Patent ID: 8055140

Claim:
An apparatus comprising: an interface configured to: send one or more instructions to a phase modulation array, the phase modulation array comprising a plurality of channel pixel sets, each channel pixel set configured to modulate a phase of a channel of a plurality of channels, the plurality of channel pixel sets comprising one or more first channel pixel sets that modulate one or more first phases of one or more first channels and one or more second channel pixel sets that modulate one or more second phases of one or more second channels, at least one second channel using a phase modulation format; and one or more tangible computer-readable storage media storing logic configured to: instruct the one or more first channel pixel sets to modulate the one or more first phases at a first constant phase; and instruct the one or more second channel pixel sets to modulate the one or more second phases at a second constant phase to create a group delay between the first channels and the second channels, the second constant phase different from the first constant phase the logic further configured to: receive a request for a signal modulation format for a second channel; access a system profile indicating a group delay value for the second channel; and determine the second constant phase according to the group delay value.