body, ultrasonic wireless energy carrying communication has a wide application prospect in biomedical field, deep sea and other adverse environments. It is especially suitable for implantable medical devices and underwater sensor networks. Therefore, ultrasonic wireless portable communication has important research significance and practical value. Based on the communication mechanism of ultrasonic wave and the characteristics of acoustic wave, the modulation mode and channel characteristics of ultrasonic communication are studied in this paper, and the problems of multipath fading, Doppler frequency shift, reverberation and background noise are analyzed. Then, based on the ultrasonic transducer, the mixed analogy circuit of mechanical acoustics and its application in several kinds of electroacoustic transducers are studied. The design requirements and design methods of ultrasonic transducer are analyzed and put forward. Finally, based on the above two points, this paper gives the architecture design of the ultrasonic wireless portable communication system, proposes two kinds of energy carrying receiver architecture: the separate receiver and the integrated receiver, and proposes the energy modulation in the integrated receiver architecture. In this paper, three special cases of dynamic power allocation, namely time switching, static power allocation and switching power allocation, are studied. A rate-energy eclectic model is established, and the system performance of two kinds of receivers is characterized by rate-energy region. By changing the channel parameters, the key performance indexes such as communication rate, output power and bit error rate are studied. The results show that, in most cases, the performance of integrated receiver is better than that of separate receiver, and the switching power allocation is the best performance compromise strategy for the two types of receivers when the power consumption of receiver can not be ignored.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN92
[Abstract]:Wireless energy carrying communication is a forward direction of communication technology and transmission technology. It uses the same spectrum to transmit information and energy in parallel so as to make full use of valuable energy and frequency resources. In recent years, the research of portable communication with radio wave as the medium is very hot, but the way of using ultrasonic wave as the medium has not received enough attention. Because of its good directionality, strong penetrating ability, concentrated energy, no electromagnetic interference, and less harm to human body, ultrasonic wireless energy carrying communication has a wide application prospect in biomedical field, deep sea and other adverse environments. It is especially suitable for implantable medical devices and underwater sensor networks. Therefore, ultrasonic wireless portable communication has important research significance and practical value. Based on the communication mechanism of ultrasonic wave and the characteristics of acoustic wave, the modulation mode and channel characteristics of ultrasonic communication are studied in this paper, and the problems of multipath fading, Doppler frequency shift, reverberation and background noise are analyzed. Then, based on the ultrasonic transducer, the mixed analogy circuit of mechanical acoustics and its application in several kinds of electroacoustic transducers are studied. The design requirements and design methods of ultrasonic transducer are analyzed and put forward. Finally, based on the above two points, this paper gives the architecture design of the ultrasonic wireless portable communication system, proposes two kinds of energy carrying receiver architecture: the separate receiver and the integrated receiver, and proposes the energy modulation in the integrated receiver architecture. In this paper, three special cases of dynamic power allocation, namely time switching, static power allocation and switching power allocation, are studied. A rate-energy eclectic model is established, and the system performance of two kinds of receivers is characterized by rate-energy region. By changing the channel parameters, the key performance indexes such as communication rate, output power and bit error rate are studied. The results show that, in most cases, the performance of integrated receiver is better than that of separate receiver, and the switching power allocation is the best performance compromise strategy for the two types of receivers when the power consumption of receiver can not be ignored.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN92
【参考文献】
相关期刊论文 前10条
1 乔钢;王巍;刘凇佐;Rehan Khan;王s，
本文编号：2154431
本文链接：https://www.wllwen.com/kejilunwen/xinxigongchenglunwen/2154431.html
