arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1508.02495cs.ITmath.IT
收藏

基于扩散的分子通信的无ISI调制

On ISI-free Modulations for Diffusion based Molecular Communication

Hamidreza Arjmandi, Mohammad Movahednasab, Amin Gohari, Mahtab Mirmohseni, Masoumeh Nasiri Kenari, Faramarz Fekri

摘要:

扩散分子通道是具有记忆的通道,因为释放到介质中的分子在随机延迟后撞击受体。通过选择随时间在环境中扩散的分子的类型、强度或释放时间来执行扩散通道上的编码。为了避免符号间干扰(ISI),相同类型的分子应该在足够远的时间点释放。这确保了在相同类型的分子被重新用于信号之前,先前传输的分子在环境中褪色。在本文中,我们考虑ISI自由时隙调制方案。这些调制的最大可靠传输速率由表示允许传输序列的图的约束编码容量给出。然而,实现受限的编码容量需要长的块长度和解码器处的延迟,这对于简单的纳米机器来说是不切实际的。本文的主要贡献是考虑小延迟(短块长度)的调制,并表明它们非常接近约束编码容量。

英文摘要:

A diffusion molecular channel is a channel with memory, as molecules released into the medium hit the receptors after a random delay. Coding over the diffusion channel is performed by choosing the type, intensity, or the released time of molecules diffused in the environment over time. To avoid intersymbol interference (ISI), molecules of the same type should be released at time instances that are sufficiently far apart. This ensures that molecules of a previous transmission are faded in the environment, before molecules of the same type are reused for signaling. In this paper, we consider ISI-free time-slotted modulation schemes. The maximum reliable transmission rate for these modulations is given by the constrained coding capacity of the graph that represents the permissible transmission sequences. However, achieving the constrained coding capacity requires long blocklengths and delays at the decoder, making it impractical for simple nanomachines. The main contribution of this paper is to consider modulations with small delay (short blocklength) and show that they get very close to constrained coding capacity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑