Optical wireless (OW) communications, besides being of great interest for indoor and outdoor applications, have been recently proposed as a powerful alternative to the existing wired and wireless radio frequency (RF) interconnects in a network-on-chip (NoC). Design and analysis of networks with OW links require a careful investigation of cross-link interference, which impacts considerably the efficiency of systems that reuse the same channel for multiple transmissions. Yet, there is no comprehensive analysis of interference for OW NoCs, and the analyses of crosstalk in optical waveguide communications usually rely on synchronous data transmissions. A novel framework for the analysis of on-chip OW communications in the presence of cross-link cochannel interference and noise is proposed, where asynchronous data transmissions are considered. Self-beating of interfering signals is also considered, which was often neglected in previous literature. The bit error probability (BEP) for arbitrary number of interfering sources is derived as a function of signal-to-noise ratio (SNR), interference powers, detection threshold and pulse shaping, using both exact and approximation methods. The proposed analysis can be applied to both noise- and interference-limited cases, and enables a system designer to evaluate reuse distance between links that share the same optical carrier for simultaneous communication in NoCs.

中文翻译：

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片上网络 (NoC) 场景中光无线通信的干扰分析

光无线 (OW) 通信除了对室内和室外应用非常感兴趣之外，最近还被提议作为片上网络 (NoC) 中现有有线和无线射频 (RF) 互连的强大替代方案。设计和分析具有 OW 链路的网络需要仔细调查交叉链路干扰，这会显着影响重复使用同一信道进行多次传输的系统的效率。然而，目前还没有对OW NoCs的干扰进行全面分析，光波导通信中的串扰分析通常依赖于同步数据传输。提出了一种在存在交叉链路同信道干扰和噪声的情况下分析片上 OW 通信的新框架，其中考虑了异步数据传输。还考虑了干扰信号的自跳动，这在以前的文献中经常被忽略。任意数量干扰源的误码率 (BEP) 是作为信噪比 (SNR)、干扰功率、检测阈值和脉冲整形的函数，使用精确和近似方法导出的。所提出的分析可应用于噪声和干扰受限的情况，并使系统设计人员能够评估共享同一光载波以在 NoC 中同时通信的链路之间的重用距离。检测阈值和脉冲整形，使用精确和近似方法。所提出的分析可应用于噪声和干扰受限的情况，并使系统设计人员能够评估共享同一光载波以在 NoC 中同时通信的链路之间的重用距离。检测阈值和脉冲整形，使用精确和近似方法。所提出的分析可应用于噪声和干扰受限的情况，并使系统设计人员能够评估共享同一光载波以在 NoC 中同时通信的链路之间的重用距离。