Achieving 3 Gbps peak download speed with X‑MIMO in the 7 GHz band for 6G

Samsung and KT have completed a field test that delivered a 3 Gbps downlink using an ultra‑high‑density antenna array. The experiment proves that X‑MIMO can boost capacity in the 7 GHz range while keeping equipment size comparable to current base stations.

Technical Solution

The trial employed a four‑fold increase in antenna elements, integrated into a form factor identical to existing hardware. By activating eight simultaneous data streams, the system leveraged spatial multiplexing to multiply throughput without expanding the radio footprint.

Ultra‑dense antenna architecture

The array packs four times more radiating elements into the same chassis, using compact printed‑circuit‑board (PCB) designs and advanced beam‑forming algorithms. This density enables finer spatial resolution, which directly translates into higher per‑user rates.

7 GHz band utilization

Operating at 7 GHz offers a sweet spot between mmWave’s high capacity and lower‑frequency coverage. The band supports wide channel bandwidths, allowing each of the eight streams to carry up to 375 Mbps, summing to the observed 3 Gbps.

Real‑world outdoor validation

KT reproduced realistic propagation conditions, testing the base station against a moving user device. This approach mirrors future network deployments where antennas must adapt to dynamic environments.

Future roadmap

Scaling the antenna count further, integrating AI‑driven beam steering, and aligning with emerging Samsung Galaxy S26 series handsets will be essential steps toward commercial 6G rollouts.

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