In this paper, we investigate the construction of a transmit signal for downlink multiuser multiple-input single-output (MU-MISO) systems under cost-effective 1-bit digital-to-analog converters (DACs). Due to coarse nonliner property, conventional precoding methods, developed infinite-resolution DACs, could not yield an attractive performance having severe error-floor. Finding optimal signal, m...

Single-atom catalysts with high atomic utilization efficiency, well-defined active centers, and catalytic sites low coordination numbers are promising to boost electrocatalytic performance. Dual-atom (DACs) neighboring heteroatoms expected exert the synergistic effect of two atoms, further improving activity. Herein, we report a PtNi-NC catalyst consisting PtNi dual atoms anchored on nitrogen-d...

Terahertz (THz) communication is foreseen to be a key technology for the 6G wireless communications. In this paper, performance of downlink systems with low-resolution digital-to-analog converters (DACs) at Access Point (AP) and/or finite-bit analog-to-digital (ADCs) user sides are investigated. Array-of-subarrays architecture assumed AP, where each RF chain uniquely activates disjoint subset a...

Extremely low-resolution (e.g. one-bit) analog-to-digital converters (ADCs) and digital-to-analog (DACs) can substantially reduce hardware cost power consumption for MIMO radar especially with large scale antennas. In this paper, we focus on the detection performance analysis joint design one-bit ADCs DACs. Specifically, under assumption of low signal-to-noise ratio (SNR) interference-to-noise ...

Traditionally DACs and MACs have been implemented on orthogonal axes: For an operation to be performed, both MAC and DAC access checks must succeed. In this paper, we explore the consequences of making the MAC system primary and allowing only DAC accesses which are consistent with MAC accesses. This both refines the DAC permissions while reducing the complexity of the policy specification. This...

Sigma-delta modulation, where a single-bit quantiser is embedded within a negative feedback loop (Fig. 1), is now a commonly-used technique for implementing high-resolution analogue-to-digital and digital-toanalogue converters (DACs), principally because of a favourable insensitivity to component tolerancing [1]. Single-bit quantisation generates relatively high levels of quantisation noise, he...

Atomically dispersed catalysts are widely adopted in CO2 reduction reaction (CO2RR) due to maximal atomic utilization and high catalytic activity. Dual-atom (DACs), with more active sites distinct electronic structures compared single-atom (SACs), may exhibit diverse performance. Herein, the DAC FeCo–NC SAC Fe–NC/Co–NC employed as probes explore DACs advantage CO2RR. Results show that moderate ...