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首页> 外文期刊>Solid-State Circuits, IEEE Journal of >Integrated Self-Adaptive and Power-Scalable Wideband Interference Cancellation for Full-Duplex MIMO Wireless
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Integrated Self-Adaptive and Power-Scalable Wideband Interference Cancellation for Full-Duplex MIMO Wireless

机译：用于全双工MIMO无线的集成自适应和功率可扩展的宽带干扰消除

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摘要

A wideband analog/RF interference cancellation technique that is able to autonomously adapt itself to time-varying interference channels and to scale its dc power based on the number of multiple-input–multiple-output (MIMO) array elements is presented. Least-mean square (LMS) adaptive circuitry is co-designed with and partially embedded in a wideband RF/analog interference canceller and a gain-boosted mixer-first receiver (RX), significantly reducing the system complexity and dc power while achieving rapid (microsecond-scale) adaptation. In addition, the proposed canceller is able to digitally adjust its transconductance and coupling strength at the RX side, essentially trading its dc power with the element-level RX noise figure (NF). At the array level, the NF can be lowered by averaging uncorrelated noise across elements. A prototype 0.5-to-2.5-GHz full-duplex (FD) MIMO RX is designed and fabricated using a 65-nm CMOS process. With the adaptive circuitry fully integrated and consuming 14 mW, the cancellers adapt themselves to an unknown channel in 1 $mu ext{s}$ , providing >20-dB RF/analog interference cancellation across 20-MHz bandwidth (BW) with antenna voltage-standing-wave ratio (VSWR) up to 2:1. Simultaneous self- and cross-interference cancellation in our FD MIMO RX is also demonstrated using the integrated adaptation circuitry, achieving 24-dB overall interference cancellation across 20-MHz BW. The FD MIMO RX with self- and cross-interference cancellation is power-scalable—the NF-power scalability of the FD RX enables a nearly constant canceller dc power per element, despite a quadratic increase of cancellers.
机译：宽带模拟/射频干扰消除技术能够自动调整自动调整到时变干扰通道并基于呈现多输入多输出（MIMO）阵列元件的数量来缩放其DC功率。至少平均方形（LMS）自适应电路与宽带RF /模拟干扰消除器和增益升级的混频器 - 第一接收器（RX）共同设计，显着降低了快速实现的系统复杂性和直流电源（微秒级）适应。另外，所提出的消除器能够在RX侧进行数字调节其跨导和耦合强度，基本上与元素级Rx噪声系数（NF）交易其DC功率。在阵列级别，通过对元素的均匀相关的噪声平均不相关的噪声，可以降低NF。使用65 nm CMOS工艺设计和制造原型0.5至2.5GHz全双工（FD）MIMO RX。通过完全集成和消耗14兆瓦的自适应电路，消除器将自己适应1个未知频道1<内联公式XMLNS：MML =“http://www.w3.org/1998/math/mathml”xmlns：xlink =“http://www.w3.org/1999/xlink”> $ mu text {s} $ ，以20-MHz带宽（BW）提供> 20-DB RF /模拟干扰消除，天线电压 - 立体波比（VSWR）高达2：1。还使用集成的适配电路进行了SUD MIMO RX中的同时自我和交叉干扰消除，在20-MHz BW上实现了24 dB的总干扰消除。尽管取消器的二次增加，FD MIMO RX具有自动和交叉干扰消除的功能 - 可扩展 - FD RX的NF功率可伸缩性使得每个元素的几乎恒定的消除频率直流电源。

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