Shanghai Eastsoft Microelectronics Co., Ltd.

Qingdao Eastsoft Communication Technology Co., Ltd.

Shanghai Haier Integrated Circuit Co., Ltd.

Guangsheng Chen

Song Pan

Liwei Shen

Rui Wang

Jian Cui

Yajun Hu

A method and device for estimating a carrier frequency offset, and a computer-readable storage medium are provided. The method includes: determining a target area where a phase discrimination signal is located, wherein the target area is one of N numbers of candidate areas, the N numbers of candidate areas correspond to different value ranges, an union range of the N numbers of candidate areas is [&#x3c0;, &#x2212;&#x3c0;], and N&#x2265;2; determining a first estimation value of a direct current component corresponding to the phase discrimination signal based on the target area; and performing a carrier frequency offset compensation on the phase discrimination signal based on the first estimation value of the direct current component.

Method and device for estimating carrier frequency offset, and computer readable storage medium

Provided are a sub-carrier estimation method in a multi-carrier communication system and an apparatus. The method includes: receiving a data frame transmitted by a transmitting end, and extracting a training sequence from the data frame; performing fast Fourier transform operation on the training sequence and a preset reference sequence, respectively, to obtain frequency domain data of the training sequence and frequency domain data of the reference sequence, and conjugately multiplying the two kinds of frequency domain data; extracting real part of conjugate multiplication result; averaging values in each column of an M&#xd7;N array, respectively, to obtain an output array of 1 row and N columns; and estimating, according to the value in each column of the output array of 1 row and N columns, whether valid data is transmitted over N sub-carriers corresponding to the output array of 1 row and N columns.

Sub-carrier estimation method and apparatus in multi-carrier communication system

A receiving circuit, a transmitting circuit, a micro-controller, and a method for power line carrier communication. The receiving circuit includes: an analog amplifier, a receiving filter, an analog-to-digital converter, a digital mixer, a digital filter, and a digital demodulator connected successively. The transmitting circuit includes: a digital modulator, a gain controller, a digital-to-analog converter, a transmitting filter, and a transmitting amplifier connected successively. The micro-controller includes a central processor and the receiving circuit or the transmitting circuit. The method for power line carrier communication can be implemented based on the receiving circuit or the micro-controller. The receiving circuit, the transmitting circuit, the micro-controller, and the method for power line carrier communication provided by present invention solve the defect of supporting only one modulation or demodulation mode in a conventional power line carrier communication system, and can process a power line carrier signal in different modulation or demodulation modes.

Receiving circuit, transmitting circuit, micro-controller and method for power line carrier communication

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Shanghai, China

Guangsheng Chen