本文選題：通道失配　切入點：校正　出處：《納米技術(shù)與精密工程》2017年06期

【摘要】：天線陣列通道之間幅相特性的不一致會對天線陣列的性能有很大影響,故在其工作前要對其各通道的幅度和相位特性進行校正.本文針對天線陣列通道之間與頻率無關(guān)的恒定通道失配問題,考慮到天線陣列常常工作在干擾噪聲比較嚴重的低信噪比環(huán)境下,提出了一種改進的變步長LMS算法對失配通道的幅度和相位進行校正.仿真結(jié)果表明,采用誤差自相關(guān)和遺忘累加均值調(diào)節(jié)步長的本文算法,可以很好地校正與頻率無關(guān)的通道失配,與變步長LMS算法相比,在低信噪比環(huán)境下所能校正的幅度和相位精度更高,具有收斂速度更快、穩(wěn)態(tài)誤差更小、抗干擾能力較強的特點,且易于工程實現(xiàn).
[Abstract]:The different amplitude-phase characteristics between the antenna array channels will have a great impact on the performance of the antenna array. Therefore, the amplitude and phase characteristics of each channel should be corrected before it works. In this paper, the frequency independent constant channel mismatch between antenna array channels is discussed. Considering that antenna arrays often work in low signal-to-noise ratio (SNR) environments with severe interference noise, an improved variable step size LMS algorithm is proposed to correct the amplitude and phase of mismatched channels. In this paper, the error autocorrelation and amnesia accumulative mean are used to adjust the step size. The frequency independent channel mismatch can be well corrected. Compared with the variable step size LMS algorithm, the amplitude and phase accuracy can be higher in low SNR environment. It has the characteristics of faster convergence, smaller steady-state error, stronger anti-jamming ability, and is easy to be realized in engineering.
【作者單位】： 精密測試技術(shù)及儀器國家重點實驗室(天津大學);�？怂箍禍y量技術(shù)(青島)有限公司;
【基金】：國家自然科學基金資助項目(51375338)
【分類號】：TN820

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本文編號：1698918