A blind carrier frequency estimation algorithm for digitally modulated signals

Zaihe Yu, Yun Q. Shi, Wei Su

Research output: Contribution to conferencePaperpeer-review

15 Scopus citations

Abstract

In this paper, we consider estimation of the carrier frequency of a single-tone digitally modulated signal in the automatic modulation recognition (AMR) environment. This issue is quite different from that in the cooperative communications systems since the AMR receiver works in a non-cooperative mode with the transmitter. That is, the AMR receiver does not have any priori knowledge of the transmitted signal such as symbol rate, shaping pulse, modulation type, and constellation size. A blind carrier frequency estimation algorithm is presented in this paper based on the phase information of the autocorrelations of the received signal. The phase distribution has been analyzed, and an iterative mechanism has been employed to improve the accuracy of carrier frequency estimation. Simulations show that the algorithm works well for amplitude-shift keying (ASK), phase-shift keying (PSK), and quadrature amplitude modulation (QAM) signals.

Original languageEnglish (US)
Pages48-54
Number of pages7
StatePublished - Dec 1 2004
EventOtLCOM 2004 - 2004 IEEE Military Communications Conference - Monterey, CA, United States
Duration: Oct 31 2004Nov 3 2004

Other

OtherOtLCOM 2004 - 2004 IEEE Military Communications Conference
CountryUnited States
CityMonterey, CA
Period10/31/0411/3/04

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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