NEC exits 4G/5G base station market underscoring Japan''s weak
Fujitsu spun off its communications-related business, including base stations, into a new subsidiary this July. Kyocera, which had planned to enter the 5G base station market in
5G networks divide coverage areas into smaller zones called cells, enabling devices to connect to local base stations via radio. Each station connects to the broader telephone network and the Internet through high-speed optical fiber or wireless backhaul.
Sun et al. 23 presented a multipath parameter extraction scheme by interference cancellation in 5G networks. A cancellation-based algorithm is introduced to strengthen the sound of passive channels. It deals with multi-cell interference from neighbouring cells operating at the same frequency band.
Base stations (gNBs) often operate at greater power levels, typically about 40–46 dBm (10–40 W), whereas standard 5G user equipment (UE) transmission powers vary from 23 dBm (200 mW) to 30 dBm (1 W).
Li et al. 30 proposed a photonic-assisted interference cancellation scheme for 5G centralized communication networks. The strategy uses integrated optical modulators with more than 35 dB self-interference cancellation and more than 25 dB image rejection ratio. It eliminates fibre dispersion as well as stability and performance.
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