Energy efficient, linear, and wideband mm-wave transceiver front-end for next-generation wireless communication systems
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Author(s)
Huang, Tzu-Yuan
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Abstract
To address the highly growing data-rate demand, it is envisioned that mm-Wave and sub-THz will be extensively employed in a 5G-and-beyond communication system for increases in channel capacity and broader applicable spectra. Viable mm-Wave Tx/PA front-end solutions are required to support multi-Gb/s spectrum-efficiency modulated signals, such as high-order QAMs. Corresponding large PAPRs cause Tx/PA must demonstrate exceptional linearity to maintain signal fidelity and exceptional efficiency at PBO. Such stringent requirements have triggered extensive research on new Tx/PA architectures to further improve the performance at mm-Wave. Similarly, mm-Wave Rx front-end solutions should achieve high sensitivity and linearity while maintaining a wide bandwidth to proceed with high-speed signals. MIMO and phased array architectures are extensively utilized to improve mm-Wave link performance and spatial diversity via beamforming but the corresponding narrow beamwidth substantially complicates the Tx-Rx alignment. Moreover, due to the high complexity of the conventional MIMO systems, it is exceedingly difficult to build multi-beam/streams MIMO systems for multi-beam generation, which requires fundamentally new Rx array architecture. Lastly, for long-distance communications such as satellite links, higher EIRP is required and more MIMO channels within one chip become an urgent need. Due to the critical requirement for integrating more MIMO channels on the same chip for low cost and low form factor, compact high-performance mm-wave and sub-THz TRx front end are highly demanding. To address the aforementioned challenges for the future communication system, this thesis introduces 1) two high-speed efficiency enhancement CMOS and InP PAs supporting 3-to-1 carrier fractional bandwidth, 2) two Rx arrays supporting autonomous beamforming/spatial filtering and multi-beams MIMO communication, and 3) two novel mm-Wave and sub-THz TRx frontend with a small form factor suitable for large-scale array system.
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2023-01-04
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Dissertation