As we begin the journey towards 3GPP standards-based 6G, the conversation about which waveform will power this next generation of wireless technology is already in full swing. Some argue that #OFDM still hold promise. In contrast, others believe we need to look forward more disruptive solutions like OTFS (Orthogonal Time Frequency Space) and other modified forms of OFDM (Orthogonal Frequency-Division Multiplexing).
Reflecting on the evolution from 2G TO 5G, one thing is abundantly clear: the landscape of wireless communication has shifted. What began as basic voice connectivity on 2G has transformed into a world where we demand high-speed video, real-time sensing, Hyper-Reliable Low Latency Communication (HRLLC), and massive IoT connectivity, across a diverse range of use cases and frequencies. Can we really expect a single waveform to meet the needs of everything from voice calls to video streaming to real-time machine communication and sensing, that too on an ever-increasing number of frequencies till THz?
The answer, in my view, is no. While single-waveform solutions were sufficient for previous generations, the demands of 6G are vastly different. The diverse spectrum of services we are trying to deliver requires a flexible, adaptable approach- and that’s where we need to shift our focus.
Rather than continuing the search for the “one-size-fits-all” waveforms, I believe the industry’s attention should be on enabling multiple waveforms to coexist seamlessly in devices and infrastructure. After all, we’re already witnessing the power of multi-standard radios, which allow devices to operate across multiple legacy waveforms. Why not extend this flexibility to 6G, enabling optimized waveforms tailored to specific use cases- be it for high-throughput video, low-latency mission-critical services, or sensor-driven IoT applications?
Incorporating multiple waveforms will unlock the potential to maximize efficiency, minimize interference, and ensure that we can meet the desired demands of each use case. Whether it’s the need for massive scalability or precision timing, supporting a range of waveforms give us the flexibility to design wireless networks that are more resilient, dynamic, and fit for the future.
The key question is this: how do we evolve from the idea of a single waveform to a world where different waveforms are optimized for different use cases? The answer lies in collaboration across all stakeholders- from network providers and hardware manufacturers to researchers and standard bodies.
For 6G, the vision should be clear: a multi-waveform ecosystem that adapts to the varying needs of tomorrow's connectivity challenges, providing the correct waveform for the right job.
In conclusion, as we embark on the path to 6G, let’s not be constrained by legacy thinking. The future of wireless communication isn’t about a single waveform- it’s about empowering networks with the versatility to deliver diverse services across the spectrum. It’s time to think beyond a singular solution and embrace a multi-waveform future.
The challenge is complex, but the opportunity is immense. Let’s make sure we are designing networks for the needs of tomorrow- not just for today.