Mediatek Corporation

Tzyuan Shiu

Shih-Chieh Yen

Chi-Yao Yu

Sheng-Che Tseng

Hsin-Hung Chen

Caiyi Wang

Po-Sen Tseng

Yu-Te Lin

I-No Liao

Wei-Kai Chang

A method for avoiding inter-modulation distortion in a communications apparatus capable of supporting carrier aggregation and communicating with a peer communications apparatus in a wireless network via at least a first CC and a second CC includes: determining a frequency adjustment value for adjusting a first oscillating frequency of a first local oscillation signal utilized for processing an RF signal of the first CC or a second oscillating frequency of a second LO signal utilized for processing an RF signal of the second CC when an RF signal or a baseband signal of the second CC is interfered with by an inter-modulation distortion signal contributed by any signal component related to the first CC; and adjusting the first oscillating frequency or the second oscillating frequency according to the frequency adjustment value.

Methods for avoiding inter-modulation distortion and communications apparatuses utilizing the same

According to at least one aspect, a communication system is provided. The communication system includes a power amplifier configured to amplify an input signal to generate an amplified output signal and provide the amplified output signal to an antenna, a power supply coupled to the power amplifier and configured to provide power to the power amplifier based on a power supply control signal, and a controller coupled to the power supply. The controller is configured to identify a target transmit power level for transmission of a wireless signal, generate the power supply control signal based on the target transmit power level using information indicative of a relationship between the target transmit power level and a setting of the power supply, generate performance information indicative of a characteristic of the communication system when the wireless signal is transmitted, and update the information indicative of the relationship using the performance information.

Adaptive power amplifier supply with pre-distortion mechanism

The present invention provides a method for calibrating a communication circuit. In an embodiment, the method may include: cooperating start of a calibration procedure, and, by the communication circuit, signaling a calibration signal between a test equipment and the communication circuit. The calibration signal may include a plurality of coexisting component signals respectively at a plurality of calibration frequencies. Associated communication circuit is also disclosed.

Communication circuit and associated method for calibrating communication circuit

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Taipei, Taiwan

Tzyuan Shiu