Nano Communication Networks最新文献

As the process of scaling down continues at a rapid pace, there is a growing need for an alternative semiconductor device to replace CMOS. One of the alternatives that attracted a lot of attention is called nanomagnetic logic (NML). This is because NML delivers a high device density in addition to a non-volatility of stored information, beyond-CMOS technologies, and device work at room temperature. It is necessary to lower the circuit density and increase the speed of circuits like adders. Using emerging NML logic, we created a full-adder, and ripple carry adder (RCA) with a minimum area. As a result, the invented multilayer-based decimal design makes use of RCA, and full-adder, for innovative 3D topology. We used an NML framework built with perpendicular nanomagnetic (pNML) layers to simulate the characteristics of these devices. With the adder designs that have been offered the latency values are relatively low while performing exhaustive testing. Using pNML technology, a decimal adder has been constructed for the first time in the literature. In addition, simulations are carried out with the help of the Modelsim simulator. During the process of nanomagnetic designing consideration is given to both of these aspects as latency and area. To create an NML circuit, the tool MagCAD is employed. Results are better using the pNML environment-based full adder, RCA and decimal adder.

The manuscript represents miniaturized two-radiating element-based MIMO antennas for the frequency span of 1 THz to 20 THz. Five MIMO antenna structures are designed and analysed by modifying the shape of radiating elements and ground regions to attain better performance. The proposed structures’ performance is compared in terms of return loss, isolation, total gain, directivity, radiation pattern, directivity, peak gain, ECC, TARC, CCL, and TARC. The presented design provides the minimum return loss of −50.85 dB, maximum isolation of 38 dB, maximum bandwidth (S₁₁$<$ −10 dB) of 6.99 THz, maximum normalized directivity of 75°, and peak directivity of 4.635 dB. In addition, the other MIMO performance characteristics, such as the Diversity Gain (DG), Envelop Correlation Coefficient (ECC), Channel Capacity Loss (CCL), and Total Active Reflection Coefficient (TARC) are all within acceptable range. Finally, the presented design is compared with other relevant designs, and a good performance is observed. The proposed structure provides the solution for a superlative MIMO antenna with ultra-wideband, high gain, and compact structure. The proposed design is used for the B5G, THz wave radar, vehicular communications, astronomical radiometric applications imaging, health care, sensing, screening for weapons, explosives, and biohazards identification.

Molecular Communication (MC) is a bio-inspired communication modality that utilizes chemical signals in the form of molecules to exchange information between spatially separated entities. Pulse shaping is an important process in all communication systems, as it modifies the waveform of transmitted signals to match the characteristics of the communication channel for reliable and high-speed information transfer. In MC systems, the unconventional architectures of components, such as transmitters and receivers, and the complex, nonlinear, and time-varying nature of MC channels make pulse shaping even more important. While several pulse shaping methods have been theoretically proposed for MC, their practicality and performance are still uncertain. Moreover, the majority of recently proposed experimental MC testbeds that rely on microfluidics technology lack the incorporation of programmable pulse shaping methods, which hinders the accurate evaluation of MC techniques in practical settings. To address the challenges associated with pulse shaping in microfluidic MC systems, we provide a comprehensive overview of practical microfluidic chemical waveform generation techniques that have been experimentally validated and whose architectures can inform the design of pulse shaping methods for microfluidic MC systems and testbeds. These techniques include those based on hydrodynamic and acoustofluidic force fields, as well as electrochemical reactions. We also discuss the fundamental working mechanisms and system architectures of these techniques, and compare their performances in terms of spatiotemporal resolution, selectivity, system complexity, and other performance metrics relevant to MC applications, as well as their feasibility for practical MC applications.

The conventional complementary metal oxide semiconductor (CMOS) technology faces scalability and secondary effects issues in deep nanoscale regime. Therefore, many possible technologies are being explored to boost the current electronic industry. Quantum-dot cellular automata (QCA) is the possible technology to overcome the issues of conventional CMOS technology. QCA technology gives the advantages of area-efficient, low-power, and high-speed logic implementation in deep nanoscale regime. Exclusive-OR (XOR) gate is the fundamental logic required for different applications. Therefore, a reliable 3-input XOR gate using QCA technology is proposed in the paper. In communication system, the XOR gate can be utilized for the generation of parity bits. Hence, the proposed XOR gate is applied to develop the 2, 3, 4, and 5-input even and odd parity generators. The developed designs are more efficient in comparison with the existing designs. Any input parity generator can easily be developed using the proposed XOR gate. The number of cells, cell area, layout area, and design cost are improved for the proposed 3-input XOR gate as compared to the existing designs. The proposed 4-input parity generator consists of only 16 QCA cells and improves 76% design cost as compared to the best-reported work in the literature. Energy dissipation analysis is also presented for the proposed designs using the QCA Designer-E and QCA Pro. The proposed 4-input parity generator reduces 87.97% of total energy dissipation at a 1.5 Kink energy level as compared to the existing work.

Wireless NanoSensor Network (WNSN) is a brand-new type of sensor network with broad application prospects. In view of the limited energy of nano-nodes and unstable links in WNSNs, we propose an energy balance cluster network framework (EBCNF) based on Simultaneous Wireless Information and Power Transfer (SWIPT). The EBCNF framework extends the network lifetime of nano-nodes and uses a clustering algorithm called EBACC (an energy balance algorithm for intra-cluster and inter-cluster nodes) to make the energy consumption of nodes more uniform. Simulation shows that the EBCNF framework can make the network energy consumption more uniform, reduce the error rate of data transmission and the average network throughput, and can be used as an effective routing framework for WNSNs.

Quantum-dot Cellular Automata (QCA) is a technology that has the potential to create nano communication systems that are both highly efficient in power consumption and compact in size When compared to CMOS enabled electronic devices, QCA can achieve faster operation speed, higher density and lower power dissipation which becomes a boon, in digital logic design. In this paper, proposed work of designing sequential circuits using QCA has been achieved. An efficient JK flip-flop design along with 2-bit, 3-bit, 4-bit and 8-bit shift registers which can be further scaled up to N-bits using the same proposed design of flip-flop is observed. Also, the fault tolerance of proposed JK flip-flop design against single cell addition and deletion defects are presented in this paper. After conducting a performance comparison and thorough analysis of energy dissipation, it has been determined that the proposed designs bear lower cost and lower energy dissipations. Using QCADesigner tool, the validation of functions and processes of all proposed sequential designs has been done accordingly.

The QCA technology is a strong contender for replacing CMOS technology in the design of nanoscale digital circuits. The goal of this paper’s design is to increase the performance of the multiplexer (MUX) circuit. The design strategy is using a cost-effective architecture and path-planning design, which can reduce design costs. This paper presents an efficient circuit for 2-to-1 QCA MUX. Then, two circuits including 4-to-1 and 8-to-1 QCA MUX circuits are developed using this 2-to-1 QCA MUX circuit. The functionality of these circuits is investigated using QCADesigner tool version 2.0.3. The designed 2-to-1 QCA MUX circuit has 0.5 clock cycles delay, $0.01\mu m$² area and 15 cells. Moreover, the suggested 4-to-1 (8-to-1) QCA MUX circuit has 53 (163) cells, 0.06 (0.18) $\mu$m² area and 1 (3.75) clock cycles delay. The energy dissipation (Area-delay cost) of the proposed 2-to-1, 4-to-1, and 8-to-1 MUX at 1${}^o$K is 8.91 mev (0.04), 17.9 mev (0.96), and 39.3 mev (8.82), respectively. The comparison results demonstrate that the designed circuits provide benefits compared to other MUX circuits.

In this paper, we present a joint localization and channel parameter estimation method in the presence of signal-dependent noise and inter-symbol interference for diffusive molecular communication systems. The joint parameter estimation of the nanomachine can provide reliable communication in a generic diffusive molecular communication system. In particular, an iterative maximum likelihood estimation (MLE) approach for jointly estimating locations, flow velocity, and diffusion coefficient is carried out. The Cramer–Rao lower bound on the variance of channel parameters and location is derived. The normalized estimation error is marginally higher for unknown parameters case than that of some known parameters. The individual result (location estimation or channel parameters estimation) outperforms the existing methods.