High Sensitivity GPS

High Sensitivity GPS receivers like Assisted GPS can be used in many cases indoors. Although High Sensitivity GPS can't be used in some indoor situations. Also, it doesn't instantly work when it's been off for too long of a period of time. High Sensitivity GPS does not require additional infrastructure. Large banks of correlators and digital signal processing are used to search for GPS signals very quickly. Therefore, High Sensitivity GPS receivers are very fast to first get a "fix" when the signals are at their normal levels such as being outdoors. Even when GPS signals are weak such as being in indoor situations, the extra processing power can be used to integrate weak signals so that position and timing can still be utilized. High Sensitivity GPS receivers are able to acquire signals up to 1,000 times weaker than conventional GPS receivers, and may be up to 30 dB more sensitive. High Sensitivity GPS receivers are able to track through 3 layers of dry bricks or up to 20 cm of steel reinforced concrete.