Synchronization circuit and synchronization method, wireless communication device and wireless communication method, and computer program

A synchronizing method comprising the steps of:

• coarse synchronizing to determine temporary reception timing using a preamble consisting of repetition of known training signals added to a reception packet;
• controlling synchronization candidate timing to set up multiple synchronization candidates on the basis of the temporary reception timing and controlling synchronization of received signal s in each of the multiple synchronization candidates;
• monitoring signal quality of the received signal s synchronized in each of the multiple synchronization candidates;
• and
• selecting one of the synchronization candidates as final reception timing on the basis of a monitoring result of the signal quality in the signal quality monitoring section.

A wireless communication device comprising:

• a reception section which receives a packet with a preamble consisting of repetitions of known training sequences added at the head;
• and
• a synchronizing circuit which includes:
• a coarse synchronizing circuit which determines temporary reception timing using a reception preamble;
• a synchronization candidate timing control section which sets up multiple synchronization candidates on the basis of the temporary reception timing and controls synchronization of received signal s in each of the multiple synchronization candidates;
• a signal quality monitoring section which monitors signal quality of the received signal s synchronized in each of the multiple synchronization candidates;
• and a synchronization candidate selecting section which selects one of the synchronization candidates as a final reception timing on the basis of a monitoring result of the signal quality in the signal quality monitoring section,
• wherein a reception process is conducted in which information signals reception after the preamble are synchronized at the final reception timing.

A wireless communication method comprising the steps of:

• receiving a packet with a preamble consisting of repetitions of known training sequences added at the head;
• synchronizing, which includes:
• determining temporary reception timing using a reception preamble;
• setting up multiple synchronization candidates on the basis of the temporary reception timing and controlling synchronization of received signal s in each of the multiple synchronization candidates;
• and monitoring signal quality of the received signal s synchronized in each of the multiple synchronization candidates;
• and selecting one of the synchronization candidates as a final reception timing on the basis of a monitoring result of the signal quality;
• and
• conducting a reception process in which information signals reception after the preamble is synchronized at the final reception timing.

A computer program written in a computer-readable format such that a process for timing reception of a packet is executed on a computer, the program causing the computer to function as:

• a coarse synchronizing circuit which determines temporary reception timing using a preamble consisting of repetitions of known training signals added to a reception packet;
• a synchronization candidate timing control section which sets up multiple synchronization candidates on the basis of the temporary reception timing and controls synchronization of received signal s in each of the multiple synchronization candidates;
• a signal quality monitoring section which monitors signal quality of the received signal s synchronized in each of the multiple synchronization candidates;
• and
• a synchronization candidate selecting section which selects one of the synchronization candidates as final reception timing on the basis of a monitoring result of the signal quality in the signal quality monitoring section.