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Receiver IQ imbalance compensation method and device

A balance compensation and receiver technology, applied in electrical components, transmission systems, etc., can solve problems such as IQ imbalance, amplitude and phase mismatch, and reduce the bit error performance of the receiving system, so as to ensure accuracy and save resources.

Active Publication Date: 2021-06-18
上海擎昆信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in an actual communication system, due to physical limitations of circuit hardware and inevitable design errors in circuit design, there will be a mismatch between the amplitude and phase of the two signals, that is, IQ imbalance, which will greatly reduce the error of the receiving system. code performance
[0003] Existing schemes have adaptive compensation based on training sequences, which require a large number of training sequences and waste spectrum resources
[0004] Secondly, some solutions are based on statistical performance of data, but for the convenience of calculation, it is assumed that there is no imbalance in one of the channels, but in fact, both IQ channels are unbalanced

Method used

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  • Receiver IQ imbalance compensation method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] The present invention provides a receiver IQ imbalance compensation method, such as figure 1 shown, including steps:

[0069] S100 calculates the pre-calibration parameters and performs pre-calibration to compensate the initial IQ imbalance when the receiver is calibrated at the factory.

[0070] Specifically, when the receiver is calibrated out of the factory, a large unbalance is calibrated in a pre-calibration manner. Although a small amount of unbalance remains, it has little impact on receiving performance. Therefore, before receiving the factory, the pre-calibration function is realized to provide a good foundation for subsequent fine calibration.

[0071] S200 When the receiver is in use, perform fine calibration based on the pre-calibration parameters and fine calibration parameters, so as to compensate the current IQ imbalance.

[0072] Specifically, since the pre-calibration has been done before leaving the factory, the pre-calibration parameters are stored ...

Embodiment 2

[0076] Based on the above embodiments, in this embodiment preferably, as figure 2 , Figure 4 , Figure 5 As shown in step S100, when the receiver is calibrated at the factory, the pre-calibration parameters are calculated and pre-calibrated to compensate for the initial IQ imbalance, including steps:

[0077] S101 Generate a monotone signal through the signal transmitting source and input it to the receiver.

[0078] Specifically, before the receiver leaves the factory, pre-calibration needs to be performed, and the IQ imbalance of the receiver is tested by using a single tone signal as a test signal, and pre-calibration is performed according to the obtained IQ imbalance parameters.

[0079] S102 When in the pre-calibration mode, calculate a first IQ imbalance parameter according to the single tone signal.

[0080] In addition, in this embodiment, preferably, in step S102, when in the pre-calibration mode, calculating the first IQ imbalance parameter according to the sin...

Embodiment 3

[0116] The present invention provides an embodiment of a receiver IQ imbalance compensation method, such as image 3 , Figure 4 , Figure 5 As shown, it is mainly used for IQ imbalance compensation of the receiver, including the following parts: pre-calibration, IQ imbalance parameter estimation, fine calibration, the specific steps are as follows:

[0117] S1. Before the receiver leaves the factory, it is set to the pre-calibration mode during factory calibration to realize the pre-calibration function.

[0118] S11. Initially powered on, a single-tone signal is generated by the signal transmitting source and input to the receiver, and the pre-calibration module is bypassed.

[0119] Scene Selection Judge the current mode as pre-calibration, fine-calibration or Bypass according to the configuration and SNR.

[0120] S12. The received signal is input to the parameter estimation and scene selection module, and given to the IQ imbalance estimation module.

[0121] S121. Recei...

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Abstract

The invention belongs to the field of terminal equipment, and provides a receiver IQ imbalance compensation method and device. The method comprises the steps: calculating a pre-calibration parameter and carrying out the pre-calibration when a receiver is subjected to factory calibration, so as to compensate the initial IQ imbalance; and when the receiver is in a use state, performing fine calibration based on the pre-calibration parameter and the fine calibration parameter to compensate the current IQ imbalance. The IQ imbalance compensation of the receiver is carried out in a mode of combining pre-calibration compensation and fine calibration compensation, the accuracy of compensation is ensured under the condition that the receiving precision is improved, and resources are saved at the same time.

Description

technical field [0001] The invention relates to the field of terminal equipment, in particular to a receiver IQ imbalance compensation method and device. Background technique [0002] Ideally, the amplitude and phase information of the modulated IQ signals should match, the amplitude should be the same, and the phase should be 90 degrees different. However, in an actual communication system, due to physical limitations of circuit hardware and inevitable design errors in circuit design, there will be a mismatch between the amplitude and phase of the two signals, that is, IQ imbalance, which will greatly reduce the error of the receiving system. coding performance. [0003] Existing schemes have adaptive compensation based on training sequences, which require a large number of training sequences and waste spectrum resources. [0004] Secondly, some schemes are based on data statistics performance, but for the convenience of calculation, it is assumed that there is no imbalan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/12
CPCH04B1/123
Inventor 谭定富唐兵武传国是元吉
Owner 上海擎昆信息科技有限公司
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