电力线信道是一种非常严苛的有线信道,不仅具有时变性和频率选择性,还存在大量的背景噪声和脉冲噪声,严重影响信号的传输质量。为构建智能电网,抵抗电力线信道的影响,文章将具有优良误码性能的正交频分复用索引调制(orthogonal frequenc...电力线信道是一种非常严苛的有线信道,不仅具有时变性和频率选择性,还存在大量的背景噪声和脉冲噪声,严重影响信号的传输质量。为构建智能电网,抵抗电力线信道的影响,文章将具有优良误码性能的正交频分复用索引调制(orthogonal frequency division multiplexing with index modulation,OFDM-IM)应用至电力线通信,并选择信道增益较大的载波进行索引调制,以提高电力线信道下信号的传输质量。首先对电力线传输信道进行多径建模,对脉冲噪声进行Bernoulli-Gaussian过程建模,然后详细介绍了OFDM-IM的调制解调方案,并研究了该方案在电力线信道下的误码性能,最终与传统的OFDM方案在电力线信道下进行误码性能比较。实验结果表明,在电力线信道下OFDM-IM比OFDM具有更优的误码性能。展开更多
With the advance of wireless communication technologies, small-size and high-performance computing and communication devices are increasingly used in daily life. After the success of second generation mobile system, m...With the advance of wireless communication technologies, small-size and high-performance computing and communication devices are increasingly used in daily life. After the success of second generation mobile system, more interest was started in wireless communications. A Mobile Ad hoc Network (MANET) is a wireless network without any fixed infrastructure or centralized control;it contains mobile nodes that are connected dynamically in an arbitrary manner. The Mobile Ad hoc Networks are essentially suitable when infrastructure is not present or difficult or costly to setup or when network setup is to be done quickly within a short period, they are very attractive for tactical communication in the military and rescue missions. They are also expected to play an important role in the civilian for as convention centers, conferences, and elec-tronic classrooms. The clustering is an important research area in mobile ad hoc networks because it im-proves the performance of flexibility and scalability when network size is huge with high mobility. All mo-bile nodes operate on battery power;hence, the power consumption becomes an important issue in Mobile Ad hoc Network. In this article we proposed an Energy Aware Clustered-Based Multipath Routing (EACMR), which forms several clusters, finds energy aware node-disjoint multiple routes from a source to destination and increases the network life time by using optimal routes.展开更多
文摘电力线信道是一种非常严苛的有线信道,不仅具有时变性和频率选择性,还存在大量的背景噪声和脉冲噪声,严重影响信号的传输质量。为构建智能电网,抵抗电力线信道的影响,文章将具有优良误码性能的正交频分复用索引调制(orthogonal frequency division multiplexing with index modulation,OFDM-IM)应用至电力线通信,并选择信道增益较大的载波进行索引调制,以提高电力线信道下信号的传输质量。首先对电力线传输信道进行多径建模,对脉冲噪声进行Bernoulli-Gaussian过程建模,然后详细介绍了OFDM-IM的调制解调方案,并研究了该方案在电力线信道下的误码性能,最终与传统的OFDM方案在电力线信道下进行误码性能比较。实验结果表明,在电力线信道下OFDM-IM比OFDM具有更优的误码性能。
文摘With the advance of wireless communication technologies, small-size and high-performance computing and communication devices are increasingly used in daily life. After the success of second generation mobile system, more interest was started in wireless communications. A Mobile Ad hoc Network (MANET) is a wireless network without any fixed infrastructure or centralized control;it contains mobile nodes that are connected dynamically in an arbitrary manner. The Mobile Ad hoc Networks are essentially suitable when infrastructure is not present or difficult or costly to setup or when network setup is to be done quickly within a short period, they are very attractive for tactical communication in the military and rescue missions. They are also expected to play an important role in the civilian for as convention centers, conferences, and elec-tronic classrooms. The clustering is an important research area in mobile ad hoc networks because it im-proves the performance of flexibility and scalability when network size is huge with high mobility. All mo-bile nodes operate on battery power;hence, the power consumption becomes an important issue in Mobile Ad hoc Network. In this article we proposed an Energy Aware Clustered-Based Multipath Routing (EACMR), which forms several clusters, finds energy aware node-disjoint multiple routes from a source to destination and increases the network life time by using optimal routes.
