The field of wireless communications is witnessing significant developments in channel estimation and multiplexing techniques. Researchers are exploring novel methods to improve the accuracy and efficiency of channel estimation, particularly in scenarios where training data is limited. One notable direction is the use of infinite width convolutional networks, which has shown promise in estimating channels without requiring large amounts of training data. Additionally, new multicarrier schemes such as orthogonal delay-Doppler division multiplexing (ODDM) are being investigated to address the challenges of waveform design in linear time-varying channels. Phase synchronization techniques are also being developed to support distributed antenna systems. Noteworthy papers in this area include:

• The paper on Channel Estimation by Infinite Width Convolutional Networks, which proposes a promising solution for channel estimation that does not require a large training set.
• The paper on Breaking the TDD Flow for Over-the-Air Phase Synchronization in Distributed Antenna Systems, which presents a feasibility study on implementing phase synchronization and analyzes its impact on the quality of service.