arXiv 2104.040852021-04-26cs.ITmath.IT

Manchester Encoding for Non-coherent Detection of Ambient Backscatter in Time-Selective Fading

J. Kartheek Devineni, Harpreet S. Dhillon

英文摘要：

Simplifying the detection procedure and improving the bit error rate (BER) performance of a non-coherent receiver in ambient backscatter is vital for enhancing its ability to function without the channel state information (CSI). In this work, we analyze the BER performance of Manchester encoding which is implemented at the transmitter for data transmission, and demonstrate that the optimal decision rule is independent of the system parameters. Further, through extensive numerical results, it is shown that the ambient backscatter system can achieve a signal-to-noise ratio (SNR) gain with Manchester encoding compared to the commonly used uncoded direct on-off keying (OOK) modulation, when used in conjunction with a multi-antenna receiver employing the direct-link cancellation.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

阅读原文

阅读 PDF ↗

arXiv 页面 ↗HTML 原文 ↗

本文内容

英文摘要相关论文

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

继续探索

相关论文

Capacity of Backscatter Communication under Arbitrary Fading Dependence

We analyze the impact of arbitrary dependence between the forward and backward links in backscatter communication systems. Specifically, we quantify the effect of positive and negative dependence between these fading links on channel capacity, using Copula theory. The benefits of this approach are highlighted over the classical framework of linear dependence based on Pearson's correlation coefficient, which is also analyzed. Results show that for a fixed transmit power budget, capacity grows with positive dependence as well as with fading severity in the low signal-to-noise ratio (SNR) regime.…

2021-05-28cs.ITmath.IT

Nakagami-m 衰落中采用标签选择的能量收集反向散射通信的保密性能分析

Secrecy Analysis of Energy-Harvesting Backscatter Communications with Tag Selection in Nakagami-m Fading

本文针对 Nakagami-m 衰落下的非线性能量收集反向散射通信，分析四种标签选择方案的保密性能，推导 SOP 与 IP 的闭式及渐近表达式并通过仿真验证。

2025-03-16cs.ITmath.IT

Non-coherent Detection and Bit Error Rate for an Ambient Backscatter Link in Time-Selective Fading

This paper focuses on the non-coherent detection in ambient backscatter communication, which is highly appealing for systems where the trade-off between signaling overhead and the actual data transmission is very critical. Modeling the time-selective fading channel as a first-order autoregressive (AR) process, we propose a new receiver architecture based on the direct averaging of the received signal samples for detection, which departs significantly from the energy averaging-based receivers considered in the literature. For the proposed setup, we characterize the exact asymptotic bit error ra…

2021-04-27cs.ITmath.IT

打破反向散射通信中的干扰与衰落困局：最新进展、设计挑战与未来方向

Breaking the Interference and Fading Gridlock in Backscatter Communications: State-of-the-Art, Design Challenges, and Future Directions

本文系统综述了反向散射通信中直连链路干扰、标签间互干扰和双径衰落三大核心问题的现有解决方案与最新进展，并展望了未来设计方向。

2024-01-09cs.ITmath.IT

Performance Analysis of Backscatter Communication Systems with Non-orthogonal Multiple Access in Nakagami Fading Channels

Backscatter communication (BackCom) has been emerging as a prospective candidate in tackling lifetime management problems for massively deployed Internet-of-Things devices, which suffer from battery-related issues, i.e., replacements, charging, and recycling. This passive sensing approach allows a backscatter sensor node (BSN) to transmit information by reflecting the incident signal from a carrier emitter without initiating its transmission. To multiplex multiple BSNs, power-domain non-orthogonal multiple access (NOMA), which is a prime candidate for multiple access in beyond 5G systems, is f…

2020-06-22cs.ITeess.SPmath.IT

Ambient Backscatter Systems: Exact Average Bit Error Rate under Fading Channels

The success of Internet-of-Things (IoT) paradigm relies on, among other things, developing energy-efficient communication techniques that can enable information exchange among billions of battery-operated IoT devices. With its technological capability of simultaneous information and energy transfer, ambient backscatter is quickly emerging as an appealing solution for this communication paradigm, especially for the links with low data rate requirement. In this paper, we study signal detection and characterize exact bit error rate for the ambient backscatter system. In particular, we formulate a…

2018-04-25cs.ITcs.NImath.IT

更多相关论文收起更多论文

Cooperative Ambient Backscatter Communications for Green Internet-of-Things

Ambient backscatter communication (AmBC) enables a passive backscatter device to transmit information to a reader using ambient RF signals, and has emerged as a promising solution to green Internet-of-Things (IoT). Conventional AmBC receivers are interested in recovering the information from the ambient backscatter device (A-BD) only. In this paper, we propose a cooperative AmBC (CABC) system in which the reader recovers information not only from the A-BD, but also from the RF source. We first establish the system model for the CABC system from spread spectrum and spectrum sharing perspectives…

2018-01-04cs.ITmath.IT

Transceiver Design for Ambient Backscatter Communication over Frequency-Selective Channels

Existing studies about ambient backscatter communication mostly assume flat-fading channels. However, frequency-selective channels widely exist in many practical scenarios. Therefore, this paper investigates ambient backscatter communication systems over frequency-selective channels. In particular, we propose an interference-free transceiver design to facilitate signal detection at the reader. Our design utilizes the cyclic prefix (CP) of orthogonal frequency-division multiplexing (OFDM) source symbols, which can cancel the signal interference and thus enhance the detection accuracy at the rea…

2018-12-29cs.ITmath.IT

Achievable information rates of ambient backscatter communications

Ambient backscatter is an intriguing wireless communication paradigm that allows small devices to compute and communicate by using only the power they harvest from radio-frequency (RF) signals in the air. Ambient backscattering devices reflect existing RF signals emitted by legacy communications systems, such as digital TV broadcasting, cellular or Wi-Fi ones, which would be otherwise treated as harmful sources of interference. This paper deals with the ultimate performance limits of ambient backscatter systems in broadband fading environments, by considering different amounts of network state…

2016-05-16cs.ITmath.IT

Coverage Probability Analysis Under Clustered Ambient Backscatter Nodes

In this paper, we consider a new large-scale communication scheme where randomly distributed AmBC nodes are involved as secondary users to primary transmitter (PT) and primary receiver (PR) pairs. The secondary communication between a backscatter transmitter (BT) and a backscatter receiver (BR) is conducted by the BT's reflecting its corresponding PT's signal with different antenna impedances, which introduces additional double fading channels and potential inter-symbol-interference to the primary communications. Thus, at a typical PR, the backscatter signals are regarded as either decodable s…

2019-07-11cs.ITcs.NImath.IT

Hybrid Beamformer Design for High Dynamic Range Ambient Backscatter Receivers

In bi-static Ambient Backscatter Communications (AmBC) systems, the direct path from the ambient source to the receiver can be several orders of magnitude stronger than the scattered path modulated by the AmBC device. Because of the large power difference between these two signals, the receiver needs to operate at a large dynamic range. In this paper, we propose a novel analog-digital hybrid null-steering beamformer which allows the backscatter receiver to detect and decode the weak AmBC-modulated signal buried in the strong direct path signals and the noise without requiring the instantaneous…

2019-01-21cs.ITmath.IT

基于码索引调制与差分混沌键控的新型环境反向散射通信系统设计

Design of a New CIM-DCSK-Based Ambient Backscatter Communication System

提出CIM-DCSK-AmBC系统，利用码索引调制提高数据速率并消除直传干扰，理论推导BER，仿真表明优于SR-DCSK-AmBC基准。

2023-09-05cs.ITeess.SPmath.IT

Design of Ambient Backscatter Training for Wireless Power Transfer

Wireless power transfer (WPT) using energy beamforming is a promising solution for low power Internet of Things (IoT) devices. In this work, we consider WPT from an energy transmitter (ET) employing retrodirective WPT using a large phased antenna array to an energy receiver (ER) capable of ambient backscatter. The advantage of retrodirective WPT is that no explicit channel estimation is needed at the ET and the use of ambient backscattering eliminates the need for active transmission at the ER. We propose a training sequence design, i.e., pattern of varying the reflection coefficient at the ER…

2020-08-11cs.ITeess.SPmath.IT

κ-μ衰落中独立非同分布SNR随机变量的第k个最大顺序统计量的分布及其在6G中的应用

Distribution of $k$-th Maximum Order Statistics of Independent, & Non-Identical SNR random variables in $κ-μ$ fading and its applications in $6G$

IIT Madras（印度理工学院马德拉斯分校）

研究κ-μ衰落中独立非同分布SNR随机变量第k个最大顺序统计量的分布，运用极值理论推导其渐近分布，还导出特殊情况，通过多应用展示意义，推导相关表达式，经蒙特卡罗模拟验证结果准确性。

2026-07-22cs.ITeess.SPmath.IT

通过流体天线阅读器增强环境反向散射通信的连接性

Fluid Antenna-Enabled Backscatter Communication under Imperfect Channel Observations

Aalto University（阿尔托大学）；University of Granada（格拉纳达大学）；University College London（伦敦大学学院）

本文提出一种基于流体天线系统的AmBC方案，通过动态选择天线位置和优化调制系数，提升连接性能并满足能量收集约束。

2026-08-10cs.ITeess.SPmath.IT

一种适用于视距场景的易处理乘积信道模型

A Tractable Product Channel Model for Line-of-Sight Scenarios

本研究提出一种基于两个独立不同分布$\kappa$-$\mu$阴影随机变量乘积的视距场景易处理衰落模型，推导了相关闭式表达式，可简化信道表征，在多种通信场景中拟合性能更优、物理解释更完整。

2019-05-15cs.ITmath.IT