Transmitter and IQ imbalance and DC bias compensation method and device thereof

A technology of DC bias and compensation method, which is applied in the field of communication, can solve the problem of low precision and achieve the effects of accurate compensation precision, low cost and low power consumption

Active Publication Date: 2021-08-13
YICHIP MICROELECTRONICS (HANGZHOU) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For low-power application scenarios, the method of look-up table is generally used for correction, and the accuracy is low

Method used

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  • Transmitter and IQ imbalance and DC bias compensation method and device thereof
  • Transmitter and IQ imbalance and DC bias compensation method and device thereof
  • Transmitter and IQ imbalance and DC bias compensation method and device thereof

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Embodiment Construction

[0019] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described through implementation with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the embodiment of the present invention. Some, but not all, embodiments. All other embodiments obtained by those skilled in the art based on the basic concepts disclosed and suggested by the embodiments of the present invention belong to the protection scope of the present invention.

[0020] The IQ imbalance and DC offset compensation method provided by the embodiment of the present invention is applicable to IQ imbalance and DC offset compensation based on a symmetrical IQ imbalance model, and is also applicable to IQ imbalance based on an asymmetric IQ imbalance model. Compensation for imbalance and DC offset.

[0021] In this emb...

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Abstract

The embodiment of the invention discloses a transmitter and an IQ imbalance and DC bias compensation method and device thereof, and the compensation method comprises the steps: obtaining the envelope characteristics of an x-th modulation signal through a square circuit in the x-th cycle; estimating IQ imbalance and DC bias parameters according to the envelope characteristics of the x-th modulation signal, and obtaining an x-th compensation coefficient; and adopting an x-th compensation coefficient to perform x-th compensation on the IQ imbalance and the DC bias, wherein x is a positive integer. In the embodiment of the invention, the envelope characteristic of a modulation signal is obtained by using a square circuit, then IQ imbalance and DC bias parameters are estimated to obtain a compensation coefficient, and then IQ imbalance and DC bias are pre-compensated. The method is low in cost and low in power consumption, does not need additional compensation components, can meet different application scenes, is more accurate and effective in compensation precision along with the increase of the cycle index, and can improve the performance and stability of a transmitter system.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of communications, and in particular to a transmitter and a method and device for compensating IQ imbalance and DC bias thereof. Background technique [0002] In electronic communication systems, the correction of IQ imbalance is a key factor related to the signal peak-to-average ratio and demodulation bit error rate Ber (Biterror rate). In the transmitter, due to the possible imbalance of the carrier phase, there may be a DC imbalance in the system, and the possible gain imbalance of the power amplifier and other devices will cause the transmitted signal to be non-orthogonal, and then the peak-to-average ratio of the signal and the demodulation bit error rate Ber reduce. In this regard, the industry has proposed many kinds of IQ imbalance estimation and compensation techniques, so as to improve signal transmission quality. [0003] At present, most of the IQ imbalance estimation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/06H04L27/36
CPCH04L25/06H04L27/364H04L27/366
Inventor 左罡
Owner YICHIP MICROELECTRONICS (HANGZHOU) CO LTD
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