DYNAMIC CONFIGURATION OF A FLEXIBLE ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING PHY TRANSPORT DATA FRAME PREAMBLE
A method for operating a transmitting device to communicate with a receiving device is described herein. The method includes the step of the transmitting device selecting a root index value from a set of root index values. The method further includes the step of the transmitting device generating a frequency domain Constant Amplitude Zero Auto-Correlation sequence based on the selected root index value. The method further includes the step of the transmitting device modulating the Constant Amplitude Zero Auto-Correlation sequence by a pseudo-noise sequence. The method further includes the step of the transmitting device generating an Orthogonal Frequency Division Multiplexing symbol, wherein the frequency domain Constant Amplitude Zero Auto-Correlation sequence modulated by the pseudo-noise sequence defines subcarrier values for the Orthogonal Frequency Division Multiplexing symbol. The method further includes the step of the transmitting device transmitting the Orthogonal Frequency Division Multiplexing symbol as an initial Orthogonal Frequency Division Multiplexing symbol of a preamble of a frame to the receiving device.
1 . A receiver configured to be used in a broadcast network, the receive comprising:
a memory storing program instructions; and
a processor, upon executing the program instructions, configured to receive an initial Orthogonal Frequency Division Multiplexing (OFDM) symbol of a frame control and a subsequent OFDM symbol of the frame control,
wherein the initial OFDM symbol of the frame control is generated using a modulation of a frequency domain Constant Amplitude Zero Auto-Correlation (CAZAC) sequence by a pseudo-noise (PN) sequence,
wherein the frequency domain CAZAC sequence modulated by the PN sequence determines a service type associated with the broadcast communication frame and wherein the PN sequence is reset at a start of the preamble, and
wherein when the subsequent OFDM symbol corresponds to a last OFDM symbol of the frame control, the subsequent OFDM symbol is characterized by a 180° phase inversion of the frequency domain CAZAC sequence to signal, to the receiver, the termination of the frame control of the broadcast communication frame such that the frame control includes an extensible number of OFDM symbols to increase signaling capacity.