Pengpeng Lu

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| Large arrays of radios have been exploited for beamforming and null steering in both radar and communication applications, but cost and form factor limitations have precluded their use in commercial systems. This paper discusses how to build arrays that enable multiuser massive multiple-input–multiple-output (MIMO) and aggressive spatial multiplexing with(More)
Massive MIMO is envisioned as one of the key enabling technologies for 5G wireless and beyond. While utilizing the spatial dimension to reduce interference and increase capacity in multi-user scenarios, massive MIMO base stations present several unique implementation challenges due to their large physical size and the high datarate generated by all the(More)
In the Completely Automated Public Turing test to tell Computer and Humans Apart recognition systems, character segmentation serves as a connecting link between the preceding and the following. By studying a variety of character segmentation algorithms, the improved method combined vertical projection algorithm, improved drop-falling algorithm and BP neural(More)
The leakage power consumption of memories is becoming dominant in a system as technology scaling down. Fast nonvolatile memories (NVMs) offer a tremendous opportunity to eliminate memory leakage current during standby mode. Resistive random access memory (RRAM) with crosspoint structure is considered to be one of the most promising emerging NVMs. However,(More)
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