Short-packet Communications Research Articles

On the Performance of Uplink NOMA Short-Packet Communication System

On the Performance of Uplink NOMA Short-Packet Communication System

Achieving Secure and Fresh Information Updates via Short-Packet Communications

Achieving Secure and Fresh Information Updates via Short-Packet Communications

Secure short-packet communications in power beacon-assisted IoT networks over Nakagami-m fading channels

In this work, we investigate short-packet communications in power beacon (PB)-assisted Internet-of-Things (IoT) networks, where an energy-constrained actuator first harvests energy from a dedicated PB, and then transmits confidential signals to a desired controller in the presence of an eavesdropper. We derive a closed-form lower bound approximation expression for the average achievable effective secrecy rate (AESR) over Nakagami-m fading channels. To gain more insights, we also present the asymptotic average AESR in the high signal-to-noise ratio (SNR) regime. Specifically, analytical results indicate that an average AESR floor appears with the increase of SNR. Moreover, a low complexity one-dimensional search method is employed to maximize the average AESR by optimizing the energy harvesting length. Monte-Carlo simulations are provided to corroborate our analysis.

Non-coherent short-packet communications: Novel z-domain user multiplexing

In the evolution of fifth generation (5G) and beyond wireless communication systems, non-coherent (NC) short packet communication (SPC) is crucial for achieving ultra-reliable low-latency communication (URLLC). Frame design, latency, and reliability are some of the challenges associated with short-packet communication. Recently, to address these challenges, a novel modulation scheme known as modulation on conjugate-reciprocal zeros (MOCZ) has been proposed. MOCZ modulates information on conjugate reciprocal zeros in the z-domain, thereby eliminating the need for channel estimation and providing a robust solution for NC communication. However, in multi-user MOCZ (MU-MOCZ) scheme, adding guard intervals to each short packet to mitigate channel impact remains an issue, as it increases the transmission time and consequently reduces efficiency. To address the aforementioned problem, this paper introduces a novel frame design approach called z-domain user multiplexing MOCZ (ZDUM-MOCZ or ZDM-MOCZ). Unlike traditional time division multiplexing (TDM), which serves users consecutively in the time domain, this method multiplexes users in the z-domain. In this approach, each user is allocated a specific set of zeros in the z-domain, which collectively form a unique sequence in the time domain. The findings illustrate the potential for reduced latency in downlink transmission, highlighting the benefits of this novel methodology over conventional MU-MOCZ method. The proposed ZDUM-MOCZ scheme not only addresses the existing issues in the frame design of the MU-MOCZ scheme but also facilitates more efficient and reliable short packet communication in 5G and beyond wireless systems.

Design and Detection of Unitary Constellations in Non-Coherent SIMO Systems for Short Packet Communications

Design and Detection of Unitary Constellations in Non-Coherent SIMO Systems for Short Packet Communications

Analysis of symbiotic backscatter empowered wireless sensors network with short-packet communications.

Recent progress studies in light of wireless communication systems mainly centred around two focuses: zero-energy consumption and ultra-reliable and low-latency communication (URLLC). Among various cutting-edge areas, exploiting ambient backscatter communication (Backcom) has recently been devised as one of the foremost solutions for achieving zero energy consumption through the viability of ambient radio frequency. Meanwhile, using short-packet communication (SPC) is the cheapest way to reach the goal of URLLCs. Upon these benefits, we investigate the feasibility of Backcom and SPC for symbiotic wireless sensor networks by analyzing the system performance. Specifically, we provide a highly approximated mathematical framework for evaluating the block-error rate (BLER) performance, followed by some useful asymptotic results. These results provide insights into the level of diversity and coding gain, as well as how packet design impacts BLER performance. Numerical results confirm the efficacy of the developed framework and the correctness of key insights gleaned from the asymptotic analyses.

Energy Efficient Resource Allocation for Wireless Powered Short Packet Communication Networks

Energy Efficient Resource Allocation for Wireless Powered Short Packet Communication Networks

Secure beamforming design for MISO URLLC networks in IoT applications

This paper investigates joint beamforming and artificial noise (AN) design for secure multiple-input single-output (MISO) ultra-reliable and low latency communication (URLLC) networks in Internet of Things (IoT) applications. In considered system, a base station (BS) transmits confidential information for individual IoT users using the short-packet communication technique under the wiretap of eavesdroppers. To enhance physical layer security, the BS injects additional dedicated AN symbols to degrade the information retrieval ability at eavesdroppers. In this paper, we aim to joint design the transmit beamforming and AN symbol to maximize the minimum URLLC secrecy rate of IoT user subject to the power budget of the BS. The optimization design problem is highly nonconvex due to coupled variables in the URLLC secrecy rate and channel dispersion expressions, and thus it is mathematically challenging to solve this problem directly. To overcome this issue, we first introduce various convex inner approximations to convexify the nonconvex terms, and then we develop an efficient iterative algorithm based on the sequential convex programming approach. Extensive numerical simulation results are conducted to investigate the URLLC secrecy rate region. In conclusion, the two new URLLC parameters, i.e., the transmit packet blocklength and block error probability, will cause the considerable degradation on the URLLC secrecy rate region when comparing to that of the traditional beamforming design based on the Shannon capacity.

Freshness-in-air: An AoI-inspired UAV-assisted wireless sensor networks

The Age-of-Information (AoI) metric has emerged as a performance measurement metric for evaluating time-sensitive wireless communications systems. Maintaining the freshness and reliability of data is critical in time-critical wireless networks, where outdated information can have significant consequences. Moreover, short packet transmissions are used in wireless sensor networks (WSNs) to maintain energy efficiency and low latency. This paper proposes a theoretical model that utilizes the AoI metric and finite block length information theory to estimate information freshness in an unmanned aerial vehicle (UAV)-assisted WSN. This network includes multiple sensing nodes and relies on short-packet communication for transmission. In this paper, closed-form expressions for average AoI (AAoI) and the block error rate are derived. Furthermore, the optimal altitude and block length that ensures the freshness of received information at the destination is determined. The results of the analysis provide valuable insights into the performance characteristics of UAV-assisted WSNs and have important implications for the design and optimization of such systems.

Secure Short-Packet Communications via UAV-Enabled Mobile Relaying: Joint Resource Optimization and 3D Trajectory Design

Secure Short-Packet Communications via UAV-Enabled Mobile Relaying: Joint Resource Optimization and 3D Trajectory Design

Short-packet communications in wireless energy transfer full-duplex IoT networks with deep learning design

Short-packet communications in wireless energy transfer full-duplex IoT networks with deep learning design

Partitioned Analog Fountain Codes for Short Packet Communications

Partitioned Analog Fountain Codes for Short Packet Communications

Analysis of Multiantenna UAV-Aided NOMA Relay Systems for Short-Packet Communications between Multiuser Pairs

Analysis of Multiantenna UAV-Aided NOMA Relay Systems for Short-Packet Communications between Multiuser Pairs

Covert and Reliable Short-Packet Communications Over Fading Channels Against a Proactive Warder: Analysis and Optimization

Covert and Reliable Short-Packet Communications Over Fading Channels Against a Proactive Warder: Analysis and Optimization

A Direct-Digital 40 μA 100 kb/s Intracardiac Communication Receiver with 250 μs Startup Time for Low Duty-Cycle Leadless Pacemaker Synchronization.

The first commercial dual-chamber leadless pacemaker (LLPM) was introduced recently. The system combines two separate implants situated in the right atrium and the right ventricle of the heart. Implant synchronization is accomplished with conductive intracardiac communication (CIC) using the myocardium and blood as transmission channel. Successful implant synchronization of this dual-chamber LLPM has been demonstrated. However, the continuously active synchronization transceivers, consuming about 800 nA, cause a 25-45% reduction in the projected device longevity. This work proposes an alternative strategy for power-optimized LLPM synchronization, which is based on synchronous duty-cycling of the transceivers and direct-digital CIC (DD-CIC). In line with this strategy, a novel low-power DD-CIC receiver for short-packet communication based on Manchester-encoded data and with fast startup time is presented. The circuit was fabricated in 180 nm CMOS technology and analyzed with respect to sensitivity, current consumption and startup time under highly duty-cycled operation. The receiver achieves a sensitivity of 81.6±7.4 μV at a data rate of 100 kb/s, with an active current consumption of 39.1±0.6 μA and a startup time below 250 μs. Operating the receiver as specified by the proposed LLPM synchronization strategy reduces the current consumption to a measured average value of 73 nA. In conclusion, this work suggests synchronous duty-cycling for CIC-based implant synchronization as a promising concept to severely reduce the current consumption of contemporary dual-chamber LLPMs. Consequently, device longevity may be increased significantly, potentially reducing the frequency of costly and complication-prone re-interventions.

Fundamental Limit Among Covertness, Reliability, Latency and Throughput for IRS-Enabled Short-Packet Communications

Fundamental Limit Among Covertness, Reliability, Latency and Throughput for IRS-Enabled Short-Packet Communications

$\alpha$-Fair Resource Allocation for Downlink Multiuser Short Packet Communications

$\alpha$-Fair Resource Allocation for Downlink Multiuser Short Packet Communications

RIS-NOMA-assisted short-packet communication with direct links

Amidst the rapid evolution of next generation networks, meeting escalating demands for broad connectivity, minimal delay, and enhanced spectral efficiency is imperative. The fusion of reconfigurable intelligent surfaces (RIS) with non-orthogonal multiple access (NOMA) emerges as a promising approach to tackle these challenges. Our study zooms into the downlink setup, emphasizing short-packet communications (SPCs) and direct links. We concentrate on optimizing the performance of this RIS-NOMA fusion, meticulously deriving precise expressions for the average block error rate (ABLER) for near and far users. These ABLER metrics are pivotal for gauging system efficacy. A key focus of our inquiry lies in balancing blocklength and the number of RIS elements, vital for optimizing system performance. Our study underscores the intricate trade-offs involved and showcases the superiority of NOMA and RIS integration over conventional orthogonal multiple access (OMA) and RIS setups, especially in SPC scenarios. Our findings underscore both the challenges and a viable solution by leveraging the synergies between RIS and NOMA to boost network performance.

Reducing Latency in MEC Networks With Short-Packet Communications

Reducing Latency in MEC Networks With Short-Packet Communications

Average Error Probability for UAV-RIS Enabled Short Packet Communications

Average Error Probability for UAV-RIS Enabled Short Packet Communications