Orthogonal precoding is a promising, linear technique in which the null space of a precoding matrix with orthonormal columns is designed to suppress the sidelobes.  However, orthogonal precoders suffer from high arithmetic complexity which has limited their application.  UQ research has established that the arithmetic complexity can be made linear instead of quadratic if a block reflector or generalised Householder transformation is used to perform the orthogonal precoding instead of the otherwise unstructured unitary transformation.

Key features

  • relevant to wide range of digital communications, including 5G and 6G
  • potential 20% spectral efficiency increase compared to industry-standard 5G approaches
  • compatible with MIMO approaches.


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