Punctured Bent Function Sequences for Watermarked DS-CDMA

Min Kyu Song, Gangsan Kim, Hong Yeop Song, Ki Won Song

Research output: Contribution to journalArticle

Abstract

In this letter, we investigate the effect of inserting some randomly generated watermarking chips into known spreading sequences in terms of periodic correlations; moreover, we give two design criteria for good watermarked sequences in the sense of: 1) reducing the average correlation value and 2) minimizing the variance of correlations. For n = 2m with even m, we propose a set of 2m-1 punctured bent function sequences of length 2n-1 punctured by the Singer difference set. The maximum non-trivial correlation magnitude of the proposed set turns out to be 2m+1, which is asymptotically two times the Welch bound.

Original languageEnglish
Article number8708242
Pages (from-to)1194-1197
Number of pages4
JournalIEEE Communications Letters
Volume23
Issue number7
DOIs
Publication statusPublished - 2019 Jul

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering

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