Software-defined radio equipped with rapid modulation recognition

Jefferson L. Xu, Wei Su, Mengchu Zhou

Research output: Contribution to journalArticlepeer-review

102 Scopus citations


Automatic modulation recognition (AMR)-based software-defined radio (SDR) is a research challenge in developing third-generation (3G) and fourth-generation (4G) wireless communications with adaptive modulation capability. However, the existing AMR technology does not satisfy the seamless demodulation requirement of the SDR. A novel design of the AMR method with reduced computational complexity and fast processing speed is needed. This paper describes a discrete likelihood-ratio test (DLRT)-based rapid-estimation approach to identifying the modulation schemes blindly for uninterrupted data demodulation in real time. The statistical performance of the fast AMR associated with its implementation using the SDR is presented.

Original languageEnglish (US)
Article number5404400
Pages (from-to)1659-1667
Number of pages9
JournalIEEE Transactions on Vehicular Technology
Issue number4
StatePublished - May 2010

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Applied Mathematics


  • Adaptive modulation
  • Cognitive radio (CR)
  • Maximum-likelihood ratio test
  • Modulation classification
  • Modulation recognition
  • Parameter estimation
  • Software-defined radio (SDR)


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