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An ordered array of droplets is self‐organized and each droplet possesses a PS kernel surrounded by a PMMA rim. The formation of a regular pattern depends on the initial thickness of the polymer film and the interstitial separation of the excavated holes on the substrate; a scaling relation has been observed. This effect suggests that a low‐cost and convenient approach to generate regular polymer...
In this paper, a blind method to detect and suppress narrow-band interference (NBI) for multi-band orthogonal frequency-division multiplexing (MB-OFDM) based ultrawideband (UWB) communications is proposed. The method utilizes mean-square-error (MSE) statistics in the frequency domain to detect subcarriers damaged by NBI. Approximating the MSE statistics by a decision-feedback (DF) scheme creates a...
A multiple-input multiple-output (MIMO) baseband transceiver for multi-band orthogonal frequency-division multiplexing (MB-OFDM) ultra-wideband (UWB) communications is proposed in the paper. In the transceiver, a spatial multiplexing scheme with four transmit and four receive antennas is utilized to increase spectrum efficiency and achieve 1.92-Gbps data rate. Performance of both the MIMO and single-input...
This paper presents a multi-band orthogonal frequency-division multiplexing (MB-OFDM) based ultra-wideband (UWB) baseband inner transceiver. Design challenges arise from the requirements for high data rates, low power consumption, and low cost. The proposed UWB transceiver utilizes both pipelined and parallel structures to reduce the critical path and increase the system throughput. Implemented by...
In this paper, a novel high-speed interleaver/deinterleaver is proposed. As data rates demanded in emerging communication applications increase, architectures for high-speed interleaving become essential. Three pipelined blocks comprise the interleaver to execute three permutation steps in high speed. The addition of static random access memories (SRAM) in stage 1 speeds up 24 times of interleaving...
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