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300-GHz-Band CMOS Transmitter and Receiver Modules with WR-3.4 Waveguide Interface
This paper reviews 300-GHz-band CMOS transmitter (TX) and receiver (RX) modules with a WR-3.4 waveguide interface that allows a high-gain antenna or some other component like an amplifier to be connected. A TX or RX chip fabricated using a ...
W-band PAM-4 wireless delivery employing intensity modulation and coherent detection based on CMMA equalization
We have experimentally demonstrated PAM-4 signals generation and millimeter wave wireless transmission at 90-GHz W-band, respectively, enabled by using an intensity modulator and coherent receiver. The bit-error-ratio (BER) performance can ...
Reliable Multi-user Uplinks in Fiber-Wireless Integrated Network using Quasi-orthogonal Chirp Spreading OFDM
We experimentally demonstrate a grant-free multiuser upstream with a quasi-orthogonal chirp spreading (QOCS) orthogonal frequency division multiplexing (OFDM) in an intensity-modulation and direct-detection based fiber-wireless convergence ...
Towards Dynamic 5G Networks Utilizing Flexible Function Split
The migration of wireless mobile networks from the relatively limited microwave radio spectrum to the “all-spectrum” principle of communication, which aims to make use of microwave and millimeter wave mobile networks as well as fixed poin...
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An in-band full-duplex transceiver prototype with an in-system automated tuning for RF self-interference cancellation
This paper presents a transceiver prototype capable of in-band full duplex communication. Apart from a conventional transceiver and antenna, this prototype relies on a tunable electrical balance duplexer to minimize the in-band self-interfe...
Techniques to improve power amplifier energy efficiency for 5G
Improved spectral and energy efficiency are two key requirements for the fifth generation (5G) wireless communication systems. The inefficiency and non-linearity of traditional power amplifiers (PA) pose significant challenges to meet these...