射频一致性测试的大带宽需求在矢量信号源/分析仪侧引入记忆非线性因素、高阶调制需要仪器回环测试的EVM接近-50dB、频谱平坦度与上行链路带内杂散测量需要达到±0.3dB等，这些需求已经超越硬件设计和经典的校准、补偿方法的能力。本项目研究矢量信号源和分析仪设计技术，包括基带信号处理功能模块，频率综合器功能模块、链路信道功能模块、时钟参考功能模块等。在此基础上，着重研究数字域高精度线性或非线性校准与补偿方法，包括基于快速滤波器组的宽带幅相线性校准、相邻信道相互解耦以及连续干扰消除多速率线性及非线性均衡方法；非圆复数框架下的解耦出幅度及角度不平衡各自均方估计性能的分析方法、前端非理想特性的宽线性和非线性模型、增广宽线性和非线性自适应均衡方法。以期研制出满足IEEE 802.11ac-wave2/ax协议的射频一致性测试仪器，并且为宽带矢量信号源/分析仪的精密校准与补偿提供新的信号处理理论与方法。

Many technical challenges should to be solved urgently for radio frequency conformance testing instruments of IEEE 802.11ac/ax standards. The memory effects of nonlinear model should be considered with the increasing system bandwidth. The IEEE 802.11ax standard is utilizing high-order modulation schemes (1024 QAM) with demanding -50dB error vector magnitude (EVM) requirements for loop testing of the instrument itself. The accuracy of amplitude measurement should be achieved at ±0.3dB for the uplink in-band emissions and spectrum flatness tests. These requirements have exceeded the capabilities of hardware design and classical calibration and compensation methods of the instrument. Firstly, we studies the design scheme of vector signal generator and vector signal analyzer that support 160MHz bandwidth，1024QAM modulation scheme and 8×8 MIMO. The baseband unit, frequency synthesizer, RF module (up-conversion, down-conversion, multiplexer) are investigated in-depth for IEEE 802.11ac/ax RF conformance testing instruments. Secondly, we study high-precision linear or non-linear calibration and compensation methods in digital domain, including wide-band amplitude-phase linear calibration based on fast filter banks, multirate linear equalizer based on decoupling of adjacent channels, and multi-rate linear and non-linear equalization based on successive interference canceling. We study the complementary mean square error (CMSE) analysis methods, this makes it possible to rigorously quantify the contributions to the widely linear performance advantage from the individual real and imaginary channels, an important finding not possible to obtain by using the standard MSE analysis only. We will propose the widely linear models and widely non-linear models and the augmented complex least mean square based widely linear and non-linear adaptive equalizers for describing and compensating non-ideal RF front-end characteristics of instrument. The results may provide theoretical and technical supports for designing WLAN wireless testing instruments, and provide new signal processing methods for the calibration and compensation of broadband vector signal source/analyzer.