Simple Algorithms for Estimating the Symbol Timing Offset in DCT‐Based Multicarrier Systems

Abstract

Multicarrier modulation based on discrete cosine transform (DCT-MCM) is a candidate technique for future wireless communication. DCT-MCM provides a better usage of the spectrum, allowing for much lower out-of-band radiation than conventional OFDM. In this paper, we address the problem of correcting the symbol timing offset in DCT-MCM. Two sliding window-based correlation algorithms are proposed. The new approaches consider a prefix and a suffix that are inserted into each data symbol, which are the replica of part of the useful data. The performance of the proposed approaches is verified and tested, and their usefulness and effectiveness are illustrated by computer simulations.

Efficient and Privacy-Preserving Outsourcing of 2D-DCT and 2D-IDCT

“…In addition to the general orthogonal transform properties of DCT, the basis vector of its transform matrix can well describe the relevant features of image signals and human voice signals. Therefore, DCT is considered to be a quasioptimal tool for transforming image and voice signals and is widely used in various fields such as media compression [1]- [3], digital watermarking [4]- [6], and wireless communication [7,8]. 2D-DCT can directly transform two-dimensional data, so it is quite suitable for the analysis and processing of two-dimensional signals, such as static images.…”