Full-Diversity Space-Time Error Correcting Codes with Low-Complexity Receivers

Mohamadsayed Hassan,Karine Amis

doi:10.1155/2011/653506

Abstract

We propose an explicit construction of full-diversity space-time block codes, under the constraint of an error correction capability. Furthermore, these codes are constructed in order to be suitable for a serial concatenation with an outer linear forward error correcting (FEC) code. We apply the binary rank criterion, and we use the threaded layering technique and an inner linear FEC code to define a space-time error-correcting code. When serially concatenated with an outer linear FEC code, a product code can be built at the receiver, and adapted iterative receiver structures can be applied. An optimized hybrid structure mixing MMSE turbo equalization and turbo product code decoding is proposed. It yields reduced complexity and enhanced performance compared to previous existing structures.

Highlights

Space-time block (STB) code designs have recently attracted considerable attention, since they improve the reliability of communication systems over fading channels
In [17], we proposed for the concatenated space-time error correcting codes (STECCs) an iterative receiver structure composed by a maximum a posteriori (MAP) symbol detector over one symbol duration, which takes a priori soft information from the soft input soft output (SISO) turbo product code decoder
We have presented the construction of spacetime codes with error correction capability and we have optimized the receiver in case of serial concatenation with an outer forward error correcting (FEC) code

Summary

Introduction

Space-time block (STB) code designs have recently attracted considerable attention, since they improve the reliability of communication systems over fading channels. Since the generalized rank criterion implies that the error correcting code must be defined over a finite field where its dimension depends on the modulation order, the construction of full diversity STECCs for higher-order modulations cannot be realized in practice using this approach. In [13], an unified construction of STECCs achieving the optimal rate-diversity tradeoff [15] from binary error correcting codes for different types and orders of modulation has been presented.

System Model

Full-Diversity STECCs

Receiver Structures

Reconstruction of a Product Code from a Concatenated

Simulation Results

Conclusion