Solutions for Evaluating Beamforming Performance in LTE Base Stations

Solutions for Evaluating Beamforming Performance in LTE Base Stations

Application Notes

A key challenge in any modern wireless cellular communication system is performance at the cell edge. Here, performance demands are at their highest and user devices experience the most degraded signal-to-noise conditions, as well as, the highest levels of inter-cell interference. This explains why a multi-antenna technique like beamforming, which improves signal quality and cell coverage and reduces interference, plays such a central role in delivering Long Term Evolution (LTE) and its variants’ (e.g., Time Division Duplex LTE (TD-LTE), Frequency-Division LTE (FD-LTE) and LTE-Advanced) services.

Beamforming is a technique used to control the direction of the reception or transmission of a signal at an antenna array. In the most general case, transmit beamforming works by exploiting the interference patterns observed whenever the same signal is transmitted from two or more spatially separated transmission points. A similar principle applies whenever the same signal is received at two or more spatially separated reception points, which is exploited by receive beamforming techniques.

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