Realtek Semiconductor Inc.

Mediatek Corporation

Mediatek Singapore Pte. Ltd.

Ching-Chia Cheng

Yuan-Shuo Chang

Yu-Hsien Chang

Shih-Chieh Yen

Li-Chun Ko

Shun-Yong Huang

Hung-Tao Hsieh

Tsung-Ming Chen

Ying-Che Hung

Hsuan-Yu Liu

Chiyuan Lu

Shuo-Jen Hsu

I-Cheng Tsai

Po-Jung Chiu

Toru Matsuura

Wen-Hsien Chiu

Wei-Ping Chuang

Yi-Chu Chen

Wei-Kai Hong

Yu-Ming Lai

Hsin-Yi Lee

The present invention provides an electronic device including a first antenna, a second antenna and a wireless communication chip. The wireless communication chip is configured to control the first antenna to broadcast a packet, control the second antenna to receive the packet broadcasted from the first antenna, and determine channel state information according to the packet received by the second antenna.

Channel state information measurement method and associated wireless communication chip and electronic device

A calibration apparatus is used for calibrating characteristics of a power amplifier (PA) in a transmitter. The calibration apparatus includes an adaptive bias generator circuit that is used to track an envelope of an input signal received by control terminals of transistors of the PA and generate an adaptive bias voltage to the control terminals of the input transistors in response to the envelope of the input signal.

Apparatus and method for calibrating characteristics of power amplifier in transmitter

A method for compensating for degradation of a signal during transmission of the signal includes: performing thermal detection and accordingly generate a thermal detection result indicative of a temperature of a signal processing circuit; and performing property adjustment to adjust a predetermined property of the signal according to the thermal detection result. The property adjustment is performed on the signal according to the thermal detection result associated with previously transmitted signal. After performing the property adjustment, a characteristic value of the signal reaches a preset level.

Method for compensating for degradation of signal during transmission of the signal and transmitter utilizing the same

A wireless communication apparatus includes a channel estimation circuit, a beamforming control circuit, and a transmit (TX) circuit. The channel estimation circuit estimates a channel between the wireless communication apparatus and another wireless communication apparatus during at least one first time slot. The beamforming control circuit determines beamforming coefficients according to the estimated channel. The TX circuit applies the beamforming coefficients to transmission of an output data during at least one second time slot later than the at least one first time slot. During the at least one second time slot, the output data is transmitted to another wireless communication apparatus via multiple antennae. The wireless communication apparatus performs communications according to a normal frequency hopping sequence in compliance with a communication specification.

Wireless communication apparatus for performing beamforming under frequency hopping and associated wireless communication method

A data unit processing method performed by a first communication device, comprising: configuring a data unit by the first communication device, the data unit comprising: a specific format preamble following a first packet format; and a symbol part, comprising at least one symbol and following a Wi-Fi long range packet format. The specific format preamble can be decoded according to a first communication standard and the symbol can be decoded according to a Wi-Fi long range mode. The symbol part can be identified according to the specific format preamble. A method can decode the above-mentioned data unit and a communication device can perform the methods are also disclosed.

Data unit processing method and communication device applying the data unit processing method

A method for calibrating mismatches of an in-phase signal path and a quadrature signal path of a receiver is proposed in the present invention, including: utilizing the receiver to receive at least one test signal with a specific frequency via the first signal path and the second signal path, to generate a first signal path received signal and a second signal path received signal; performing frequency analysis upon the first signal path received signal and the second signal path received signal respectively, to generate a first frequency analysis result and a second frequency analysis result; and calculating at least one calibration coefficient according to the first frequency analysis result and the second frequency analysis result. A method for calibrating mismatches of an in-phase signal path and a quadrature signal path of a transmitter is also proposed in the present invention.

Calibration method and calibration apparatus for calibrating mismatch between first signal path and second signal path of transmitter/receiver

A method for calibrating mismatches of an in-phase signal path and a quadrature signal path of a transmitter, including: utilizing the receiver to receive at least a test signal via the first signal path and the second signal path, wherein each test signal possesses a specific frequency within a specific frequency band; calculating at least a calibration coefficient for each test signal respectively, so as to calibrate mismatch between the first signal path and the second signal path of the receiver with respect to the specific frequency corresponding to each test signal; deriving a tap coefficient of a calibration filter of a calibration filter unit according to the at least a calibration coefficient of each test signal; and utilizing the calibration filter unit to calibrate a received signal.

Wideband calibration method and wideband calibration apparatus for calibrating mismatch between first signal path and second signal path of transmitter/receiver

This disclosure provides a method for equalizing the transmission spectrum of a wireless communication transmitter. The method includes: providing a plurality of single-frequency signals; respectively inputting the plurality of single-frequency signals into the transmitter, wherein each single-frequency signal has a predetermined frequency and all the predetermined frequencies are different from each other; loopbacking the plurality of single-frequency signals to an analog to digital converter so as to generate a plurality of digital loopback signals; calculating a frequency response of the transmitter at base band circuit according to the plurality of digital loopback signals; and equalizing the transmission spectrum of the transmitter according to the frequency response of the transmitter.

Method for equalizing transmission spectrum of a wireless communication transmitter

A method for calibrating mismatches of an in-phase signal path and a quadrature signal path of a transmitter, including: additionally configuration at least one mixer calibration coefficient at a transmitting part of the transmitter; obtaining at least one mixer testing signal from the transmitting part via loopback for spectrum analysis to derive at least one mixer spectrum analysis result; adjusting the mixer calibration coefficient of the transmitting part according to the mixer spectrum analysis result; and additionally utilizing an in-phase signal path finite impulse response filter and a quadrature signal path finite impulse response filter to calibrate mismatches between a low pass filter of the in-phase signal path of the transmitting part of the transmitter and a low pass filter of the quadrature signal path of the transmitting part of the transmitter. A similar mismatch calibration operation may be applied to a receiver.

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Hsinchu, Taiwan

Ching-Chia Cheng