14results about "Echo effect reduction" patented technology

Techniques for echo cancellation in an RFID reader include incorporating an auxiliary error power amplifier (auxiliary PA) into the RFID reader, and dynamically adjusting a bias setting of the auxiliary PA based on a power level of a reflection of a signal transmitted by the RFID reader (“echo signal”) as measured at the RFID reader. When the measured echo signal power level is high, techniques herein set the auxiliary PA bias setting to a higher level to allow the auxiliary PA to account for the stronger echo signal. Inversely, when the measured echo signal power is low, techniques herein set the auxiliary PA bias setting to a lower level to reduce power consumption while the enabling the RFID reader to cancel echo phenomena and reliably detect signal responses from RFID tags in an environment.

The disclosure relates to a method and device for detecting at least one target, comprising: transmitting a sensing signal; obtaining a first channel estimation result corresponding to an echo signal of the sensing signal; obtaining a second channel estimation result based on the first channel estimation result; based on the first channel estimation result and the second channel estimation result, performing over-threshold detection based on a threshold value being used to obtain an index subset related to target(s); and obtaining an over-threshold detection result based on the index subset related to the target(s).

The invention discloses a broadband signal processing system and method in a solar radio observation system. The system comprises an antenna and tracking subsystem, an analog receiving subsystem and a digital receiving subsystem, the antenna and tracking subsystem is used for tracking the sun, receiving radio signals of a set continuous frequency band and outputting the received radio signals to the analog receiving subsystem; the analog receiving subsystem is used for carrying out broadband signal processing on the radio signals and outputting two groups of channel signals, and in each time period, the channel signals with the same original frequency band of the radio signals in the two groups of channel signals are selected and output to the digital receiving subsystem; and the digital receiving subsystem is used for carrying out digital processing on the channel signals output by the analog receiving subsystem. According to the invention, high-precision acquisition, long-distance reliable transmission and real-time processing of high-frequency signals can be realized in broadband solar radio observation of a set continuous frequency band.

This invention belongs to the field of ultrasonic wireless communication technology through metal media, specifically a Resonant Linear Echo Cancellation (RLS) system based on an FPGA parallel architecture. The system includes a communication transmitter, a metal channel, and a communication receiver. The transmitter includes a digital modulation module, a DAC conversion circuit, a bandpass filter circuit, a signal amplification circuit, a voltage follower circuit, and an ultrasonic transducer. The receiver includes an ultrasonic transducer, a front-end signal conditioning circuit, an ADC conversion circuit, and an FPGA digital signal processing unit. The data to be transmitted is converted into ultrasonic waves by the transmitter and enters the metal channel. After propagation, it enters the receiver, where the FPGA digital signal processing unit performs echo cancellation and demodulation to recover the data. This system utilizes the parallel computing advantages of the FPGA to implement the RLS algorithm in hardware, achieving stable and reliable ultrasonic communication through a metal wall in a sealed metal cavity environment.

An electronic device is provided. The electronic device may comprise a microphone, a speaker, a communication circuit, and at least one processor. The at least one processor can be configured to: acquire a second signal on the basis of decoding a first signal received from an external electronic device through the communication circuit; output an acquired third signal through the speaker on the basis of decompressing the second signal; compensate the second signal on the basis of the difference, between the second signal and the third signal, indicating distortion of the third signal, in response to acquiring, through the microphone, an input signal including the output third signal; and cancel an echo of the input signal on the basis of the compensated second signal.

A multiple-input multiple-output (MIMO) antenna configuration includes a transmit hybrid circuit connected to receive a first transmit signal and a second transmit signal, output a sum of the first transmit and second transmit signals, and output a difference between the first transmit and second transmit signals; a first antenna connected to receive the sum output; a second antenna connected to receive the difference output; a receive hybrid circuit connected to receive signals from the first and second antennas, output a sum of the signals from the first and second antennas, and output a difference between the first antenna signal and the second antenna signal; a first cancellation circuit connected to receive the first transmit signal and configured to compensate for interference due to the first transmit path; and a second cancellation circuit connected to receive the second transmit signal and configured to compensate for interference due to the second transmit path, wherein the sum output of the receive hybrid circuit and the output of the first cancellation circuit are combined to generate a first receive signal, and the difference output of the receive hybrid circuit and the output of the second cancellation circuit are combined to generate a second receive signal.

Techniques for echo cancellation in an RFID reader include incorporating an auxiliary error power amplifier (auxiliary PA) into the RFID reader, and dynamically adjusting a bias setting of the auxiliary PA based on a power level of a reflection of a signal transmitted by the RFID reader (“echo signal”) as measured at the RFID reader. When the measured echo signal power level is high, techniques herein set the auxiliary PA bias setting to a higher level to allow the auxiliary PA to account for the stronger echo signal. Inversely, when the measured echo signal power is low, techniques herein set the auxiliary PA bias setting to a lower level to reduce power consumption while the enabling the RFID reader to cancel echo phenomena and reliably detect signal responses from RFID tags in an environment.

A method and system eliminate echoes in the reproduction of radio signals transmitted via a radio channel. A radio signal transmitted by a transmitter is received by at least a first base station as a first audio signal and by at least a second base station as a second audio signal. The received audio signals are transmitted via an IP network to a control station for reproduction. The first and second audio signals arrive in the control station at different times or with a time shift and undergo a similarity analysis before their reproduction in the control station in order to reproduce the radio signal contained in both audio signals without echo if a similarity is established between the first audio signal and the second audio signal.

The invention discloses a linear frequency modulation signal parameter design method and system for a static body target, and relates to the field of body target signal processing, and the method comprises the steps: constructing a body target model, and obtaining a scattering time domain echo of the body target model; determining a reference range of a linear frequency modulation signal bandwidth parameter according to the distance between adjacent echo structures in the scattering time domain echo; after the scattering time domain echoes are subjected to matched filtering processing, the maximum value of echo data is selected as a fitness function, optimization iteration is carried out on linear frequency modulation signal bandwidth parameters in combination with an optimization algorithm until iteration is ended, the optimal linear frequency modulation signal bandwidth parameters are obtained, and the linear frequency modulation signals can obtain better gains with smaller bandwidth.

The utility model provides a quick release type antenna signal transmission module. The quick-release antenna signal transmission module comprises a first antenna signal transmission structure and a second antenna signal transmission structure. The first antenna signal transmission structure comprises a first quick-release structure matching shell and a first quick-release signal transmission assembly which is partially wrapped by the first quick-release structure matching shell. The second antenna signal transmission structure comprises a second quick-release structure matching shell and a second quick-release signal transmission assembly which is partially wrapped by the second quick-release structure matching shell. Therefore, when the first quick-release structure matching shell is configured to be fixed on a shell of an electronic product, the second quick-release structure matching shell is configured to be detachably connected to the first quick-release structure matching shell, and the second quick-release signal transmission assembly is configured to be detachably connected to the first quick-release signal transmission assembly.

The disclosure relates to a method and device for detecting at least one target, comprising: transmitting a sensing signal; obtaining a first channel estimation result corresponding to an echo signal of the sensing signal; obtaining a second channel estimation result based on the first channel estimation result; based on the first channel estimation result and the second channel estimation result, performing over-threshold detection based on a threshold value being used to obtain an index subset related to target(s); and obtaining an over-threshold detection result based on the index subset related to the target(s).

A configuration for configuring a first wireless device to detect clutter echoes to improve the configuration for a SIM. The device receives a SIM configuration having one or more parameters dedicated to clutter echo detection. The device performs SIM for clutter echo detection based on the SIM configuration. The device reports one or more beams having the maximum self-interference RSRP due to clutter echoes.

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Disclosed is a method performed by a first node in a wireless communication system including performing channel estimation on an echo signal of a first signal transmitted by the first node, determining a first filter based on a result of the channel estimation and a distance between the first node and a target, and performing a first filtering process on the result of channel estimation based on the first filter.

Techniques for echo cancellation in an RFID reader include incorporating an auxiliary error power amplifier (auxiliary PA) into the RFID reader, and dynamically adjusting a bias setting of the auxiliary PA based on a power level of a reflection of a signal transmitted by the RFID reader ("echo signal") as measured at the RFID reader. When the measured echo signal power level is high, techniques herein set the auxiliary PA bias setting to a higher level to allow the auxiliary PA to account for the stronger echo signal. Inversely, when the measured echo signal power is low, techniques herein set the auxiliary PA bias setting to a lower level to reduce power consumption while the enabling the RFID reader to cancel echo phenomena and reliably detect signal responses from RFID tags in an environment.