Method of adaptive frequency assignment to a plurality of antennas

• US 8,514,795 B2
• Filed: 12/18/2008
• Issued: 08/20/2013
• Est. Priority Date: 12/21/2007
• Status: Expired due to Fees

• Current Assignee: InterDigital CE Patent Holdings SAS (InterDigital, Inc.)
• Original Assignee: Thomson Licensing (Vantiva SA)
• Inventors: Guillouard, Samuel, Demoulin, Vincent
• Primary Examiner(s): Ton, Dang
• Assistant Examiner(s): Kaur, Pamit
• Application Number:
  US12/735,167
• Publication Number:
  US 20120051294A1
• Time in Patent Office: 1,706 Days
• Field of Search: 370/389, 370/343
• US Class Current: 370/329
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0669 using different channel coding between antennas space-time coding H04L1/0618
• CPC Class Codes: H04B 7/068 using space frequency diversity space-frequency coding H04L1/0606
• CPC Class Codes: H04B 7/0891 Space-time diversity rake receivers H04B1/7115; space-time decoding H04L1/0631
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling

Abstract

In order to improve the quality of transmission and reception of data packets, the method of transmission using several antennas comprises:

• • an encoding of a first data packet into a first encoded block;
  • a mapping of first transmission frequency channel to a first set comprising at least a transmission antenna;
  • a mapping of second transmission frequency channel to a second set comprising at least a transmission antenna, the first transmission frequency channel being different of the second transmission frequency channel;
  • a transmission of the first encoded block on the first set of at least a transmission antenna and on the second set of at least a transmission antenna.

The method of reception comprises a mapping of different frequency channel to reception antennas.

Claims

1. Method of transmission of at least a data packet by several transmission antennas configured to transmit a signal, wherein it comprises:

an encoding of a first data packet into a first encoded block and a second data packet into a second encoded block;

a mapping of first frequency channel to a first set comprising at least a transmission antenna;

a mapping of second frequency channel to a second set comprising at least a transmission antenna, the first frequency channel being different from the second frequency channel;

a transmission of the first encoded block on the first set of at least a transmission antenna and on the second set of at least a transmission antenna;

if quality of reception at first frequency channel is lower than a threshold,

a mapping to second frequency channel or third frequency channel different from first frequency channel to the first set comprising at least a transmission antenna; and

a transmission of the second encoded block on the first set of at least a transmission antenna and on the second set of at least a transmission antenna.

2. Method according to claim 1, wherein, if quality of reception at first frequency channel is greater than a threshold, it comprises:

a mapping to first frequency channel or third frequency channel different from second frequency channel to at least a part of the second set comprising at least a transmission antenna; and

a transmission of the second encoded block on the first set of at least a transmission antenna and on the second set of at least a transmission antenna.

3. Method according to claim 1, wherein it comprises a mapping of antenna according to noise levels, each noise level being associated to each frequencies.

4. Method according to claim 2, wherein noise levels are measured at the transmitter.

5. Method according to claim 1, wherein it comprises:

a mapping of antenna according to at least a reception quality level at a given frequency channel; and

a reception of at least a reception quality level information, the reception quality level information being transmitted by a receiver.

6. Method according to claim 5, wherein the reception quality level information is transmitted by a receiver used as destination of first encoded blocks.

7. Method according to claim 1, wherein the transmission of the first encoded block on the first set of at least a transmission antenna is made at a first power level and on the second set of at least a transmission antenna at a second power level, the first power level being lower than the second power level.

8. Method according to claim 1, wherein the encoding of first data packet into the first encoded block is a space time or space frequency block encoding.

9. Method of reception of at least a data block by several reception antennas configured to receive a signal, the method being implemented in one receiver, wherein the method comprises:

mapping of first frequency channel to a first set comprising at least a reception antenna;

mapping of second frequency channel to a second set comprising at least a reception antenna, the first frequency channel being different from the second frequency channel;

receiving of at least a first encoded block on the first set of at least a reception antenna and on the second set of at least a reception antenna;

decoding of the at least one received first encoded block into at least one first data packet;

testing of quality of reception of the signal at a first frequency channel;

checking for a modification of transmission frequency channel mapping; and

adapting the frequency channel mapping on reception antennas on transmission frequencies used by the transmitter according to the checked result.

10. Method according to claim 9, wherein it comprises the transmission of an information representative of at least a reception quality level at a determined frequency channel, the information being transmitted to the transmitter transmitting the first encoded block.