A Tower Mounted Amplifier or Mast Head Amplifier is a Low-noise amplifier (LNA) mounted as close as practical to the antenna in mobile masts or Base Transceiver Stations. A TMA reduces the base transceiver station noise figure (NF) and therefore improves its overall sensitivity; in other words the mobile mast is able to receive weaker signals.
Read more about Tower Mounted Amplifier: Benefits in Mobile Communications, Drawbacks/pitfalls, Mathematical Principles, See Also
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—John Milton (1608–1674)