Spatial Sigma-Delta ADCs: A Low Complexity Architecture for Massive - PowerPoint PPT Presentation

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Spatial Sigma-Delta ADCs: A Low Complexity Architecture for Massive MIMO Lee Swindlehurst Center for Pervasive Communications and Computing University of California Irvine Hans Fischer Senior Fellow, Institute for Advanced Study Technical

Spatial Sigma-Delta ADCs: A Low Complexity Architecture for Massive MIMO Lee Swindlehurst Center for Pervasive Communications and Computing University of California Irvine Hans Fischer Senior Fellow, Institute for Advanced Study Technical University of Munich
Spatial Sigma-Delta ADCs: A Low Complexity Architecture for Massive MIMO Collaborators: Amine Mezghani, Yongzhi Li, Hessam Pirzadeh, Shilpa Rao (UCI) Hela Jedda, Josef Nossek (TU Munich, Germany) Gonzalo Seco Granados (Univ. Autònoma de Barcelona, Spain) Duy Nguyen, Ly V. Nguyen (San Diego State Univ.) Ken Ma (CUHK), Christos Masouros (Univ. College London), etc.
The Road to Gigabit Wireless (5G and Beyond)
A Symbiotic Relationship
Standard Receiver Implementation cos( ! c t ) analog digital BPF LNA sin( ! c t )
A One-Bit Receiver cos( ! c t ) analog digital sign( ¢ ) BPF sign( ¢ ) sin( ! c t )
Single Antenna Theoretical Analysis
Channel Estimation with One-Bit Receivers
16-QAM Example
How to Close the Gap?
Motivation for Spatial Σ∆ Sampling
Temporal Oversampling with Σ∆ ADCs *From Texas Instruments Analog Applications Journal
Temporal Σ∆ ADC Discrete-Time Equivalent Models
Temporal Oversampling with Σ∆ ADCs
Temporal Σ∆ ADC Example
Spatial Σ∆ Quantization
Spatial Σ∆ Quantization, cont.
2 nd Order Σ∆ ADC
2 nd Order Spatial Σ∆ ADC Architecture
Beampatterns Obtained with Spatial Σ∆ ADCs
Channel Estimation
Channel Estimation
Bussgang Analysis – Equivalent Linear Model
Effect of Antenna Spacing & ADC Resolution
Standard 1-Bit Receiver vs. 1-Bit Σ∆
Standard 1-Bit Receiver vs. 1-Bit Σ∆
Standard 1-Bit Receiver vs. 1-Bit Σ∆
Uplink Simulation with Channel Estimation
Uplink Simulation with Channel Estimation
Spectral Efficiency Comparison
Impact of Mutual Coupling
Uplink Simulation with Mutual Coupling
Impact of Mutual Coupling
Impact of Mutual Coupling
Σ∆ Rectangular Array Geometry
PSD of Quantization Noise for Rectangular Array
Conclusions

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