Power-Balanced Orthogonal Space-Time Block Code

TL;DR

This paper introduces new systematic methods for constructing power-balanced orthogonal space-time block codes using amicable orthogonal designs, improving power distribution and practical attributes of the codes.

Contribution

It presents two novel construction techniques for amicable orthogonal designs and demonstrates their effectiveness in creating improved power-balanced O-STBCs.

Findings

One O-STBC achieves optimal power distribution.

Construction methods generalize existing approaches.

Design guidelines improve code power balance.

Abstract

In this paper, we propose two new systematic ways to construct amicable orthogonal designs (AOD), with an aim to facilitate the construction of power-balanced orthogonal spacetime block codes (O-STBC) with favorable practical attributes. We also show that an AOD can be constructed from an Amicable Family (AF), and such a construction is crucial for achieving a power-balanced O-STBC. In addition, we develop design guidelines on how to select the "type" parameter of an AOD so that the resultant O-STBC will have better power-distribution and code-coefficient attributes. Among the new O-STBCs obtained, one is shown to be optimal in terms of power distribution attributes. In addition, one of the proposed construction methods is shown to generalize some other construction methods proposed in the literature.