Realtek Semiconductor Inc.

Chih-Hung Tsai

Kuang-Yu Yen

Chien-Yu Chen

Der-Zheng Liu

Shu-Hua Yang

Chih-Pao Lin

Ping-Cheng Chen

Chih-Yuan Chou

A wireless communication device and a dynamic anti-interference method for the same are provided. The device includes at least two wireless communication circuits. When the method operates in the wireless communication device, the device monitors activities of every wireless communication circuit through a clear channel assessment method for acquiring signal strength of every wireless communication circuit. The assessment allows the device to perform a corresponding anti-interference measure for each of the wireless communication circuits. For example, when the device acknowledges that a second wireless communication circuit of the device starts to work as a first wireless communication circuit transmits or receives signals, the device controls a receiver or a transmitter of the second wireless communication circuit to perform an anti-interference measure such as a gain control for a receiver or power adjustment for a transmitter.

Wireless communication device and dynamic anti-interference method for the same

An isolation estimation system includes a transmitter device, a first receiver device, a second receiver device, and a processor circuit. The transmitter device adopts a first communication technology. The transmitter device is configured to transmit a transmitting signal to the first receiving device. The second receiver device is configured to acquire a leakage signal power spectral density of a leakage signal corresponding to the transmitting signal. The second receiver device adopts a second communication technology. A bandwidth of the second communication technology is narrower than a bandwidth of the first communication technology, and the second communication technology supports a frequency hopping process. The processor circuit is configured to calculate isolation according to a signal-in-air power spectral density of the transmitting signal and the leakage signal power spectral density. The isolation is for determining whether to adjust the transmitter device.

Isolation estimation system, isolation estimation method, and processor circuit

A wireless communication device that includes an antenna module, a first communication circuit and a second communication circuit is provided. The first communication circuit performs communication by using a first communication protocol and transmits a test signal via the antenna module. The second communication circuit performs communication by using a second communication protocol and receives the test signal to calculate an isolation index based on an actual received power thereof. The second communication circuit determines that the antenna module includes two antennas when the isolation index is smaller than a threshold value to operate the first and the second communication circuits under a dual-antenna operation mode. The second communication circuit determines that the antenna module includes one antenna when the isolation index is not smaller than the threshold value to operate the first and the second communication circuits under a shared-antenna operation mode.

Wireless communication device and operation method of the same

The present invention discloses a Wireless Local Area Network (WLAN) and Bluetooth (BT) device including a WLAN circuit and a BT circuit. The WLAN circuit starts a WLAN slot according to a beacon of a beacon signal from an access point and executes WLAN communication. The WLAN slot ends after a measured reception time point of the beacon so as to prevent missing the beacon. The BT circuit starts a BT slot after the end of the WLAN slot and executes BT communication. If the BT slot is shorter than the period of the beacon signal minus the WLAN slot, the WLAN circuit earns additional time to start an extended WLAN slot after the end of the BT slot for carrying on the WLAN communication. The extended WLAN slot is not longer than the period of the beacon signal minus the sum of the WLAN and BT slots.

Wireless local area network and bluetooth device

A data transmitting system, comprising: a processor; a first transmitting interface; a first transmitting apparatus; a second transmitting interface; a second transmitting apparatus and a signal transmitting line. The processor enters a power down mode when the first transmitting apparatus does not output data. The first transmitting generates a data transmitting indication signal when the processor is operated in the power down mode and the first transmitting apparatus has data to be output. The second transmitting apparatus generates a recovery signal according to the data transmitting indication signal, and transmits the recovery signal to the processor via the second transmitting interface. Thereby the processor goes back to a normal mode to control the first transmitting apparatus to output data.

Data transmitting system and data transmitting method

A method of tuning a driving current of a data transmission interface includes: utilizing a driving current with a present current value to continuously send a test data to a receiving end; accumulating a number of times that the test data is sent to generate a transmission counting result; determining whether a transmission error occurs while the test data is sent to the receiving end and accumulating a number of times that the transmission error occurs to generate a transmission error counting result; and when the transmission counting result reaches a predetermined value, determining how to tune the present current value of the driving current according to the transmission error counting result.

Apparatus and method of controlling driving current of transmission

A receiver includes a plurality of antennas; a switching device coupled to the antennas for selecting one of the antennas to receive transmitted signals; a demodulator coupled to the switching device for demodulating the transmitted signals to generate demodulated signals; and a control circuit coupled to the demodulator and the switching device, for counting a specific type of packets within the demodulated signals so as to accordingly control the switching device.

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Kaohsiung, Taiwan

Chih-Hung Tsai