基于數(shù)字預(yù)失真的發(fā)射機(jī)I/Q不平衡矯正

陳雷; 岳光榮; 唐俊林; 李少謙; 宋志群; 曾媛

doi:10.11999/JEIT160581

基于數(shù)字預(yù)失真的發(fā)射機(jī)I/Q不平衡矯正

doi: 10.11999/JEIT160581

2.
(電子科技大學(xué)通信抗干擾國(guó)家級(jí)重點(diǎn)實(shí)驗(yàn)室成都 611731) ②(中國(guó)電子科技公司第54研究所通信網(wǎng)信息傳輸與分發(fā)技術(shù)重點(diǎn)實(shí)驗(yàn)室石家莊 050081) ③(上海宇航系統(tǒng)工程研究所上海 201108)

基金項(xiàng)目:

國(guó)家科技重大專(zhuān)項(xiàng)課題(2013ZX03005010)，通信網(wǎng)信息傳輸與分發(fā)技術(shù)重點(diǎn)實(shí)驗(yàn)室開(kāi)放課題(KX152600016/ITD- U15007)，國(guó)家自然科學(xué)基金(61371103, 61401447)

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- 文章訪(fǎng)問(wèn)數(shù): 1688
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2016-06-03
- 修回日期: 2016-12-13
- 刊出日期: 2017-04-19

Calibration of Transmitter I/Q Imbalance Based on Digital Pre-distortion

2.
(National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu 611731, China)

Funds:

The National Science and Technology Major Project (2013ZX03005010), ITDCN Open Program (KX152600016 /ITD-U15007), The National Natural Science Foundation of China (61371103, 61401447)

摘要

摘要: 同相支路(I路)與正交支路(Q路)不平衡、載波泄漏以及帶內(nèi)失真會(huì)造成系統(tǒng)性能損失，尤其是在采用直接變頻結(jié)構(gòu)的發(fā)射機(jī)中。該文提出一種自適應(yīng)I/Q不平衡矯正方案，針對(duì)發(fā)射機(jī)中存在的與頻率相關(guān)的I/Q不平衡、載波泄漏以及帶內(nèi)失真進(jìn)行矯正。該文方案直接估計(jì)I/Q兩支路的反濾波器，避免了先求響應(yīng)再求逆響應(yīng)的額外運(yùn)算，降低了運(yùn)算復(fù)雜度。同時(shí)，該文還提出一種基于迭代的在線(xiàn)追蹤方案，用于跟蹤由于發(fā)射機(jī)溫度變化造成的I/Q不平衡的參數(shù)漂移現(xiàn)象。經(jīng)過(guò)復(fù)雜度分析，該文提出的方案擁有很高的補(bǔ)償效率。最后，仿真結(jié)果驗(yàn)證了兩種方案針對(duì)各類(lèi)射頻損傷矯正的有效性。
- 無(wú)線(xiàn)通信 /
- 發(fā)射機(jī)矯正 /
- 射頻損傷
Abstract: The in-phase (I) and quadrature (Q) imbalance, carrier leakage and in-band distortion may lead to severe performance degradation, especially in direct-conversion radio architecture. An adaptive pre-distortion scheme is proposed to calibrate I/Q imbalance, carrier leakage and in-band distortion. In the proposed scheme, the inverse filter of each branch is estimated directly which avoids redundant computation. Moreover, an iterative scheme is proposed to track the parameters variation due to temperature in an online manner. By complexity analysis, the proposed scheme is efficient. The effectiveness of the scheme is testified by simulation.
- Wireless communications /
- Transmitter calibration /
- RF impairments

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參考文獻(xiàn)(12)

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