Diversity Combining via Universal Orthogonal Space-Time Transformations

TL;DR

This paper introduces a universal, channel-independent orthogonal space-time transformation for diversity combining in wireless communication, improving signal robustness against fading.

Contribution

It proposes a novel diversity combining method using a universal orthogonal transformation, extending the concept of orthogonal space-time codes like Alamouti.

Findings

The method is channel independent, simplifying implementation.

It enhances diversity gain in fading environments.

Comparable or improved performance over traditional schemes.

Abstract

Receiver diversity combining methods play a key role in combating the detrimental effects of fadingin wireless communication and other applications. A novel diversity combining method is proposedwhere a universal, i.e., channel independent, orthogonal dimension-reducing space-time transformationis applied prior to quantization of the signals. The scheme may be considered as the counterpart ofAlamouti modulation, and more generally of orthogonal space-time block codes.