US Patent 7126982 Apparatus for rapid PN code acquistion

An apparatus and method of determining a signal code. The method comprising steps of acquiring and correlating a signal with a first code sequence. In response to the correlation of the signal with a first code sequence a timing lock is achieved. Also in response to the signal correlation, an acknowledgement from a receiver of the signal to a transmitter of the signal is sent where upon the receiver and transmitter change to a second code sequence.