TRANSMISSION OF SYMBOLS IN A MIMO ENVIRONMENT USING ALAMOUTI BASED CODES

• US 20110069780A1
• Filed: 09/01/2010
• Published: 03/24/2011
• Est. Priority Date: 09/04/2008
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Apple Inc.
• Inventors: Nikopourdeilami, Hosein, NOVAK, Robert, Vrzic, Sophie, Fong, Mo-Han
• Granted Patent: US 9,276,655 B2
• Time in Patent Office: Days
• US Class Current: 375/295
• CPC Class Codes: H04B 7/0473 taking constraints in layer or codeword to antenna mapping into account
• CPC Class Codes: H04B 7/0667 of delayed versions of same signal using space-time coding H04L1/0618
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0067 Rate matching H04L1/0013 and H04L1/08 take precedence
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 1/0643 block codes
• CPC Class Codes: H04L 1/0668 Orthogonal systems, e.g. using Alamouti codes
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1816 with retransmission of the same, encoded, message
• CPC Class Codes: H04L 1/1893 Physical mapping arrangements physical resource mapping in general H04L5/00
• CPC Class Codes: H04L 27/2634 Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation
• CPC Class Codes: H04L 5/0026 Division using four or more dimensions

Abstract

A method for transmitting data in a multiple-input-multiple-output space-time coded communication using a mapping table mapping a plurality of symbols defining the communication to respective antennae from amongst a plurality of transmission antennae and to at least one other transmission resource. The mapping table may comprise Alamouti-coded primary segments and may also comprise secondary segments, comprising primary segments. The primary segments in the secondary segments may be defined in accordance to an to Alamouti based code pattern applied at the segment level to define a segment-level Alamouti based code.

Claims

1. A method for transmitting data in a multiple-input-multiple-output space-time coded communication comprising:

a. transmitting a plurality of sets of symbols over a plurality of antennae and respective transmission resources according to a mapping table, the mapping table mapping the plurality of symbols defining the communication to respective antennae from amongst the plurality of transmission antennae and to their respective transmission resource;

wherein the transmitting comprises transmitting symbols forming at least a part of a segment-level Alamouti based code in the mapping table.

2. The method of claim 1, wherein the transmitting further comprises transmitting symbols forming part of a symbol-level Alamouti based code.

3. The method of claim 2, wherein the transmitting comprises transmitting symbols that form a part of both the symbol-level Alamouti based code and the segment-level Alamouti based code.

4. The method of claim 1, wherein the mapping table comprises:

a. a plurality of primary segments each comprising a plurality of components corresponding to individual symbols together defining a symbol-level Alamouti based code; and

b. at least one secondary segment comprising a plurality of primary segments together defining a segment-level Alamouti based code.

5. The method of claim 4, wherein the each of at least one secondary segment comprise four primary components.

6. The method of claim 4, wherein the segment-level Alamouti based code defined by the at least one secondary segment is a partial Alamouti based code.

7. The method of claim 4, wherein the at least one secondary segment each comprise a plurality of primary segments together defining a segment-level Alamouti based code at the primary segment level, the mapping table further comprising at least one tertiary segment comprising a plurality of secondary segments together forming a segment-level Alamouti based code at the secondary segment level.

8. The method of claim 1, wherein the transmitting comprises transmitting a first set of symbols over the plurality of antennae and a first transmission resource and confirming whether the first set of symbols has been successfully transmitted.

9. The method of claim 8, further comprising if the first set of symbols is not confirmed to have been successfully transmitted, transmitting a second set of symbols over the plurality of antennae and a second transmission resources.

10. A method for transmitting data in a multiple-input-multiple-output space-time coded communication comprising

a. defining a mapping table for mapping a plurality of symbols defining the communication to respective antennae from amongst a plurality of transmission antennae and to respective transmission resources;

b. populating the mapping table by;

i. defining a plurality of primary segments of the mapping table, each of the plurality of primary segments comprising a plurality of components corresponding to individual symbol transmissions together defining a symbol-level Alamouti based code; and

ii. defining a secondary segment of the mapping table, the secondary segment comprising a plurality of primary segments together defining a segment-level Alamouti based code; and

c. transmitting the symbols in the mapping table with the plurality of antennae according to the mapping table.