Wireless base station device and path search method

A path search circuit of a wireless base station device that communicates with a mobile device via an advance base station, detects paths from the mobile device to the advance base station, and demodulates data from signals received via the paths, comprising:

• a reception timing determination portion that determines reception timing of data that is transmitted by a mobile device that exists in a cell of the advance base station on the basis of the distance between the wireless base station device and the advance base station and the cell radius of the advance base station;
• a data reception portion that receives data from the mobile device by performing a reception operation at the reception timing;
• a delay profile creation portion that creates a delay profile on the basis of the received data;
• and
• a path detection portion that detects paths from the mobile device on the basis of the delay profile.

A path search method of a wireless base station device that communicates with a mobile device via an advance base station, detects paths from the mobile device to the advance base station, and demodulates data from signals received via the paths, comprising the steps of:

• determining the reception timing of data that is transmitted by a mobile device that exists in a cell of the advance base station on the basis of the distance between the wireless base station device and the advance base station and the cell radius of the advance base station;
• receiving data from the mobile device by performing a reception operation at the reception timing;
• and
• creating a delay profile on the basis of the received data;
• detecting paths from the mobile device on the basis of the delay profile.