An LPC-based fronthaul compression scheme

Leonardo Ramalho, Maria Nilma Fonseca, Aldebaro Klautau, Chenguang Lu, Miguel Berg, Elmar Trojer, Stefan Höst

Research output: Contribution to journalArticlepeer-review

Abstract

Several new architectures are under investigation for cloud radio access networks, assuming distinct splits of functionality among the network elements. Consequently, the research on radio data compression for the fronthaul is based on assumptions that correspond to a wide variety of tradeoffs among data rate, signal distortion, latency, and computational cost. This letter describes a method for LTE downlink point-topoint signal compression based on linear prediction and Huffman coding, which is suitable for low cost encoding and decoding units with stringent restrictions on power consumption. The proposed method can work at various compression factors, such as 3.3:1 at an average EVM of 0.9%, or 4:1 at an average EVM of 2.1%.

Original languageEnglish
Article number7731140
Pages (from-to)318-321
Number of pages4
JournalIEEE Communications Letters
Volume21
Issue number2
DOIs
Publication statusPublished - 2017 Feb 1

Subject classification (UKÄ)

  • Communication Systems

Free keywords

  • C-RAN
  • Fronthaul
  • LPC
  • LTE signal compression

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