Two Quasi Orthogonal Space-Time Block Codes with Better Performance and Low Complexity Decoder

TL;DR

This paper introduces two new quasi orthogonal space-time block codes for MISO systems that improve performance and enable low complexity decoding with fewer antennas, outperforming existing methods.

Contribution

The paper proposes two novel quasi orthogonal STBCs for 3-4 transmit antennas with a low complexity decoder and demonstrates their superior performance through simulations.

Findings

Proposed codes decode half of the symbols independently.

Simulation results show better performance than existing approaches.

Codes are suitable for systems with 3 or 4 transmit antennas.

Abstract

This paper presents two new space time block codes (STBCs) with quasi orthogonal structure for an open loop multi-input single-output (MISO) systems. These two codes have been designed to transmit from three or four antennas at the transmitter and be given to one antenna at the receiver. First, the proposed codes are introduced and their structures are investigated. This is followed by the demonstration of how the decoder decodes half of transmitted symbols independent of the other half. The last part of this paper discusses the simulation results, makes performance comparison against other popular approaches and concludes that the proposed solutions offer superiority.