Synchronization for VDSL system using DMT 


Vol. 27,  No. 10, pp. 951-962, Oct.  2002


PDF
  Abstract

A DMT transceiver recovers the sampling time from reserved sub- carriers, the pilots. Since the pilots are available after the FFT, the symbol synchronization must be done before sample synchronization. In DMT VDSL system, symbol synchronization is handled separately from sample synchronization, although the two processes are intimately related. The DMT symbol itself contains sufficient information, the cyclic extension, for symbol synchronization. Using only the sign bit of received signal, the Maximum Likelihood Estimation solution is derived. The Tx windowing in the transmiuer of DMT VDSL system results in the blurring of MLE peaks. We propose the weighted summing MLE method using the sign bit which produces the clearly sharp top of MLE peaks. The stability of symbol synchronization is improved significantly by averaging over a few symbols. This paper presents the study of the original MLE and the weighted summing MLE using sign bit. A clock difference between transmiuer and receiver destroys the orthogonality of the carriers. Therefore, a receiver using asynchronous sampling must perform timing correction in the discrete-time domain. We introduce an efficient digital sample synchronization method which is based on temporal and frequency domain digital signal processing.

  Statistics
Cumulative Counts from November, 2022
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.


  Cite this article

[IEEE Style]

B. Choi, J. Woo, G. Im, "Synchronization for VDSL system using DMT," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 10, pp. 951-962, 2002. DOI: .

[ACM Style]

Byung-ik Choi, Jung-Soo Woo, and Gi-Hong Im. 2002. Synchronization for VDSL system using DMT. The Journal of Korean Institute of Communications and Information Sciences, 27, 10, (2002), 951-962. DOI: .

[KICS Style]

Byung-ik Choi, Jung-Soo Woo, Gi-Hong Im, "Synchronization for VDSL system using DMT," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 10, pp. 951-962, 10. 2002.

Search
(IN TITLE, AUTHOR, ABSTRACT,KEYWORDS)

Advanced Search ▼

POPULAR KEYWORDS
(TOP 10 KEYWORDS)

Recent Publications
(LAST 3 YEARS)






pISSN : 1226 - 4717
eISSN : 2287 - 3880