Efficient MIMO-OFDM Schemes for Future Terrestrial Digital TV with Unequal Received Powers

TL;DR

This paper compares the performance of various MIMO-OFDM schemes for terrestrial digital TV under conditions of equal and unequal received powers, highlighting the robustness and efficiency of different codes depending on the scenario.

Contribution

It provides a comparative analysis of non-orthogonal MIMO-OFDM schemes, including Golden code and Alamouti, under realistic power imbalance conditions for digital TV.

Findings

Golden code outperforms others with two antennas at high spectral efficiency.

Alamouti scheme is best for low spectral efficiency or severe damage.

Golden code shows highest robustness with three antennas under power unbalance.

Abstract

This article investigates the effect of equal and unequal received powers on the performances of different MIMO-OFDM schemes for terrestrial digital TV. More precisely, we focus on three types of non-orthogonal schemes: the BLAST scheme, the Linear Dispersion (LD) code and the Golden code, and we compare their performances to that of Alamouti scheme. Using two receiving antennas, we show that for moderate attenuation on the second antenna and high spectral efficiency, Golden code outperforms other schemes. However, Alamouti scheme presents the best performance for low spectral efficiency and equal received powers or when one antenna is dramatically damaged. When three antennas are used, we show that Golden code offers the highest robustness to power unbalance at the receiving side