Abstract: There are included: a device to be located (500) that transmits sound waves; a positioning device (100) that transmits sound waves to the device to be located (500) upon receiving the sound waves transmitted from the device to be located (500); and a positioning execution device (300) that calculates a distance between the positioning device (100) and the device to be located (500) by using required time for the device to be located (500) to receive the sound waves transmitted by the positioning device (100) after transmitting the sound waves and return delay time before the positioning device (100) transmits the sound waves to the device to be located (500) after receiving the sound waves, and calculates a location of the device to be located (500) by using the distance between the positioning device (100) and the device to be located (500).

Abstract: A communication system includes a wireless IC tag and a reader/writer that performs reading and writing on the wireless IC tag via wireless communication. The reader/writer includes an error control encoder and an error control decoder. On writing data into the wireless IC tag, the reader/writer encodes the data by the error control encoder and writes real data separately from error-control-decodable data. On reading out data from the wireless IC tag, the reader/writer selects whether to read out only the real data or to read out data including error-control-decodable information to decode the data by the error control decoder based on error control information indicating whether to perform error control or not.

Abstract: A communication system includes a wireless IC tag and a reader/writer that performs reading and writing on the wireless IC tag via wireless communication. The reader/writer includes an error control encoder and an error control decoder. On writing data into the wireless IC tag, the reader/writer encodes the data by the error control encoder and writes real data separately from error-control-decodable data. On reading out data from the wireless IC tag, the reader/writer selects whether to read out only the real data or to read out data including error-control-decodable information to decode the data by the error control decoder based on error control information indicating whether to perform error control or not.

Abstract: In the timing correcting device, a RAKE path detecting circuit 1 detects a plurality of path candidates to be tracked, from a reception signal, and outputs a “timing of a path” and a “detection correlation value” corresponding to each path candidate, as a result of the detection. Next, each tracking-path candidate deciding circuit (2a, 2b, 2c, . . . ) generates a predetermined decision standard that is necessary for selecting an optimum path timing from timings of the path candidates, based on an individually allocated result of the detection. Further, the tracking-path selecting circuit 3 selects a timing of an optimum path to be tracked, based on the result of the detection and the predetermined decision standards. Then, a comparator circuit 5 compares a predetermined reception reference timing given from the outside with the optimum path timing, and calculates a phase difference between the two.

Abstract: A mobile station receives data from a plurality of sectors and selects sectors as candidates for site selection diversity transmit power control from the plurality of sectors. When the mobile station does not receive any data via dedicated physical data channels from selected sectors, the mobile station selects two or more sectors from sectors listed in a received sector selection candidate table.

Abstract: This invention is constituted to include units which executes a step 1 of establishing slot timing synchronization, a step 2 of establishing frame timing synchronization and specifying a scrambling code group, and a step 3 of specifying a scrambling code. The unit which executes the step 1 comprises a p-SCH detection section (2) which detects p-SCH having a specified number of paths, a maximum correlation detected path acquisition section (12) and a multi-path deletion section (13) which extract “n” paths having the higher correlation values from the detected paths (the number of fingers≦n<specified number of paths), and a step 2 allocation section (14) which allocates detection timings of s-SCH (Secondary-synchronization channel) corresponding to the n paths to the unit of executing the step 2.

Abstract: A radio communication apparatus capable of solving a problem involved in a conventional apparatus in that in addition to a first receiver, a second receiver must be provided for establishing synchronization with a contiguous base station, which causes an increase in a circuit scale and consumed power of a mobile station. The present radio communication apparatus switches, when carrying out handoff from the current base station to a contiguous base station, a receiving frequency of a receiver from the frequency of the current base station to that of the contiguous base station, and a counter to be corrected by a synchronization manager from a first counter to a second counter that is used to establish synchronization with the contiguous base station.