Huawei Technologies Co., Limited

Huawei Device Co., Ltd.

Fengyu Sun

Meng Hua

Gengshi Wu

Chunling Zhang

Shurong Jiao

Haodong Liu

Wei Mei

A noise reduction operation control method for a headset and an audio processor in a terminal device, where a pin of a universal serial bus (USB) Type-C interface is multiplexed. During implementation of the solutions in this application, a switch circuit corresponding to the pin of the USB Type-C interface is switched to ensure that a normal function of the pin of the USB Type-C interface is not affected. In addition, a digital microphone (DMIC) processor in a terminal device and a noise reduction microphone in a headset are coupled using the pin of the USB Type-C interface such that a noise reduction signal from the noise reduction microphone in the headset is received using the DMIC processor in the terminal device, thereby implementing noise reduction processing for the headset using the terminal device.

Noise reduction operation control method for headset and audio processor in terminal device

The present invention provides a method for estimating a ratio of average chip energy to a total transmit power spectrum density (Ec/Ior), including: according to a group of spreading codes corresponding to an acquired spreading factor, obtaining an estimated value of Ior; according to a spreading code of a physical channel to be estimated, obtaining an estimated value of Ec; and according to the estimated value of the Ior and the estimated value of the Ec, obtaining an estimated value of EC/Ior. The present invention further provides a device for estimating Ec/Ior. By adopting the method and device for estimating Ec/Ior, when a base station adjusts transmit power of each physical channel, an adjusted value of Ec/Ior can be obtained in real time for accurate estimation.

Method and device for estimating ratio of average chip energy to total transmit power spectrum density

A method and a device for determining a smooth window length in channel estimation is provided. The method includes: obtaining autocorrelation values of pilot signals, where the autocorrelation values include first autocorrelation values and second autocorrelation values, at least two first autocorrelation values exist, and at least one second autocorrelation value exists; determining a speed range according to symbols of the first autocorrelation values or the symbols of the first autocorrelation values and a ratio value between the second autocorrelation value and one of the first autocorrelation values; and determining the smooth window length according to the speed range. Through the method provided in embodiments of the present invention, the problems caused by a fixed smooth window length may be avoided, and this improves system performance.

Method and device for determining smooth window length in channel estimation

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Shanghai, China

Fengyu Sun