Apparatus and methods for providing efficient space-time structures for preambles, pilots and data for multi-input, multi-output communications systems

A non-transitory computer readable medium having instructions stored thereon, the instructions comprising:

• instructions to produce a plurality of pilot symbols derived from at least one sequence, wherein the at least one sequence is a Frank-Zadoff or Chu sequence;
• instructions to produce a plurality of data symbols;
• instructions to provide a space time structure for transmission, wherein the space time structure includes a time dimension including a plurality of symbol time intervals and a space dimension including a plurality of antenna outputs;
• and
• instructions to insert the plurality of pilot symbols and the plurality of data symbols into the space time structure for transmission in a multi-input, multi-output communications system, wherein the plurality of pilot symbols are inserted in the time and frequency domain for each antenna of the plurality of antenna outputs.

A method comprising:

• producing a plurality of pilot symbols derived from at least one sequence, wherein the at least one sequence is a Frank-Zadoff or Chu sequence;
• producing a plurality of data symbols;
• providing a space time structure for transmission, wherein the space time structure includes a time dimension including a plurality of symbol time intervals and a space dimension including a plurality of antenna outputs;
• and
• inserting the plurality of pilot symbols and the plurality of data symbols into the space time structure for transmission in a multi-input, multi-output communications system, wherein the plurality of pilot symbols are inserted in the time and frequency domain for each antenna of the plurality of antenna outputs.

A multi-input, multi-output communications system comprising:

• an encoder configured to:
• produce a plurality of pilot symbols derived from at least one sequence, wherein the at least one sequence is a Frank-Zadoff or Chu sequence;
• receive a plurality of data symbols;
• provide a space time structure for transmission, wherein the space time structure includes a time dimension including a plurality of symbol time intervals and a space dimension including a plurality of antenna outputs;
• and
• insert the plurality of pilot symbols and the plurality of data symbols into the space time structure, wherein the plurality of pilot symbols are inserted in the time and frequency domain for each antenna of the plurality of antennas;
• and
• a plurality of modulators configured to receive an output of the encoder;
• and
• a plurality of antennas configured to receive outputs of the plurality of modulators.

A multi-input, multi-output communications system comprising:

• a plurality of antennas;
• a plurality of demodulators configured to receive outputs from the plurality of antennas;
• and
• a decoder configured to receive the output of the plurality of demodulators and further configured to:
• recover data from a received space time structure, wherein the space time structure includes a time dimension including a plurality of symbol time intervals and a space dimension associated with the plurality of antennas;
• wherein a plurality of pilot symbols and a plurality of data symbols are inserted into the space time structure;
• wherein the pilot symbols are inserted in the time and frequency domain for each antenna of the plurality of antennas;
• wherein the pilot symbols are derived from at least one sequence;
• and wherein the at least one sequence is a Frank-Zadoff or Chu sequence.