| 摘要 |
An apparatus for extracting forward and reverse switching control signals of a mobile Internet wireless repeater is provided to enhance speech quality at a low cost by switching switches of a mobile Internet wireless repeater by using a forward time without installation of a high-priced base station equipment in an indoor space and a shadow area. The first antenna(200) receives a signal outputted from a base station and transmits a reverse mobile station signal selected through the first switch(201) to the base station. The first switch(201) selects one of the forward signal received from the first antenna(200) and a reverse signal transferred through the third switch(204). The second switch(202) selects one of the forward signal selected by the first switch(201) and a reverse signal transferred through the fourth switch(205). A filter/amplifier(203) filters the forward and reverse signals selected by the second switch(202), amplifies them, and controls their gain. The third switch(204) selects a forward direction or a reverse direction in order to transmit an output signal of the filter/amplifier(203). The fourth switch(205) selects the forward signal or the reverse signal transferred through the third switch(204). The second antenna(206) transmits a base station signal transferred through the fourth switch(205) to a mobile station or receives a signal outputted from the mobile station. A forward output detector(207) detects a forward output level transferred through the fourth switch(205) and transfers it to a controller(208). The controller(208) receives an output signal of the forward output detector(207), measures a duration time of the forward signal, checks whether the measured duration time is the same as certain time received from the base station, calculates pre-determined forward time and reverse time based on the certain time if the measured duration time is the same as the certain time, and outputs a corresponding switch control signal to the first to fourth switches(201,202,204,205) to switch the forward and reverse signals without being interfered each other.
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