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配用电泛在业务盲区通信子载波干扰抑制方法 被引量:4
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作者 冯奕军 冼庆祺 《沈阳工业大学学报》 CAS 北大核心 2021年第4期378-383,共6页
为确保配用电网正常运行,提高电力企业业务水平,提出了配用电泛在业务盲区通信子载波干扰抑制方法.在不同配用电业务类型下构建信道特征模型,利用子空间算法计算接收信号的自相关函数确定业务盲区;通过子载波干扰概率密度分布函数计算... 为确保配用电网正常运行,提高电力企业业务水平,提出了配用电泛在业务盲区通信子载波干扰抑制方法.在不同配用电业务类型下构建信道特征模型,利用子空间算法计算接收信号的自相关函数确定业务盲区;通过子载波干扰概率密度分布函数计算噪声功率,设定抗干扰门限值去除噪声,实现子载波干扰抑制.仿真结果表明,该方法可以去除信道中96%以上的噪声,通信接收端的星座图区域划分明显,在BRE水平更低的情况下,信号传输功率差异较小.所提方法可以有效抑制子载波干扰,提高通信成功率. 展开更多
关键词 配用电 泛在业务 通信子载波 干扰抑制 多径传播 信道模型 噪声空间 抗干扰门限
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Non-Orthogonal Multi-Carrier Transmission for Internet via Satellite 被引量:3
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作者 Yang Yang Lidong Zhu 《China Communications》 SCIE CSCD 2017年第3期31-42,共12页
As the important complementary to terrestrial mobile communications, Internet via satellite can extend the coverage of communication and improve the continuity of data services. To build a space-terrestrial integrated... As the important complementary to terrestrial mobile communications, Internet via satellite can extend the coverage of communication and improve the continuity of data services. To build a space-terrestrial integrated communication system is the inevitable trend in the future. Taking into account combination of 5th generation(5G) terrestrial mobile communication system and satellite communication system, it is necessary to evaluate the promising 5G air interface waveform which can be adopted by satellite. In this paper, several non-orthogonal multi-carrier transmission schemes are evaluated and generalized frequency division multiplexing(GFDM) is advised as potential scheme of space-terrestrial integrated communication system. After the overview of GFDM, the implementation of GFDM transceiver is discussed respectively in time-domain and in frequency-domain. By deriving and comparing implementation complexity, GFDM modulation in time-domain is more suitable for satellite communication system. Then the properties of demodulation algorithms are specified. Based on designed pilot subcarriers, a new improved receiving algorithm is proposed in the end of the paper. The improved algorithm solves the problem of inter subcarriers interference(ICI) in matched filtering(MF) receiver and improves the re-ceiving symbol error rate(SER) obviously. The simulation and analysis prove that the proposed algorithm is effective. 展开更多
关键词 Internet via satellite air interface non-orthogonal modulation interference cancellation
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Bit Loading Algorithm of VSF-OFCDM wireless communication
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作者 Xu Maotong 《International Journal of Technology Management》 2013年第2期113-117,共5页
In VSF-OFCDM wireless communication, wireless channel is divided into component channels with the same frequency space according to the frequency, and the carriers on component channels are mutually orthogonal. When t... In VSF-OFCDM wireless communication, wireless channel is divided into component channels with the same frequency space according to the frequency, and the carriers on component channels are mutually orthogonal. When there are enough subcarriers, the bandwidth efficiency of the system is close to nyquist limit, which can ensure the utilization ratio of system frequency. Therefore, under the premise of ensuring orthogonal division of channels, the channels received a secondary division according to data rate requirements and power limit of business to make the frequency resource fully used and makes the total power minimal, which realizes the optimal distribution of wireless-communication system resources. The secondary division is represented by bit loading algorithm the best bit number of subcarrier allocation in symbol period. For the characteristics of wide-band multi-media services and granular division of VSF-OFCDM wireless communication, the subject proposes the idea of business-oriented subcarrier allocation, which means that the subcarriers are divided in symbol period with the business as the dominant. Based on the idea, the paper designs service-oriented bit loading algorithm of subcarrier, byte and power combined with distribution based on channel detection, and makes verification and performance analysis on the algorithm. 展开更多
关键词 VSF-OFCDM wireless communication loadilag algorithm
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