# Extending the Coverage of IEEE 802.15.4z HRP UWB Ranging
## 1 Introduction
In many practical deployments, such as low-power IoT devices, logistics networks, or cost-sensitive industrial applications, it is highly desirable to maximize UWB ranging capabilities using the existing hardware alone, without reliance on auxiliary sensors or external data fusion. However, extending the operating range purely through physical layer parameter optimization is particularly challenging due to the inherent link performance imbalance between the synchronization and data transmission portions of the UWB packet. This study specifically addresses these challenges by performing a detailed link budget analysis and experimentally validating a PHY-only optimization strategy, demonstrating that long-range UWB operation can be achieved while maintaining regulatory compliance and minimal system complexity. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Vendor** & **Chip or Module** & **Ranging Method** & **Frequency** & **Max Range (m)** & **Reference** \\ \hline Qorvo & DWM1000 & TWR, TDoA & 3.5–6.5 & \(\sim\)50 & [19; 20; 21; 22] \\ Qorvo & DW3000 & TWR, TDoA & 6.5, 8 & \(\sim\)50 & [16; 17; 23] \\ Qorvo & DW3120 & TWR, TDoA, PDoA & 6.5, 8 & \(\sim\)50 & [18; 24] \\ \hline NXP & SR150 & TWR, TDoA, PDoA & 6.24–8.24 & \(\sim\)50 & [25] \\ NXP & SR040 & TWR, TDoA & 6.24–8.24 & \(\sim\)50 & [26] \\ \hline Spark & SR1010 & TWR & 3.1–6 & \(\sim\)100 & [27] \\ Spark & SR1020 & TWR & 6–9.3 & \(\sim\)100 & [27] \\ \hline Qorvo & DW3000 & TWR & 6.5 & \(\sim\)300 & This Work \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Key performance comparisons of previous UWB research results. In this study, we focus on extending the fundamental ranging coverage of IEEE 802.15.4z HRP UWB purely through physical layer parameter optimizations, without relying on auxiliary sensors or external estimation techniques. We propose a method to extend the ranging capability of IEEE 802.15.4z HRP UWB systems to hundreds of meters. This is achieved through a detailed link budget analysis considering the packet structure, packet length, and transmission power within worldwide UWB local regulations. Our results show that by optimizing the physical and RF parameters based on a detailed link budget analysis that accounts for the inherent link performance imbalance between the SYNC (preamble) and the data portion (DP), UWB systems can achieve significantly extended ranging without violating power emission limits. This improvement is not merely a result of increasing the output power but rather addressing the link performance difference. By reducing the link differences between the SYNC and the DP, the overall packet reception performance is improved. Thus, the extended ranging capability is quantitatively supported by a more balanced and favorable link budget distribution across the full packet structure. We also experimentally verify the proposed method using Qorvo DW3000, and the experimental results are consistent with the theoretical analysis. Our experimental results show that by tuning these parameters while respecting the local regulation power constraints, a longer UWB operating range can be achieved. The composition of this paper is as follows. First, in Section 2, we explain the characteristics of HRP UWB technology based on UWB local regulations. Then, in Section 3, we analyze the link performance of IEEE 802.15.4z HRP UWB communication and analyze the parameters for long-range measurement of HRP UWB technology. In Section 4, we describe the experimental method and experimental results to verify these analysis results, and finally, in Section 5, we conclude the paper.