9 results about "Adaptive equalizer" patented technology

The invention provides an adaptive equalizer circuit and an operation method thereof. The adaptive equalizer circuit includes an amplifier circuit and an adaptive circuit. The amplifier circuit is coupled to the adaptive circuit. The amplifier circuit receives an input signal. The amplifier circuit provides a compensation signal to the adaptive circuit based on an input signal. The adaptability circuit provides a compensation setpoint and a feedback signal to the amplifier circuit based on the compensation signal. A low-frequency response and a high-frequency gain of the amplifier circuit are adjusted based on the feedback signal and the compensation setpoint, respectively.

The application provides a double-loop adaptive equalizer circuit based on power comparison, which comprises an equalizer, an input end of the equalizer being connected with a differential data stream; an adjusting circuit, an input end of the adjusting circuit being electrically connected with an output end of the equalizer; a high-frequency adaptive loop, which is used for detecting high-frequency power and low-frequency power of an output signal of the equalizer; a low-frequency adaptive loop, which is used for detecting high-frequency power and low-frequency power of an output signal of the adjusting circuit; the high-frequency adaptive loop and the low-frequency adaptive loop respectively generate high-frequency control signals and low-frequency control signals by comparing the high-frequency power and the low-frequency power of the output signals of the equalizer and the adjusting circuit, so as to adjust the high-frequency power and / or the low-frequency power of one or two signals, and make the high-frequency power and the low-frequency power of the two signals tend to be the same respectively. The equalizer has strong adaptive equalization capability and is not easily affected by external factors.

The present application belongs to the field of equalizer compensation, especially an adaptive equalizer compensation method for vehicle audio, aiming at the problem that the existing method is not convenient for effectively adaptive gain compensation of the noise generated during vehicle driving, thereby affecting the listening effect of the people in the vehicle, the present application proposes the following scheme, which comprises the following steps: S1: preparing a compensation system, the compensation system comprises a noise monitoring module and a multimedia audio acquisition module, the noise monitoring module is connected with a noise acquisition module, the noise acquisition module is connected with a spectrum analysis module, the spectrum analysis module is connected with a model establishment module, the model establishment module is connected with a database module, and the multimedia audio acquisition module is connected with a loudness monitoring module, the present application can effectively adaptive gain compensation of the noise generated during vehicle driving in the use process, thereby effectively guaranteeing the listening effect of the people in the vehicle.

This invention relates to the field of KVM switching control and intelligent video transmission, specifically to a seamless switching control system and method for KVM switches based on reinforcement learning. The system includes: collecting physical layer state data of the current data link and the target data link, including cable impedance attenuation values, bit error rate before adaptive equalizer compensation, historical timing data readout time, estimated environmental signal-to-noise ratio, and terminal configuration mode; inputting the physical layer state data into a reinforcement learning decision engine based on a deep Q-network, outputting link compensation parameters and pre-loaded timing parameters; performing a virtual handshake operation based on the pre-loaded timing parameters to generate a source-end link hold state; completing the reconstruction of underlying physical layer parameters and cross-matrix switching in the vertical blank area of ​​the video stream, and updating the model reward value based on the retrained state of the switched link; this invention achieves adaptive seamless switching control for high-speed video links such as display ports.

A receiver (20) includes an adaptive equalizer (24), a processor (36) and a decoder (32). The adaptive equalizer is configured to equalize a signal. The processor is configured to estimate a gain correction, which compensates for attenuation of the equalized signal by the equalizer due to noise present in the signal. The decoder is configured to decode the equalized signal. At least one of (i) equalization of the signal by the adaptive equalizer and (ii) decoding of the equalized signal by the decoder, is based on the gain correction.

This invention discloses a low-complexity symbol synchronization method and system. The method includes: S1, preprocessing the received signal; S2, inputting the preprocessed signal to the adaptive equalizer of the adaptive equalization module for equalization processing. The adaptive equalizer equalizes the signal by updating the tap weights. In the steady-state phase, its tap weight distribution tracks the fractional delay changes caused by SFO (Segmented Time Delay); S3, monitoring the amplitude changes of each tap weight in the adaptive equalization module in real time and recording the position of the tap with the maximum weight; S4, when the offset of the position of the tap with the maximum weight relative to a preset position exceeds a preset threshold, it is determined that the symbol timing has generated cumulative symbol timing drift, triggering the symbol synchronization operation; S5, executing and completing symbol synchronization. Its advantages are: this method reuses an existing adaptive equalizer, using its weight distribution as a direct observation of the synchronization state, significantly reducing FPGA resource consumption.

The invention relates to the technical field of high-speed communication and signal processing, and discloses a self-adaptive equalizer signal compensation method and system for a high-speed serial interface, and the method comprises the steps: obtaining the real-time sampling data of the interface, determining an equalization coefficient through dynamic self-adaptive filtering, and extracting the features of a monitoring signal; calculating environmental interference intensity according to the characteristics, and if the environmental interference intensity exceeds the standard, triggering genetic evolution to obtain optimized parameters; constructing a constraint matrix to correct parameter deviation, generating balance configuration and mapping the balance configuration to a virtual link for stability simulation; if simulation jitter exceeds the standard, historical non-convergent individuals are called for backtracking and re-optimization; real-time error iteration and smoothing processing are carried out based on the environment reference, and a final compensation strategy is determined; and finally, driving a physical link to construct a verification digital eye pattern and counting error codes to obtain communication quality data. The method can solve the problem of low signal compensation precision in the prior art.

An adaptive equalizer includes an updating unit that updates a step size of a vector of a tap coefficient used for controlling an adaptive filter based on a time-series update vector in accordance with a time-series input and output of the adaptive filter that tracks a polarization state of an optical signal received by a coherent optical receiver. The updating unit updates the step size based on a DC gain of the update vector. The updating unit may update the step size for each update vector component based on a DC gain for each update vector component.

An adaptive equalizer circuit and an operation method thereof are provided. The adaptive equalizer circuit includes an amplifier circuit and an adaptive circuit. The amplifier circuit is coupled to the adaptive circuit. The amplifier circuit receives an input signal. The amplifier circuit provides a compensation signal to the adaptive circuit based on the input signal. The adaptive circuit provides a compensation setting value and a feedback signal to the amplifier circuit based on the compensation signal. A low-frequency response and a high-frequency gain of the amplifier circuit are adjusted based on the compensation setting value and the feedback signal respectively.