As a core pillar of the company, the SEUM Digital R&D Center is dedicated to reducing costs and developing
new technologies for LCD modules (LCMs).
We respond rapidly to fast-evolving technologies and customer needs, actively
researching and developing next-generation growth drivers in displays and electronic components.
As an industry leader, we are committed to staying aligned with our customers and delivering the highest level of service.
Furthermore, we are investing in ultra-broadband technology as a future growth engine,
paving the way for the company’s long-term success.

UWB

As global demand for short-range wireless communication continues to grow, new technologies aimed at using radio frequency spectrum more efficiently are actively being developed worldwide.
Among the most promising candidates for efficient frequency utilization is UWB (Ultra Wideband), a short-range wireless communication technology that is receiving increasing attention.

Unlike conventional wireless systems that rely on high-frequency radio carriers, UWB technology operates in the baseband, utilizing a very wide frequency range—spanning several gigahertz—for data transmission.
This allows UWB to be applied in various fields such as communication, radar systems, and precise positioning, making it a next generation wireless technology.

What is the difference between UWB and Bluetooth?

Type	UWB	Bluetooth
Frequency Band	GHz range	2400 ~ 2483 MHz
Communication Range	100m	10m
Transfer Rate	1~100Mbps	1Mbps
Power Output	0.2~2mW	1mW

UWB can achieve higher accuracy and broader applicability than Bluetooth due to its use of a much wider frequency band.

[Comparison of Narrowband, Wideband, CDMA, and UWB Spectrums]

As shown in the figure above, when comparing three systems with the same output in terms of frequency spectrum, the UWB system exhibits significantly lower spectral power density over more than 25% of its occupied bandwidth around the center frequency.
In contrast to conventional narrowband systems or wideband CDMA systems, this allows UWB to share frequency bands without causing interference, making it highly advantageous for coexistence with existing wireless communication systems.

The UWB (Ultra Wideband) system uses ultra-short pulses in the nanosecond or picosecond range, resulting in very low spectral power density across a very wide frequency range.
This enables high security, high data transmission rates, precise distance and position measurement, and strong resilience to multipath interference, all of which contribute to UWB's high-resolution performance.

Core Technologies of UWB

UWB (Ultra Wideband) is a type of communication technology capable of locating people or objects with high precision—typically within 10 to 30 centimeters. UWB communication commonly utilizes two core technologies: TDOA (Time Difference of Arrival) and TOF (Time of Flight).

TOF(Time of Flight)

TOF is a measurement method based on two-way ranging and response time.
In this method, a tag must send and receive signals multiple times with an anchor, and the distance between them is calculated based on the time it takes for the signal to travel.

TOF Communication Process

TOF Communication Diagram

TDoA(Time Difference of Arrival)

TDoA measures the time difference between when a signal arrives at multiple anchors.
This technique requires precise time synchronization among the anchors.
When using the TDoA method, a UWB tag sends a poll message, and all surrounding UWB anchors receive it and record the exact time of arrival.
By comparing these time differences, the system can accurately determine the location of the tag.

TDoA Communication Process

TDoA Communication Diagram

Comparison of TOF and TDoA

Category	ToF	TDoA
Power consumption	High	Low
Tag capacity	Less	Less
Synchronization requirements	Low	High
Out of area positioning	Support	No Support

System Capacity

The TOF method is based on two-way ranging, requiring time synchronization between each tag and anchor.
In this method, a UWB tag must send and receive signals multiple times with anchors during the ranging process. In contrast, the TDOA method requires only a single broadcast message from the tag, making it more efficient in terms of system capacity.

Power Consumption

Anchors are typically powered by AC, while tags operate on batteries.
In the TOF method, the UWB tag must perform ranging with each anchor individually, sending and receiving signals multiple times during each process.
As a result, this leads to increased power consumption and shorter battery life for the tag.

Environmental Requirements

TDoA is based on the time difference of arrival and typically uses a hyperbolic algorithm to calculate position.
Location accuracy is high within the area surrounded by anchors, but degrades significantly outside of that coverage area.

Use Cases of UWB Technology

TOF(Time of Flight)

UWB enables highly accurate positioning even in indoor environments where GPS signals cannot reach.
It can be used to track the location of equipment and work zones in real time across a wide range of settings—including warehouses, logistics centers, sports facilities, industrial sites, airports, hospitals, ports, factories, and smart cities.
By doing so, UWB improves operational efficiency and enhances workplace safety.
Thanks to its high precision and low power consumption, UWB technology is being increasingly adopted in various industries.

Logistics

Retail

Sports

Industry

Airport

Hospital

Port

Smart City

Building Site

UWB R&D in UWB Technology

SEUM Digital is a manufacturer and IT solutions provider specializing in the research and development of UWB module applications and a wide range of customized services.
We develop our own proprietary systems that encrypt precise location data to enable secure communication and ensure real-time location tracking and on-site situation control in any environment.
Our ongoing R&D focuses on integrated management solutions that enhance safety, responsiveness, and operational efficiency.