RFI estimation device, signal processing device and signal processing method

Abstract

A Radio Frequency Interference (RFI) estimation device for generating an estimated RFI signal includes a combiner, a first multiplier and a second multiplier. The combiner is configured to combine a first digital signal and a second signal to generate the estimated RFI signal. The first multiplier is configured to generate the first digital signal according to an in-phase signal and a first cosine signal. The second multiplier is configured to generate the second digital signal according to a quadrature-phase signal and a first sine signal. The first cosine signal and the first sine signal are generated based on a frequency and the in-phase signal and the quadrature-phase signal are generated based on the frequency and one or more harmonics of the frequency.

Description

BACKGROUND OF THE INVENTION1. Field of the Invention[0001]The invention relates to a signal processing device in a communication device, more particular to a signal processing device capable of effectively eliminating radio frequency (RF) interference.2. Description of the Prior Art[0002]In almost any communication system, interference, externally or internally generated, causes errors in the transmission signals and limits the performance of the communication system. For example, noise in the transmission channel or errors in the components of the communication device may cause the voltage level of the transmission signal to deviate from the ideal voltage level (that is, the voltage level set by the transmitter). When the voltage deviation is too large, it will cause misjudgment at the receiver side and the communication performance degrades.[0003]In view of this, the communication devices are usually equipped with circuits or devices for eliminating unwanted interference. The inte...

AI Technical Summary

Benefits of technology

The invention provides a method and device for processing signals to eliminate radio frequency interference. This helps to improve the quality of the received signals and minimize errors. The method also helps to smoothly adjust the parameters of the interference eliminating circuit or device to minimize symbol errors during training.

Problems solved by technology

In almost any communication system, interference, externally or internally generated, causes errors in the transmission signals and limits the performance of the communication system.

For example, noise in the transmission channel or errors in the components of the communication device may cause the voltage level of the transmission signal to deviate from the ideal voltage level (that is, the voltage level set by the transmitter).

When the voltage deviation is too large, it will cause misjudgment at the receiver side and the communication performance degrades.

However, when the voltage deviation is too large, it will also cause errors in parameter adjustment, resulting in that the signal error cannot converge during the procedure of adaptive training or the adaptive adjustment.

However, the actual amount of error of this symbol is +1.6.

Therefore, the amount and the direction of the error determined by the receiver are both wrong.

If the receiver keeps using the wrong determinations to adjust the parameters of the interference eliminating circuit or device, the direction and the amount of parameter adjustment will all be wrong, making the signal error at the receiver cannot converge, which may eventually lead to serious consequences such as disconnection between the receiver and the transmitter.

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