Patent ID: 7020107

Claim:
A method comprising: transmitting a communication signal over each of one or more spatial division multiple access (SDMA) channels of a multi-access channel to one or more corresponding user terminals; determining a set of transmit spatial weights for a synchronization burst corresponding to one of one or more user terminals attempting to reestablish communication over an SDMA channel of the multi-access channel, the set of transmit spatial weights determined such that interference caused by one or more communication signals to the synchronization burst is reduced; broadcasting the synchronization burst to the corresponding user terminal; and determining a set of transmit spatial weights for a synchronization burst corresponding to a next user terminal of the one or more user terminals attempting to reestablish, communication over an SDMA channel of the multi-access channel, the set of transmit spatial weights determined such that interference between the synchronization burst corresponding to the next user terminal and the one or more communication signals is reduced.