Method and apparatus for obtaining time of arrival TOA when mobile terminal is located

An apparatus for obtaining time of arrival (TOA), comprising:

• a memory to store instructions;
• and
• a processor in communication with the memory to execute the instructions to configure the apparatus to:
• receive a locating reference signal sent by a locating transmitter;
• perform time domain related processing on the locating reference signal and a synchronization reference signal sequence to obtain a related spectrum value of a multipath signal component corresponding to a delay value;
• detect a channel parameter used when the locating reference signal is received, and generate, according to the channel parameter and a function that progressively decreases with the delay value, a related spectrum threshold that progressively decreases with the delay value;
• and
• receive the related spectrum value that is corresponding to the delay value and that is generated by the time domain related processing signal generation module and the related spectrum threshold that is corresponding to the delay value and that is generated by the apparatus, traverse the delay value in ascending order of the delay value, search for a first traversed delay value whose related spectrum value of a multipath signal component corresponding to the delay value is greater than the related spectrum threshold corresponding to the delay value, and use the found delay value as TOA for outputting.

A device for measuring time of arrival (TOA), comprising:

• a memory to store programs;
• and
• a processor configured to invoke the programs stored in the memory to perform the following operations:
• receiving a locating reference signal sent by a locating transmitter;
• performing time domain related processing on the locating reference signal and a synchronization reference signal sequence to obtain a related spectrum value of a multipath signal component corresponding to a delay value;
• detecting a channel parameter used when the locating reference signal is received, and generating, according to the channel parameter and a function that progressively decreases with the delay value, a related spectrum threshold that progressively decreases with the delay value;
• and
• traversing the delay value in ascending order of the delay value, searching for a first traversed delay value whose related spectrum value of a multipath signal component corresponding to the delay value is greater than the related spectrum threshold corresponding to the delay value, and using the found delay value as TOA for outputting.