In this paper we investigate the mutual information in speech between the spectral envelope of the high frequency band and low frequency bands of various widths. Direct methods on the computation of the mutual information often result in an excessive amount of data required even for modest situations. We reduce the required amount of data by quantizing the low band leading to a lower bound expr...

This paper proposes a simple and small-dimensioned antenna that can provide X band Ku for the low-earth-orbiting (LEO) satellite system in an Internet of vehicles system. The is designed on substrate Arlon DiClad 880. structure consists inverted triangle geometry U-shaped slot. dimensions are 12.5 × 5 mm2, area 30 13 0.254 mm3. easy to make, manufacturing cost low. measurement results reflectio...

Varactor tuned printed planar inverted-F antennas (PIFA) are investigated. The low-profile printed antennas are fabricated together with the layouts of its DC control circuits and other RF/baseband circuit footprints. A surface mounted (SMT) varactor is applied as a frequency-tuning element at the middle of the long radiating arm in PIFA. Passive lumped DC bias circuits are implemented with goo...

We report valence and conduction band densities of states measured via ultraviolet and inverse photoemission spectroscopies on three metal halide perovskites, specifically methylammonium lead iodide and bromide and cesium lead bromide (MAPbI3, MAPbBr3, CsPbBr3), grown at two different institutions on different substrates. These are compared with theoretical densities of states (DOS) calculated ...

This paper presents and compares three analytical methods for calculating low frequency band gap boundaries in doubly periodic arrays of resonating thin elastic shells. It is shown that both Foldy-type equations (derived with lattice sum expansions in the vicinity of its poles) and a self-consistent scheme could be used to predict boundaries of low-frequency (below the first Bragg band gap) ban...

Metamaterials realizing stop bands have attracted much attentions recently since they can break-through the well-known mass law. However, achieving the stop band at extremely low frequency has been still a big challenge in the fields of elastic metamaterials. In this paper, we propose a new metamaterial based on the idea of the zero rotational stiffness, to achieve extremely low frequency stop ...

The new current design is especially suitable for use in multi-standard wireless receiver fo r microwaves communicat ion systems. In recent years, there has been a growing market for dual band transceivers for various wireless standards. This work investigates a novel circuit topology of concurrent Dual-band Low Noise Amplifier (LNA) operates in the 3.9 GHz and 4.48 GHz frequency bands for WLAN...

The presence of a low level of M protein in the peripheral blood <3gm/dl which is below the required cut off for the diagnosis of plasma cell myeloma is known as monoclonal gammopathy of undetermined significance (MGUS). Elevated levels of serum M protein and detection of M band on serum protein electrophoresis (SPE) can occur in chronic diseases not related to B cell disorders and not always d...