What are the reference values for GSM antenna transmit power and sensitivity?

　　I'm not sure how familiar you are with GSM antenna transmit power and sensitivity. Below, we'll explain these issues. We hope this explanation will help you resolve these issues.

　　A base station's actual transmit power consists of the power of overhead channels (such as pilot, control, and paging channels) plus the power of traffic channels.

　　A base station's transmit power depends on the antenna type, the number of active channels, and the distance from the mobile phone. It ranges from tens of watts, such as 10W+ or 40W-60W.

　　The GSM antenna protocol stipulates that mobile phone transmit power can be controlled by the base station (via the downlink SACCH). The minimum transmit power for a GSM mobile phone is 5dBm (GSM900), approximately 3.2mW; the maximum transmit power is 33dBm (GSM900), approximately 2W. In obstructed conditions or when far from a base station, mobile phones use higher transmit power to ensure communication quality. On the other hand, while ensuring communication quality, mobile phone transmit power should be as low as possible. Mobile phone transmit power may also fluctuate during a call.

　　In a code division multiple access system, the system accurately controls mobile phone transmit power in real time (every 1.25ms). Mobile phone transmit power in a CDMA system is controlled to the minimum power that ensures voice reception quality, resulting in nearly equal signal levels from each mobile station reaching the base station.