Expanding Robust Communication to Twisted-Pair & Any Wire Networks
Originally designed for reliable data transmission over noisy power lines, Nessum (formerly HD-PLC) is now evolving to support a wider range of communication infrastructures, including twisted-pair networks.
Challenges in Power Line Communication
Communicating over power lines presents several major challenges:
- Noise Interference – Electrical devices generate various types of noise that can disrupt communication.
- Signal Reflection – The flexibility of power line connections causes complex signal reflections, leading to frequency-selective fading.
- High Attenuation – Power circuits have very low impedance, often just a few ohms, which results in over 10dB of signal loss.
Without advanced modulation and error correction, reliable communication under these conditions would be nearly impossible.
Nessum’s Advanced Solutions
To address these challenges, Nessum integrates state-of-the-art technologies that ensure exceptional robustness in harsh environments:
– LDPC-CC Forward Error Correction (FEC) and Retry Mechanism:
This powerful FEC method effectively corrects errors caused by noise. Additionally, a MAC-layer retry mechanism further enhances data recovery when FEC alone is insufficient. Together, these features ensure robust communication, even in environments with severe electromagnetic interference (EMI) such as electric fast transients (EFT) and surges.
– OFDM for Reflection Management :
Orthogonal Frequency-Division Multiplexing (OFDM) effectively reduces the impact of frequency-selective fading by dynamically allocating data to high CINR (Carrier-to-Interference-plus-Noise Ratio) carriers. This allocation dynamically updates as network conditions change, ensuring continuous optimization. This enables flexible, free-topology network configurations.
– State-of-the-Art Analog Front-End:
With a high dynamic range exceeding 100dB, Nessum’s advanced analog front-end technology effectively counteracts severe signal attenuation caused by low impedance. This high dynamic range enables point-to-point communication over distances exceeding 1 km. It also allows stable communication over several hundred meters, even in the presence of cable and split losses.
Beyond Power Lines: A New Era of Connectivity
By applying these innovations to twisted-pair & any wire networks, Nessum extends its robust and interference-resistant communication technology beyond traditional power line systems. As industries seek greater flexibility and reliability, Nessum is paving the way for the next generation of high-performance networking solutions.
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About the Author
Kengo Tamukai is a senior engineer specializing in wired and wireless communication technologies. With over 20 years of experience in LSI design, system architecture, and technical marketing, his expertise spans SoC design, OFDM-based technologies, and hybrid communication systems, driving innovation in modern digital networks.
