Low-complexity decoding for RaptorQ codes using a recursive matrix inversion formula

Yi Pin Lu, I. Wei Lai, Chia Han Lee, Tzi Dar Chiueh

研究成果: 雜誌貢獻期刊論文同行評審

6 引文 斯高帕斯(Scopus)

摘要

In this letter, we propose a low-complexity recursive decoding algorithm for rateless RaptorQ codes, the next generation error correction codes adopted by several standards such as DVB-H. Conventionally, the decoding of RaptorQ codes requires inverting a huge receive code generator matrix (RCGM). Instead of such costly matrix inversion, we propose to calculate the inverse of the transmit code generator matrix (TCGM) beforehand. Then, based on this pre-calculated inverse, the Sherman-Morrison formula is applied to recursively compute the inverse of the RCGM at run time. Most computations are thus shifted offline. Moreover, this recursive decoding distributes the computations among different time slots, thereby significantly shortening the decoding latency and improving the hardware utilization. Numerical simulations demonstrate that the computational complexity of the proposed recursive decoding is as low as 6.5% of that required by the conventional method using direct matrix inversion.

原文英語
文章編號6733534
頁(從 - 到)217-220
頁數4
期刊IEEE Wireless Communications Letters
3
發行號2
DOIs
出版狀態已發佈 - 2014 四月
對外發佈

ASJC Scopus subject areas

  • 控制與系統工程
  • 電氣與電子工程

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