Random Access Protocols With Collision Resolution in a Noncoherent Setting
Random Access Protocols With Collision Resolution in a Noncoherent Setting
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DOI：
10.1109/lwc.2015.2433265
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发表时间：
2014-09
影响因子：
6.3
通讯作者：
Zoran Utkovski;T. Eftimov;P. Popovski
中科院分区：
文献类型：
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作者：
Zoran Utkovski;T. Eftimov;P. Popovski
无线系统越来越多地用于机器类型通信(MTC)，其中用户零星地发送非常短的消息。在这样的设置中，由信道估计施加的开销是相当大的，因此需要非相干通信。在这封信中，我们考虑一种非相干设置，在该设置中，用户随机访问媒体以向公共接收者发送非常短的消息。我们提出了一种基于Gabor帧的传输方案，每个用户有一个由M个可能的码字组成的专用码本，同时码本作为用户的ID。该方案被用作解决冲突的简单协议的基础。
Wireless systems are increasingly used for machine-type communication (MTC), where the users sporadically send very short messages. In such a setting, the overhead imposed by channel estimation is substantial, thereby demanding noncoherent communication. In this letter, we consider a noncoherent setup in which users randomly access the medium to send very short messages to a common receiver. We propose a transmission scheme based on Gabor frames, where each user has a dedicated codebook of M possible codewords, while the codebook simultaneously serves as an ID for the user. The scheme is used as a basis for a simple protocol for collision resolution.