Signal Gain Comparison

1,000 Times More Gain than the gain of Traditional Wideband Boosters

Cel-Fi delivers 1,000 times the gain of the industry average thanks to the smart signal booster’s alldigital architecture.

The most powerful wideband analog boosters provide gains of about 70dB – compared to Cel-Fi’s 100dB gain. The 30dB gain difference relates to 1,000 times higher gain from Cel-Fi. All this gain is obtained from Cel-Fi digital core: since Cel-Fi reconstructs the signal obtained by the Window Unit, it is able to rebroadcast a clean signal, as if it was coming from the Operator carrier, at full power.

Why is this so important?

System gain is critical to a booster’s performance because it tells us how much a signal may be improved and how beneficial the boosted signal can be. For example, if you have a low level signal such as -90 dBm, adding 100 dB of System Gain gives +10 dBm, which can cover a large area. In contrast adding only 70 dB of gain would only give -20 dBm of signal per carrier which would only cover a much smaller space. Therefore a booster with a gain of 70 dB would need a very strong donor signal to be of much use, regardless of the stated transmit power.

In other words, the higher the gain of the booster, the better it will work, even when far away from a base station. Even with only one bar of signal at the Window Unit, Cel-Fi will provide a full five bars of signal. For the same 5 bars to be provided by a conventional signal booster, the original signal from the booster’s outdoor antenna would have to be -60dB – so high in fact that a booster would not be necessary in the first place.

This is also one of the reasons why Cel-Fi can be installed in five minutes: The system gain from the Cel-Fi digital core is so high that the smart signal booster provides a full strength carrier signal despite the Window Unit being placed indoors.

Cel-fi provides 100dB Gain – or 1,000 that of the industry average. Most traditional analog boosters provide 60dB. The more expensive traditional boosters provide up to 70dB, or 1000 less gain than Cel-Fi. Cel-fi provides up to 13,000 sq. ft. of coverage whereas most traditional analog boosters provide only 3000 to 6500 sq. ft. The more expensive traditional boosters that provide up to 10,000 square feet also require complex indoor antenna installation.