Signal sending apparatus, signal detection apparatus, signal sending and detection system, signal sending method, and signal detection method

A signal detection apparatus, comprising:

• a processor, configured to determine a time unit that is in each time window and that is for detecting a synchronization signal, wherein
• the determined time unit comprises at least one of:
• a jth time unit in each time window, a (j+(└m/S┘+1)·S−m)th time unit in each time window, or a (j+m)th time unit in each time window, S is a quantity of time units comprised in each time window, m is a positive integer that is greater than or equal to 1 and that is less than or equal to S, and j is a positive integer that is greater than or equal to 1 and that is less than or equal to S;
• and
• a transceiver, configured to detect the synchronization signal in the determined time unit in each time window.

A signal sending method, comprising:

• determining a time unit that is in each time window and that is used to transmit a synchronization signal, wherein
• the determined time unit comprises at least one of:
• a jth time unit in each time window, a (j+(└m/S┘+1)·S−m)th time unit in each time window, or a (j+m)th time unit in each time window, S is a quantity of time units comprised in each time window, m is a positive integer that is greater than or equal to 1 and that is less than or equal to S, and j is a positive integer that is greater than or equal to 1 and that is less than or equal to S;
• and
• transmitting the synchronization signal in the determined time unit in each time window.

A signal detection method, comprising:

• determining a time unit that is in each time window and that is for detecting a synchronization signal, wherein
• the determined time unit comprises at least one of:
• a jth time unit in each time window, a (j+(└m/S┘+1)·S−m)th time unit in each time window, or a (j+m)th time unit in each time window, S is a quantity of time units comprised in each time window, m is a positive integer that is greater than or equal to 1 and that is less than or equal to S, and j is a positive integer that is greater than or equal to 1 and that is less than or equal to S;
• and
• detecting the synchronization signal in the determined time unit in each time window.