A method of controlling initial power ramp-up in cdma...

Details A method of controlling initial power ramp-up in cdma... A method of controlling initial power ramp-up in cdma...

H - Electricity

04

W

H04W 52/08 (2009.01)

Patent

CA 2413954

A subscriber terminal using a method of controlling initial power ramp-up in CDMA systems by using short codes is disclosed. The subscriber terminal includes having its transmission power regulated, with means for transmitting a periodic signal at an initial predetermined power level and repeatedly retransmitting the periodic signal each retransmission occurring at successively higher power levels; means for receiving a confirmation signal, and means for terminating transmission of the periodic signal in response to the received confirmation; means for engaging in a closed loop power control procedure to regulate the subscriber unit transmission power, after the periodic signal transmission terminating; and means for transmitting a call signal. The subscriber terminal using a method of controlling initial power ramp-up in CDMA systems by using short codes is particularly useful for overcoming the problems of power overshoot and interference to other subscriber stations known in the art and to provide for a base station to quickly synchronize to the spreading code used by the subscriber unit.

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