CAJ | 학술논문

在多通道系统中，通道之间的幅相不一致性往往会使系统的性能恶化。在基于阵列天线波束形成过程中，各通道之间的幅相不一致性会使阵列波束方向图发生畸变；在基于阵列的测向系统中，通道之间的不一致性会使测向伪谱噪底抬高，分辨率降低，因此进行信道均衡就显得特别重要。针对宽带多通道系统，在常规频域均衡算法的基础上提出了改进的频域均衡算法。本算法利用频域采样抽取的思想，并充分利用快速傅里叶变换（FFT）和快速傅里叶逆变换（IFFT）避免了矩阵乘法和求逆运算，大大降低了计算量，利于实际工程实现。仿真分析了该均衡算法的性能，验证了其有效性。
재다통도계통중，통도지간적폭상불일치성왕왕회사계통적성능악화。재기우진렬천선파속형성과정중，각통도지간적폭상불일치성회사진렬파속방향도발생기변；재기우진렬적측향계통중，통도지간적불일치성회사측향위보조저태고，분변솔강저，인차진행신도균형취현득특별중요。침대관대다통도계통，재상규빈역균형산법적기출상제출료개진적빈역균형산법。본산법이용빈역채양추취적사상，병충분이용쾌속부리협변환（FFT）화쾌속부리협역변환（IFFT）피면료구진승법화구역운산，대대강저료계산량，리우실제공정실현。방진분석료해균형산법적성능，험증료기유효성。
The inconsistency between the channels will generally degrade the performance of multi-chan-nel system.In the beam forming process based on array antennas,the channel inconsistency will lead to the beam distortion.When doing direction of arrival estimation based on array antennas,it will also raise the noise floor of the pseudo-spectrum and reduce the spectrum-resolution.Therefore it is necessary to equalize the mismatch between the channels.This paper proposes an improved equalization algorithm based on the conventional frequency-domain equalization method.It takes advantage of the frequency-sampling technique and makes full use of fast Fourier transform(FFT)and inverse fast Fourier transform(IFFT)to reduce the computational burden,avoiding the complex computation of multiplication and inversion with matrices.The simulation results show the performance and the effectiveness of the improved algorithm.