Patent ID: 8085814

Claim:
A transmitter comprising: a demultiplexer; a plurality of orthogonal frequency division multiplexing (OFDM) components each receiving demultiplexed data from the demultiplexer; a plurality of antennas, each antenna connected to a respective OFDM component of the plurality of OFDM components; the transmitter adapted to transmit a packet data frame structure comprising: a superframe having a length corresponding to a synchronization period of a network; the superframe containing a plurality of radio frames; each radio frame containing a plurality of TPS (transmission parameter signalling) frames corresponding to an adaptive coding and modulation period; each TPS frame containing a plurality of slots corresponding to an air interface slot size; each slot containing a plurality of OFDM symbols wherein the transmitter is adapted to transmit in a plurality of different modes by transmitting a different number of OFDM symbols per slot with an unchanged slot duration and with no change to the frame structure above the slot.