June 09, 2017

Semi-analytical evaluation of concatenated RS/LDPC coding performance with finite block interleaving

  • Adriaan Suls
  • Guenach M.
  • Julie N.
  • Lefevre Y.
  • Marc M.

The Monte Carlo (MC) simulation of the error performance of a concatenated coding system with finite interleaving depth between the outer and inner codes is time-consuming, especially when targeting low error rates and examining several interleaver settings. In this contribution we present a semianalytical evaluation of the word error rate (WER) performance of a system with Reed-Solomon (RS) outer coding, finite block interleaving, low-density parity check (LDPC) inner coding and mapping to a symbol constellation. The proposed evaluation method relies on a simple single-parameter statistical mixture model for the number of byte errors in the LDPC codeword after the inner decoding. Only the WER and byte error rate (ByteER) of the inner subsystem, determined by the LDPC code and the considered constellation, are required to compute the error performance corresponding to different parameters of the RS code and the interleaver. We show that the semi-analytical WER of the concatenated system closely matches the WER resulting from MC simulations, for both the AWGN channel and the Rayleigh block-fading channel.

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Recent Publications

June 19, 2017


  • Cammerer S.
  • Hoydis J.
  • Leible B.
  • Stahl M.
  • Ten Brink S.

The decoding performance of polar codes strongly depends on the decoding algorithm used, while also the decoder throughput and its latency mainly depend on the decoding algorithm. In this work, we implement the powerful successive cancellation list (SCL) decoder on a GPU and identify the bottlenecks of this algorithm with ...

June 04, 2017

A New PRACH Transmission Scheme in Unlicensed Spectrum

  • Luo Z.
  • Meng Y.
  • Tao T.

For the unlicensed spectrum, the occupied bandwidth requirement is demanded by some regulations. The legacy scheme of Physical Random Access Channel (PRACH) for Long Term Evolution (LTE) cannot satisfy it. In this paper, we propose a novel PRACH transmission scheme to satisfy the requirement of unlicensed spectrum based on preamble ...

June 01, 2017

Mutual service processes in Euclidean spaces: existence and ergodicity

  • Baccelli F.
  • Mathieu F.
  • Norros I.

Consider a set of objects, abstracted to points of a spatially stationary point process in R-d, that deliver to each other a service at a rate depending on their distance. Assume that the points arrive as a Poisson process and leave when their service requirements have been fulfilled. We show ...