| Patent application number | Description | Published |
|---|
| 20080238741 | SEMICONDUCTOR INTEGRATED CIRCUIT CAPABLE OF SCREENING CONFORMING DIGITAL-ANALOG CONVERTERS AND ANALOG-DIGITAL CONVERTERS TO BE MOUNTED BY AUTO-CORRELATION ARITHMETIC OPERATION - A semiconductor integrated circuit includes a test signal generating section which generates a test signal at the time of a test, a digital-analog converter which converts the test signal into an analog signal, an analog-digital converter which fetches a signal output from the digital-analog converter and converts the fetched signal into a digital signal, and an operating section which performs an auto-correlation arithmetic operation of a signal output from the analog-digital converter. The semiconductor integrated circuit further includes an evaluating section which evaluates presence/absence of distortion of the digital-analog converter and the analog-digital converter based on consistency of an auto-correlation arithmetic operation result in the operating section and a predetermined reference signal. | 10-02-2008 |
| 20080301524 | DECODER DEVICE AND METHOD FOR DECODING DATA STORED IN STORAGE MEDIUM - A decoder device includes: a decoder that decodes data stored in a storage medium by performing error correction on the data, the error correction being capable of correcting code error and code erasure included in the data; a memory that stores a history of an address in the storage medium of a code included in the data, the code being detected to have the code error by the decoding unit; and a controller that controls the decoder to change a detail of the error correction based on the history stored in the memory. | 12-04-2008 |
| 20090061780 | WIRELESS COMMUNICATION DEVICE AND SIGNAL DETECTION CIRCUIT - A wireless communication device includes: a wireless communication unit that is configured to: perform a wireless communication in a first mode using a first frequency band serving as a first communication channel; and perform the wireless communication in a second mode using a second frequency band including the first communication channel and a second communication channel that is adjacent to the first communication channel; a detection unit that is configured to: monitor each of the first frequency band and the second frequency band; output a first detection signal when an interference signal is detected in the first frequency band; and output a second detection signal when the interference signal is detected in the second frequency band; and a determination unit that determines whether the interference signal is in the first communication channel or in the second communication channel based on the first and second detection signals. | 03-05-2009 |
| 20090245125 | WIRELESS COMMUNICATION SYSTEM FOR REDUCING POWER CONSUMPTION WHEN RECEIVING A FRAME HAVING A LOW RECEPTION SUCCESS POSSIBILITY - A header analysis unit reads a parameter showing a format of a digital signal contained in a received signal. A received signal quality measurement unit measures a quality of the received signal. An awake/sleep control unit controls restart and sleep of a reception unit based on data from the header analysis unit and the received signal quality measurement unit. The awake/sleep control unit stops a reception operation for a period corresponding to a frame length when the quality of the leading portion of the received signal is less than a predetermined threshold. | 10-01-2009 |
| 20100020711 | COMMUNICATION DEVICE COMPRISING A CARRIER SENSE FUNCTION AND COMMUNICATION METHOD - A communication device of an example of the present invention comprises a first unit determining that whether a state is a first state indicating that a transmission medium is in use, a second state indicating that the transmission medium is not in use, or a third state indicating that whether or not the transmission medium is in use is being determined, and a second unit prohibiting a data transmission in the first and third states, and permitting the data transmission in the second state. | 01-28-2010 |
| 20100034182 | WIRELESS COMMUNICATION APPARATUS AND METHOD - When a wireless communication apparatus transmits a data frame requesting an ACK frame, it is expected that a receiver station will transmit the ACK frame. A preamble analyzer analyzes whether or not a preamble pattern added to the header of a received frame exists from the time it is expected that the ACK frame will be received. When a desired preamble pattern is detected, the preamble analyzer supplies instructions to start an operation of demodulating a reception signal to a demodulator via a controller. | 02-11-2010 |
| 20110068968 | RADAR DETECTION DEVICE USED IN WIRELESS COMMUNICATION DEVICE - A radar detection device of an example of the present invention includes a section which increments a value of a counter when a first difference value between a receiving power value in detecting an edge of a received signal of wireless communication and a receiving power value after a first time elapses since the edge detection is more than a first threshold, and a section which determines whether a second difference value between the value of the counter and a value of the counter before a third time is not lower than a second threshold in each of passage of a second time, and determines that radar is detected when the second difference value is not lower than the second threshold. | 03-24-2011 |
