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首页> 外文期刊>Nanotechnology, IEEE Transactions on >A Communication Theoretical Modeling of Single-Walled Carbon Nanotube Optical Nanoreceivers and Broadcast Power Allocation
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A Communication Theoretical Modeling of Single-Walled Carbon Nanotube Optical Nanoreceivers and Broadcast Power Allocation

机译：单壁碳纳米管光学纳米接收器的通信理论建模与广播功率分配

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摘要

Carbon nanotube (CNT) with its ground-breaking properties is a promising candidate for future nanoscale communication networks. CNTs can be used as on-chip optical antenna for wireless interconnects. Carbon nanotube field-effect transistors (CNTFETs) show significant performance as photodetectors due to wide spectral region and tunable bandgap. In this paper, CNTFETs composed of semiconducting single-walled carbon nanotube (SWNT) and metal contacts (M-SWNT-M) are used as photodiode receivers in nanoscale optical communication by theoretically modeling diameter-dependent characteristics for shot-, dark-, and thermal-noise-limited cases. Bit error rate (BER), cutoff bit rate, and signal-to-noise ratio performance are analyzed for intensity modulation and direct detection modulation. The multireceiver CNT nanoscale network topology is presented for information broadcast and the minimum SNR is maximized solving NP-hard max–min power allocation problem with semidefinite programming relaxation and branch and bound framework. The significant performance improvement is observed compared with uniform power allocation. Derived model is compared with existing experiments and hundreds of Mb/s data rate is achievable with very low BERs. Furthermore, optimization gain is highest for thermal-noise-limited case while the shot-noise-limited case gives the highest data rate.
机译：具有开创性的碳纳米管（CNT）是未来纳米级通信网络的有希望的候选者。 CNT可用作无线互连的片上光学天线。碳纳米管场效应晶体管（CNTFET）由于具有宽的光谱范围和可调节的带隙，因此具有作为光电探测器的显着性能。在本文中，通过从理论上建模散发，暗和发射的直径相关特性，将由半导体单壁碳纳米管（SWNT）和金属触点（M-SWNT-M）组成的CNTFET用作纳米级光通信中的光电二极管接收器。热噪声受限的情况。针对强度调制和直接检测调制，分析了误码率（BER），截止比特率和信噪比性能。提出了用于信息广播的多接收器CNT纳米级网络拓扑结构，并通过半定程序松弛和分支定界框架来解决NP-hard max-min功率分配问题，从而使最小SNR最大化。与统一的功率分配相比，观察到了显着的性能改进。将推导的模型与现有实验进行比较，可以在非常低的BER情况下达到数百Mb / s的数据速率。此外，对于热噪声受限的情况，优化增益最高，而散粒噪声受限的情况则提供最高数据速率。

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