WIRELESS COMMUNICATION TERMINAL AND COMMUNICATION CONTROL METHOD

• US 20110179330A1
• Filed: 07/28/2009
• Published: 07/21/2011
• Est. Priority Date: 07/30/2008
• Status: Abandoned Application

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: Matsumoto, Naohisa
• Application Number:
  US13/056,587
• Publication Number:
  US 20110179330A1
• Time in Patent Office: Days
• US Class Current: 714/748
• CPC Class Codes: H03M 13/2957 Turbo codes and decoding
• CPC Class Codes: H04L 1/0051 Stopping criteria
• CPC Class Codes: H04L 1/06 using space diversity
• CPC Class Codes: H04L 1/1829 Arrangements specially adapted for the receiver end

Abstract

A wireless communication terminal having a plurality of antennas with a variable relative distance includes a decoder for iterative decoding of reception signals including an error-correcting code received by the plurality of antennas) and a control unit for controlling an iteration count of decoding by the decoder in accordance with a distance between the antennas detected by an antenna distance detection unit for detecting the distance between the plurality of antennas.

Claims

1. A wireless communication terminal having a plurality of antennas with a variable relative distance comprising:

a decoder for iterative decoding of reception signals including an error-correcting code received by the plurality of antennas;

an antenna distance detection unit for detecting a distance between the plurality of antennas; and

a control unit for controlling an iteration count of decoding by the decoder in accordance with the distance between the antennas detected.

2. The wireless communication terminal according to claim 1, wherein the control unit, if the distance between the antennas is over a predetermined value, reduces the iteration count of decoding in comparison with an iteration count of decoding when the distance between the antennas is under the predetermined value.

3. The wireless communication terminal according to claim 1, further comprising a channel quality calculation unit for calculating quality of a communication channel from the reception signals received by the plurality of antennas, wherein

the control unit, if the distance between the antennas is under a predetermined value, controls the iteration count of decoding in accordance with the quality of the communication channel calculated by the channel quality calculation unit.

4. The wireless communication terminal according to claim 1, further comprising a determination unit for determining whether data decoded by the decoder has an error, and

a retransmission request unit for requesting retransmission of data based on a result of determination by the determination unit, wherein

the control unit further controls the iteration count of decoding by the decoder in accordance with the number of retransmission requests requested by the retransmission request unit.

5. The wireless communication terminal according to claim 1, further comprising a detection unit for detecting a remaining power level available to supply to the wireless communication terminal, wherein

the control unit, if the remaining power level detected by the detection unit is under a predetermined value, controls the iteration count of decoding by the decoder in accordance with the distance between the antennas detected by the antenna distance detection unit.

6. The wireless communication terminal according to claim 5, further comprising a channel quality calculation unit for calculating quality of a communication channel from the reception signals received by the plurality of antennas, wherein

the control unit, based on the remaining power level detected by the detection unit, switches between control of the iteration count of decoding in accordance with the quality of the communication channel calculated by the channel quality calculation unit and control of the iteration count of decoding in accordance with the distance between the antennas detected by the antenna distance detection unit.

7. A wireless communication terminal having a decoder for iterative decoding of a reception signal including an error-correcting code comprising:

a detection unit for detecting a remaining power level available to supply to the wireless communication terminal; and

a control unit for controlling an iteration count of decoding by the decoder in accordance with the remaining power level detected.

8. A communication control method of a wireless communication terminal having a plurality of antennas with a variable relative distance comprising the steps of:

iteratively decoding reception signals including an error-correcting code received by the plurality of antennas;

detecting a distance between the plurality of antennas; and

controlling an iteration count of decoding by the decoder in accordance with the distance between the antennas detected at the step of detection.

9. A communication control method of a wireless communication terminal having a decoder for iterative decoding of a reception signal including an error-correcting code comprising the steps of:

detecting a remaining power level available to supply to the wireless communication terminal; and

controlling an iteration count of decoding by the decoder in accordance with the remaining power level detected at the step of detection.