Channel order and RMS delay spread estimation for AC power line communications

Hongbin Li, Zhaoqiang Bi, Duixian Liu, Jian Li, Petre Stoica

Research output: Contribution to conferencePaperpeer-review

4 Scopus citations

Abstract

AC power lines have been considered as a convenient and low-cost medium for intra-building automation systems. In this paper, we investigate the problem of estimating the channel order and root mean squared (RMS) delay spread associated with the power lines, which are channel parameters that provide important information for determining the data transmission rate and designing appropriate equalization techniques for power lines communications (PLC). We start by showing that the key to the RMS delay spread estimation problem is the determination of the channel order, i.e., the effective duration of the channel impulse response. We next discuss various ways to estimate the impulse response length from a noise-corrupted channel estimate. In particular, four different methods, namely a signal energy estimation (SEE) technique, a generalized Akaike information criterion (GAIC) based test, a generalized likelihood ratio test (GLRT), and a modified GLRT, are derived for determining the effective length of a signal contaminated by noise. These methods are compared with one another using both simulated and experimentally measured power line data. The experimental data was collected for power line characterization in frequencies between 1 and 60 MHz.

Original languageEnglish
Pages229-233
Number of pages5
StatePublished - 2000
EventProceedings of the 10th IEEE Workshop on Statiscal and Array Processing - Pennsylvania, PA, USA
Duration: 14 Aug 200016 Aug 2000

Conference

ConferenceProceedings of the 10th IEEE Workshop on Statiscal and Array Processing
CityPennsylvania, PA, USA
Period14/08/0016/08/00

Fingerprint

Dive into the research topics of 'Channel order and RMS delay spread estimation for AC power line communications'. Together they form a unique fingerprint.

Cite this