On the Design of Interleavers for BICM Transmission
Paper in proceedings, 2008

In this paper we design interleavers for bit-interleaved coded modulation (BICM) based on popular convolutional codes and quadrature amplitude modulation with Gray mapping. We analyze the so-called modular interleavers where the outputs of the convolutional encoder are appropriately matched with the input bits of the modulator. To quantify the achievable improvements we develop bounds on the coded BER using the multidimensional weight distribution spectrum of a code together with an equivalent QAM channel model. Based on these bounds, we show that the assignment of the encoder's output to the bit positions in the symbol significantly affects the system performance. The analytical developments are contrasted with numerical simulations. The improvements obtained through the proposed approach do not change the receiver's complexity and, depending on the system's parameters (rate, modulation, code's memory), they may be up to 1.7 dB!

Author

Alex Alvarado

Chalmers, Signals and Systems, Communication and Antenna Systems, Communication Systems

Leszek Szczecinski

INRS-Energy, Materials and Telecommunications

Erik Agrell

Chalmers, Signals and Systems, Communication and Antenna Systems, Communication Systems

Arne Svensson

Chalmers, Signals and Systems, Communication and Antenna Systems, Communication Systems

Proceedings European Wireless Conference 2008, EW2008, Prague, Czech Republic

4623839

Subject Categories

Telecommunications

DOI

10.1109/EW.2008.4623839

ISBN

9783800731022

More information

Latest update

3/29/2018