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Multi mega-bit per second data transmission over in-building power lines.

机译：通过室内电力线每秒传输数兆位数据。

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摘要

Motivated by applications in home networking and the convenience of a pre-installed infrastructure, the aim of this work is to study the feasibility of multi mega-bit per second data transmission over in-building power lines.;Power line channels are modelled in this work as linear time-invariant systems with additive noise. Based on restrictions placed on possible wiring configurations by the U.S. national electric code, as well as the physical structure and size of buildings, a channel simulator was developed. The simulator generates a random wiring structure and computes the channel transfer function and capacity between two randomly chosen wall-outlets. This process was repeated many times and a channel capacity distribution was found. This modelling approach suggests that with a transmit power of 1 mW, data transmission in the range of 24 Mbps and 67 Mbps should be feasible in 99% and 80% of all channels respectively.;Regulatory constraints place limitations on the radiated electric field strength from communication signals imposed on power lines. A relatively simple method for computing radiated electric field has been introduced. The new capacity distribution, limited by FCC regulations, shows that 90% of channels have a capacity greater than 94 Mbps.;A comparison between three modulation techniques namely single-carrier, multi-carrier and spread spectrum was made. It was verified that multi-carrier modulation is more suitable for power line communications. Specific values for different parameters of a multi-carrier modulation, such as the number of sub-channels and the length of cyclic-prefix, were proposed. Also a simplified approximate FFT/IFFT which is suitable to use in multi-carrier modulation was proposed. The proposed FFT/IFFT reduces the required area for adders and multipliers by a percentage between 20% to 72%.;An error control coding technique suitable for power line, as well as other band limited high SNR channels, was developed. The developed technique combines the excellent error correction capability of low-density parity check (LDPC) codes, and good performance of multilevel codes in high SNR channels. The simulation results for power line channels showed that the system can operate within a 1 dB SNR gap from the channel capacity.
机译：受家庭网络中的应用程序和预装基础结构的便利性的推动，这项工作的目的是研究通过建筑物内电力线每秒传输数兆位数据的可行性。用作带有附加噪声的线性时不变系统。基于美国国家电气法规对可能的布线配置以及建筑物的物理结构和大小的限制，开发了通道模拟器。该模拟器生成随机的布线结构，并计算两个随机选择的壁式插座之间的通道传递函数和容量。重复此过程很多次，并发现了信道容量分布。这种建模方法表明，在发射功率为1 mW的情况下，分别在所有通道的99％和80％范围内分别在24 Mbps和67 Mbps范围内进行数据传输应该是可行的;监管约束限制了来自以下方面的辐射电场强度电力线上的通信信号。已经介绍了一种相对简单的计算辐射电场的方法。新的容量分布受FCC法规的限制，表明90％的信道的容量大于94 Mbps。;比较了单载波，多载波和扩频这三种调制技术。证实了多载波调制更适合于电力线通信。提出了针对多载波调制的不同参数的特定值，例如子信道数和循环前缀的长度。还提出了适合用于多载波调制的简化的近似FFT / IFFT。提出的FFT / IFFT将加法器和乘法器所需的面积减少了20％到72％之间的百分比。；开发了一种适用于电力线以及其他带宽受限的高SNR通道的误差控制编码技术。这项开发的技术结合了低密度奇偶校验（LDPC）码的出色纠错能力，以及在高SNR通道中多级码的良好性能。电力线通道的仿真结果表明，该系统可以在通道容量的1 dB SNR间隙内运行。

著录项

  • 作者

    Esmailian, Tooraj.;

  • 作者单位

    University of Toronto (Canada).;

  • 授予单位 University of Toronto (Canada).;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2003
  • 页码 190 p.
  • 总页数 190
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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