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A kind of iq calibration compensation method and device

A compensation method and a compensation module technology, applied in the field of communication, can solve the problems of too much data, slow calculation process, high and medium frequency symbol rate, etc.

Active Publication Date: 2017-10-03
SANECHIPS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a high intermediate frequency symbol rate in microwave systems or high-speed transmission systems, the traditional IQ calibration blind estimation algorithm counts more data, takes longer, and the calculation process is slow and complicated

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  • A kind of iq calibration compensation method and device
  • A kind of iq calibration compensation method and device
  • A kind of iq calibration compensation method and device

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Embodiment Construction

[0061] In order to solve the problems of long statistical time and slow and complicated calculation process of the IQ calibration blind estimation algorithm in the IDU of the receiving end of the existing microwave system, it is ensured that the calculation is simple, the calculation time is small and the estimation is accurate during IQ calibration. can be used as figure 1 The feedback structure shown. figure 1 Among them, the output of the IQ calibration compensation module is connected to the input of the IQ calibration parameter estimation module, and the output of the IQ calibration parameter estimation module is connected to the input of the IQ calibration compensation module, so that the IQ calibration compensation module and the IQ calibration parameter estimation module form a feedback structure. In actual application, the IQ calibration compensation module receives the input IQ signal, and based on the compensation parameters (amplitude gain of the Q path, phase esti...

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Abstract

The invention discloses an IQ calibration compensation method and device. In the IQ signal output by the IQ calibration compensation module, the accumulated value of the absolute value of the I channel and the accumulated value of the absolute value of the Q channel are respectively filtered to obtain the amplitude of the Q channel. Gain; and filter the accumulated value of the product of the IQ two-way and the square accumulated value of the I way respectively, obtain the phase estimation of the Q way and the magnitude gain of the I way; The IQ calibration compensation module is based on the magnitude gain of the Q way, the phase estimation and the amplitude gain of the I channel, perform IQ calibration compensation not including the matrix iteration process, and output the compensated IQ signal. The present invention performs the above-mentioned filtering process in the process of generating the compensation parameters, so that the present invention does not need to perform the matrix iteration process in the IQ calibration compensation method in the prior art, so that the influence of the uneven distribution of the sampling data is reduced, and the data is increased. Statistics to ensure the accuracy and stability of IQ calibration.

Description

technical field [0001] The invention relates to the communication field, in particular to an in-phase and quadrature (IQ) calibration compensation method and device. Background technique [0002] In a microwave system, the signals of different bandwidths in the indoor unit (IDU) part of the transmitting end pass through the digital intermediate frequency and the analog intermediate frequency and then are sent out through the outdoor unit (ODU) and the antenna, while the receiving end passes through the antenna and the outdoor unit (ODU) Receive the radio frequency signal, convert the received radio frequency signal into an intermediate frequency signal, and then perform corresponding demodulation after passing through the analog intermediate frequency and digital intermediate frequency. In the process of simulating the intermediate frequency, there is a zero-IF processing process, that is, the intermediate frequency carrier signal is down-converted through the analog local o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/38
CPCH04L27/364
Inventor 张国智
Owner SANECHIPS TECH CO LTD