Abstract: The present invention provides a method for adjusting transmission power of a communication system having a first terminal and a second terminal. In accordance with a preferred embodiment, the method comprises steps of: (a) repeatedly transmitting a detecting packet from the first terminal to the second terminal by sequentially using one of a variety of transmission powers; (b) receiving a responding packet from the second terminal, wherein the responding packet corresponds to the one of the variety of transmission powers; and (c) choosing at least one from the variety of the transmission powers for transmitting at least a data packet to the second terminal therewith based on the responding packet from the second terminal.

Abstract: An antenna diversity system having a non-interrupt function is provided. The antenna diversity system includes: a plurality of antennas, a plurality of radio frequency (RF) circuits, and a signal processing unit. The RF circuits are respectively coupled to the antennas, wherein each RF circuit is utilized for operating in one of a plurality of channels. The signal processing unit is coupled to the RF circuits, and utilized for determining whether a signal quality value of at least one of the antennas lower than a threshold to generate a determining result, and determining whether to change the channel of at least one of the RF circuits according to the determining result, so as to make at least two of the RF circuits operating in a same channel of the channels.

Abstract: A multiple-antenna transceiver in the present invention includes a frame controller and circuitry for transmitting and receiving. The transmitting component includes a sequence selection circuit, a MIMO modulation and coding circuit, and numerous TX RFE and AFE circuits. The receiving component includes a MIMO demodulation and decoding circuit, a sequence separation circuit, and numerous RX RFE and AFE circuits. The frame controller can enable and disable the TX and RX RFE and AFE circuits individually so as to reduce power consumption of the whole system.

Abstract: A power adjusting apparatus communicating with a remote terminal is provided. The apparatus includes: a transceiving unit transmitting a plurality of test packets by a plurality of powers; a processing unit coupled to the transceiving unit, and deciding a transmission power for transmitting a subsequent packet according to at least one retransmission number of transmitting the test packets.

Abstract: An electronic device having network connection function includes a receiving unit and a control unit, where the electronic device and an access point support a plurality of connection modes. The receiving unit is utilized for receiving a signal from the access point. The control unit is utilized for selecting a specific connection mode from the plurality of connection modes according to a determination result generated by determining whether the signal satisfies a predetermined condition, and starting to connect to the access point by using the specific connection mode, where a data rate of the specific connection mode is not a highest data rate among that of the plurality of connection modes.

Abstract: A signal processing system is disclosed. The system includes: a first synthesizer and a second synthesizer, for respectively generating a first frequency and a second frequency; a first RF circuit; a first analog front end (AFE); a second RF circuit; and a second AFE, wherein the first RF circuit and the first AFE can support a signal transmission of a first bandwidth, the second RF circuit and the second AFE can support a signal transmission of a second bandwidth, a central frequency of the first bandwidth is substantially equal to the first frequency, and a central frequency of the second bandwidth is substantially equal to the second frequency.

Abstract: A signal transmission method includes: converting an input signal to generate a first converted signal having a first bandwidth, and a second converted signal having a second bandwidth; mixing the first converted signal with an oscillation signal to generate a first mixed signal, and mixing the second converted signal with the oscillation signal to generate a second mixed signal; and transmitting the first and second mixed signals by different antennas; wherein the input signal has a predetermined bandwidth, the first bandwidth is smaller than the predetermined bandwidth; and the second bandwidth is smaller than the predetermined bandwidth.

Abstract: A method for automatically tuning an analog filter includes the steps of making an analog filter filter an input signal to output a filtered signal according to a filtering characteristic, sampling the filtered signal to generate sampled data, computing a sector data number of the sampled data that does not complying with a specified data format, and tuning the filtering characteristic of the analog filter according to the sector data number.

Abstract: A multi-mode wireless transceiver and a multi-mode switching method thereof are disclosed to provide at least one wireless transceiving interface capable of dynamically switching between multiple frequency bands. The wireless transceiver comprises: a first RF transceiving circuit for transceiving RF signals of a first frequency band; a second RF transceiving circuit for transceiving RF signals of a second frequency band; a first frequency synthesizer and a second frequency synthesizer for generating a first carrier of the first frequency band and a second carrier of the second frequency band respectively; and a switching circuit for outputting the first carrier to the first RF transceiving circuit, and for determining to output one of the first and second carriers to the second RF transceiving circuit according to a control signal.

Abstract: A multiple-antenna transceiver in the present invention includes a frame controller and circuitry for transmitting and receiving. The transmitting component includes a sequence selection circuit, a MIMO modulation and coding circuit, and numerous TX RFE and AFE circuits. The receiving component includes a MIMO demodulation and decoding circuit, a sequence separation circuit, and numerous RX RFE and AFE circuits. The frame controller can enable and disable the TX and RX RFE and AFE circuits individually so as to reduce power consumption of the whole system.

Abstract: An antenna diversity system having a non-interrupt function is provided. The antenna diversity system includes: a plurality of antennas, a plurality of radio frequency (RF) circuits, and a signal processing unit. The RF circuits are respectively coupled to the antennas, wherein each RF circuit is utilized for operating in one of a plurality of channels. The signal processing unit is coupled to the RF circuits, and utilized for determining whether a signal quality value of at least one of the antennas lower than a threshold to generate a determining result, and determining whether to change the channel of at least one of the RF circuits according to the determining result, so as to make at least two of the RF circuits operating in a same channel of the channels.

Abstract: The present invention provides an antenna diversity apparatus and an antenna diversity method. The antenna diversity apparatus comprises: a plurality groups of antennas, a switching unit, a demodulating unit, an antenna switch selecting unit, and a control unit, wherein each group of the plurality groups of antennas comprises at least an antenna, and the control unit can comprises: a receiving signal quality detecting unit, a packet detecting unit, and an antenna decision unit. The antenna decision unit can be realized by hardware, firmware, or software, and the antenna switch selecting unit can be realized by hardware. The antenna diversity apparatus and the antenna diversity method provided by the present invention can switch antennas fast to avoid the defect of occurring burst error to reduce transmitting data rate, and switch to proper antennas fast when variation of the data transmission channels occurs.

Abstract: 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.

Abstract: A wireless communication device is disclosed. The wireless communication device includes a frequency hopping communication circuit, a power spectral density circuit and a control circuit. The frequency hopping communication circuit includes a channel map. The frequency hopping communication circuit selects one of channel in a channel map to connect to another frequency hopping communication circuit according to the channel map. The power spectral density circuit for generating a power spectral density signal by measuring spectrums on all channels connected to the frequency hopping communication circuit. The control circuit receives the power spectral density and output statistical distribution data to the frequency hopping communication circuit. The frequency hopping communication circuit updates the channel map according to the statistical distribution data.

Abstract: A multiple-antenna transceiver in the present invention includes a frame controller and circuitry for transmitting and receiving. The transmitting component includes a sequence selection circuit, a MIMO modulation and coding circuit, and numerous TX RFE and AFE circuits. The receiving component includes a MIMO demodulation and decoding circuit, a sequence separation circuit, and numerous RX RFE and AFE circuits. The frame controller can enable and disable the TX and RX RFE and AFE circuits individually so as to reduce power consumption of the whole system.

Abstract: A wireless communication system includes a receiving unit, a buffer unit, a determining unit, and an adjustment unit. The receiving unit receives a signal stream. The buffer unit is coupled to the receiving unit, for storing the signal stream by using a used depth. The determining unit is coupled to the receiving unit, for determining a signal receiving quality of the signal stream received from the receiving unit and accordingly generating a determining result. The adjustment unit is coupled to the determining unit and the buffer unit, for adjusting the used depth of the buffer unit according to the determining result.

Abstract: A signal receiving apparatus includes a frequency converting circuit, a computing circuit, and a control circuit. The frequency converting circuit is for converting a RF signal to respectively generate a first converted signal and a second converted signal according to a first converting frequency and a second converting frequency. The computing circuit is for computing signal quality parameters of the first converted signal and the second converted signal. The control circuit is for outputting a control signal according to the signal quality parameters of the first converted signal and the second converted signal, wherein the control signal corresponds to the converting frequency of the frequency converting circuit.

Abstract: 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.

Abstract: A channel assignment method includes the following steps: settling a beginning time point and a terminating time point for communicating with a target client operated in an active mode; and performing a channel reservation mechanism for the target client at a first time point, wherein the first time point is earlier than the beginning time point.

Abstract: A communication device may include a transmitting circuit for transmitting packets from a first communication device to a second communication device and a processor in the first communication device and coupled with the transmitting circuit. The processor may evaluate the packet receipt status information to identify a packet receipt characteristic associated with the second communication device and control data packet transmission from the first communication device to the second communication device based on the packet receipt characteristic associated with the second communication device.