Patent ID: 8547822

Claim:
A method of grouping orthogonal frequency-division multiple access (OFDMA) symbols, and subgroups of OFDMA subcarriers/subchannels therein, to enable stacked carrier spread spectrum (SCSS) and SCSS adaptive array processing, the method being performed in an adaptive antenna system, the method comprising: constructing one or more subframes, each subframe including: a plurality of access subchannels, wherein each access subchannel k is paired with access subchannel k+n/2, where n is the total number of subchannels, and k is an index of access subchannels designated for access, and wherein each access subchannel contains at least one data burst region; a predefined number of orthogonal frequency-division multiple access (OFDMA) symbols containing training preambles for an adaptive antenna system (AAS) and distributed across all access subchannels that demarcate a selected AAS zone and are used to adapt stacked carrier spread spectrum adaptive array processing at a receiving station; and a plurality of payload subchannels, wherein each payload subchannel j is paired with payload subchannel j+n/2 where n is the total number of subchannels and j is an index of payload subchannels designated for data transport, wherein each payload subchannel contains at least one data burst region, and wherein each payload subchannel is exactly one or two AMC bins by c OFDM symbols and where c is less than or equal to the number of symbols in the subframe.