The requirements for reliable wireless communication in future 6G systems demand support for increasingly high mobility scenarios. However, such conditions introduce strong channel selectivity in both the time and frequency. This violates a fundamental assumption of conventional OFDM systems, namely that the channel remains approximately invariant within one symbol. As a result, the complexity of the channel representation in the time-frequency domain increases significantly, thereby limiting the effectiveness of traditional channel estimation and equalization techniques.

An alternative representation in the delay-Doppler domain offers a promising perspective. In this domain, even highly dynamic channels exhibit a comparatively simple and structured behavior. This makes delay-Doppler-based approaches particularly attractive for high-mobility applications such as satellite communications, aviation, and high-speed rail systems.

In this project, equalization techniques in the delay-Doppler domain are investigated and evaluated with respect to their potential performance gains. The implementation is deliberately based on precoded OFDM in order to ensure practical relevance and compatibility with existing OFDM-based communication systems.