A 0.6–4.0 GHz RF-Resampling Beamforming Receiver With Frequency-Scaling True-Time-Delays up to Three Carrier Cycles
A 0.6–4.0 GHz RF-Resampling Beamforming Receiver With Frequency-Scaling True-Time-Delays up to Three Carrier Cycles
复制标题
具有高达三个载波周期的频率缩放真实时延的 0.6–4.0 GHz RF 重采样波束成形接收器
DOI：
10.1109/lssc.2020.3012654
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发表时间：
2020
影响因子：
2.7
通讯作者：
J. Ryynänen
中科院分区：
文献类型：
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作者：
Kalle Spoof;M. Zahra;Vishnu Unnikrishnan;K. Stadius;M. Kosunen;J. Ryynänen
真实时间延迟（TTD）通过缓解波束偏斜问题来实现宽带模拟和混合波束成形。这封信报告了一个TTD波束成形接收机支持延迟高达三个载波频率周期。该实现是第一个出版的工作，其中延迟与载波频率的比例。缩放使TTD的大型阵列在低GHz频率，需要长的延迟，由于$\lambda _{c}/2$天线间距。延迟是通过无源混频器的离散时间输出的延迟恢复来实现的。用脉冲跳过的本振（LO）信号驱动混频器，可使延迟范围超过一个载波周期。多相接收器结构防止噪声混叠和由LO脉冲跳跃引起的不想要的音调。我们的原型实现演示了无斜视波束成形的-800 MHz的瞬时RF带宽。建议TTD是有效的大阵列，因为每个天线的功耗只有5-13-mW的0.6-4.0-GHz的频率范围内。该原型在28 nm FD-SOI CMOS中实现，包括键合焊盘在内的管芯面积仅为1.2 mm 2。
True-time-delays (TTDs) enable wideband analog and hybrid beamforming by mitigating the beam squint problem. This letter reports a TTD beamforming receiver supporting delays up to three carrier-frequency cycles. The implementation is the first published work in which the delays scale with the carrier frequency. The scaling enables TTDs for large arrays at low-GHz frequencies where long delays are required due to $\lambda _{c}/2$ antenna spacing. The delays are implemented through delayed resampling of a passive mixer’s discrete-time output. Driving the mixers with pulse-skipped local oscillator (LO) signals allows the delay range to exceed one carrier cycle. A polyphase receiver structure prevents aliasing of noise and unwanted tones caused by LO pulse-skipping. Our prototype implementation demonstrates squint-free beamforming for an-800 MHz instantaneous RF bandwidth. The proposed TTD is efficient for large arrays since the power consumption per antenna is only 5–13-mW across the 0.6–4.0-GHz frequency range. The prototype was implemented in 28-nm FD-SOI CMOS, and the die area including bonding pads is only 1.2 mm2.
大阵列波束形成器的集成离散时延补偿技术
DOI：
10.1109/tcsi.2019.2926309
发表时间：
2019
期刊：
IEEE Transactions on Circuits and Systems I: Regular Papers
影响因子：
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作者：
Ghaderi, Erfan;Sivadhasan Ramani, Ajith;Rahimi, Arya A.;Heo, Deukhyoun;Shekhar, Sudip;Gupta, Subhanshu
通讯作者：
Gupta, Subhanshu
10.8 采用 65nm CMOS 封装、支持模拟时间数字转换器的 4 元件 500MHz 调制带宽 40mW 6b 1GS/s 空间信号处理器
DOI：
10.1109/isscc19947.2020.9063106
发表时间：
2020
期刊：
IEEE International Solid-State Circuits Conference
影响因子：
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作者：
Ghaderi, Erfan;Puglisi, Chase;Bansal, Shrestha;Gupta, Subhanshu
通讯作者：
Gupta, Subhanshu