Firstly, the OTFS-IM underwater acoustic communication system is introduced, which introduces index modulation into the Delay–Doppler (DD) domain to make the OTFS system have stronger anti-Delay–Doppler capability. In contrast, since there is index sequence redundancy in a specific index ...
Currently, most of the work on OTFS and OTFS-IM systems is based on two-dimensional modulation, such as quadrature amplitude modulation (QAM). In fact, it is possible to utilize multiple resource symbols jointly to increase the modulation dimension. For example, we can achieve four dimensions ...
这是一一宝贝怀孕的第50天,我现在每天都很紧张也很小心翼翼,季冉宝贝也天天问我一一的情况, 她也很紧张,嘱咐我要照顾好一一,她给一一织了很多的小围脖,都很精致可爱。现在一一的肚子越来越大了,体重也日益上升,本来我还挺开心她可以生好多的小宝宝,但我现在一点也不希望她生小宝宝了,她以前每天都会窝在猫...
Given that the traditional OTFS-IM modulation could be improved and there are resource constraints on the UAV communication, it is critically important to design an optimal and practical OTFS-IM system for A2G communication. To this end, this paper creatively introduces four-dimensional spherical code...
Due to the dispersive characteristics of underwater acoustic channels, this paper proposes an OTFS-IM underwater acoustic communication system based on Hamming distance optimization to reduce the impact of dispersion in underwater acoustic communication. Firstly, the OTFS-IM underwater acoustic ...
Then, the performance gain of the Hamming distance optimization model in the OTFS-IM underwater acoustic communication system under two demodulation algorithms is analyzed, and the performance gain of the Hamming distance optimization model is verified. The channel parameters used in the simulations are...