Spectrum Multiplier
for 4G & 5G

Universal Software Key to Unlock All Waveforms

Cohere’s software-based solution significantly improves spectrum and capacity for 4G and 5G.

The pioneering work in the Delay Doppler domain enables robust channel estimation and accurate channel prediction into the future. It alleviates handset feedback requirements by leveraging geometric reciprocity and reduces computation complexity through concise channel representation. All of these features combine to deliver significant spectrum multiplier effect for 4G and 5G networks in both FDD and TDD. Cohere’s software-based solution offers significant MU-MIMO benefits with no changes to existing handsets, and can work with existing base stations. The Cohere solution works in all available spectrum. Moreover, it allows 4G and 5G co-existence via a vendor neutral approach to dynamic spectrum reuse.

The Delay Doppler channel representation is predictable into the future given that its geometric nature is slow changing. This allows disaggregation of functions which enables Cloud RAN. Cloud RAN creates the foundation for improving cell edge performance via intercell coordination (CoMP).

The aggregated signal energy results in a coherent reconstruction of the transmitted signal at the receiver, which contributes to a stable, reliable and consistent behavior of the connection.

Cohere Makes Use of Delay Doppler to Translate Time Frequency to Enable MU-MIMO for FDD & TDD Spectrum

Cohere uses existing Handsets utilizing UL reference Signals and DL CQI to Accurately Determine & Predict Channels Between Transmitters & Receivers

  • Cohere channel estimation reveals all dominant reflectors which resolves MU-MIMO challenges
  • Software enables fully isolated, multiple beams – without the need for explicit UE feedback
  • By slowing down channel aging, the result is more predictable channels, improved spectrum reuse, performance and capacity

Cohere Spectrum Multiplier Software Platform

Cohere’s Spectrum Multiplier software platform improves the strength and efficiency of any generation (“any G”) mobile network. Cohere’s 3GPP standard-compliant and scalable software addresses the astronomical cost of acquiring new spectrum by enabling mobile network operators (MNOs) to improve the capacity, and increase the value, of all networks. Spectrum Multiplier software leveraging years of Cohere’s experience in advanced networking hardware development.

Cohere’s Spectrum Multiplier platform for the Radio Access Network (RAN) and Telco Cloud delivers on the promise of 5G by extending a mobile network’s spectral efficiency by as much as 2x, meaning a 5G user experience can be quickly and easily provided to end-users on all networks.

Cohere’s Spectrum Multiplier software can be integrated by network equipment suppliers in the RAN, or as an xApp in the Telco Cloud. Cohere’s platform has been engineered to overcome the challenges that exist in conventional methods, including: reference signal contamination (intercell interference); channel state information aging; stability under mobility and other channel dynamics; higher number of layers per antenna configuration; computational complexity; and the requirement for explicit device feedback. Cohere is the first company to solve the issue of channel state information aging, and overcome the latency challenges of moving critical intelligence from the RAN to cloud.

The capabilities of Cohere’s Spectrum Multiplier have been demonstrated and verified via numerous licensed spectrum network tests and scalability simulations with leading mobile network operators. Cohere first showcased its advantages in Feb. 2020 at Deutsche Telekom’s Headquarters in Bonn (Germany), as part of a public O-RAN showcase. Cohere showed a 2x spectrum and capacity multiplier effect for mobile devices connected to the commercial spectrum, with no changes to the devices, radios or antennas. Since then, Cohere has evolved its software to provide the same benefits for 5G.

In June 2021, Vodafone announced the results of a 5G Open RAN lab trial leveraging a SW solution from Cohere Technologies in partnership with Intel, VMware and CapGemini Engineering. Collectively, the technology partners demonstrated an end to end, multi-vendor, open platform and achieved “2X spectral efficiency” using Cohere’s Spectrum Multiplier capability.

Cohere’s Spectrum Multiplier platform can be integrated within the Radio Access Network (RAN) Distributed Unit (DU), the Central Unit (CU), or as an xApp in the RAN Intelligent Controller (RIC) within a telco cloud or O-RAN, without any changes to handsets, radios or antennas. The software works in any band, with any waveform, on any silicon platform.

The software will be available for the Telco Cloud by the end of 2021.

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