Patent ID: 7397780

Claim:
An apparatus for overlaying a second CDMA system over a first CDMA system comprising: means for transmitting a first signal as a first transmitted signal using a first CDMA channelization; means for transmitting a second signal as a second transmitted signal using a second CDMA channelization, wherein said first and second CDMA channelization share at least a portion of a common frequency spectrum and wherein said first transmitted signal and said second transmitted signal are transmitted as a combined output into a common coverage area; means for obtaining signal energy from said combined output corresponding to said first transmitted signal; means for obtaining signal energy from said combined output corresponding to said second transmitted signal; means for comparing a phase of said first transmitted signal to a phase of said second transmitted signal to generate a phase error indication based upon said obtained signal energies; and means for adjusting a phase at which said second signal is transmitted in response to said phase error indication.