Mitigating Bit-Synchronization Errors in Huffman-Coding-Aided Index Modulation

Ye Liu*, Justin P. Coon

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


When utilizing all subcarrier activation patterns in the combinatorial index modulation (IM) scheme, existing techniques either fail to realize the maximum possible throughput enhancement or fail to address the bit-level synchronization issue (or error propagation) due to the variable-length nature of the index-domain codebook. To address these drawbacks, we propose using Huffman coding for IM together with two constellation mappings for the bandpass modulation. The proposed scheme induces no signal overhead and is applicable when the index-domain codebook has the maximum encoding rate. Simulations demonstrate the effectiveness of the proposed scheme in mitigating bit-level synchronization errors.

Original languageEnglish
Article number8588988
Pages (from-to)426-429
Number of pages4
JournalIEEE Communications Letters
Issue number3
Publication statusPublished - Mar 2019
Externally publishedYes


  • Huffman coding
  • Index modulation
  • error propagation
  • synchronization error

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