Performance comparison of convolution and Reed–Solomon codes in underwater multipath fading channel

Abstract

In underwater acoustic communication, the transmitted signal is affected by multipath fading and background noise. Therefore, the intersymbol interference (ISI) of underwater acoustic communication systems depends on the effects of these parameters. To cope with ISI due to multipath fading, various equalizers and orthogonal frequency division multiplexing systems have been developed. Forward error correction coding is also adopted to reduce the error by background noise. Here, the performances of convolution code (CC) and Reed–Solomon (RS) code are evaluated in a multipath fading channel. The CC shows better performance in frequency nonselective fading but the RS code shows better performance in frequency selective fading.

40‐4: High‐Temperature Operational Stability of Deep‐Red Phosphorescent OLED with Exciplex‐Forming Host Material and Guest Material

“…We have developed ET-01, a phosphorescent host material with a dibenzoquinoxaline electron-transport skeleton [5], and RD-01, a deep-red phosphorescent dopant iridium (Ir) complex with a phenylpyrazine ring ligand [3]. A top-emission device containing ET-01 and RD-01 in an EmL satisfied the red chromaticity of the BT.2020 standard and had an LT 95 of ~600 h with a driving current density of 10 mA/cm 2 and an initial luminance of ~1500 cd/m 2 at RT [3].…”

“…In the EmLs, ET-01 and ET-02 each forms an exciplex together with the assist material, and excited energy is transferred from the exciplex to the guest material. Such an energy transfer process is referred to as exciplex-triplet energy transfer (ExTET) [5][6][7][8][9]. The ExTET contributes to high efficiency and low driving voltage.…”

10‐4: A 13.3‐inch 8K x 4K 664‐ppi 120‐Hz 12‐bit Display with Super‐wide Color Gamut for the BT.2020 Standard

“…RGR Emission Unit achieved high efficiency and low drive voltage using phosphorescent-layer emission enhanced by energy transfer from an exciplex to a dopant. We call this technique exciplex triplet energy transfer (ExTET) [17][18][19][20][21]. These technologies we newly developed are essential for high efficiency and long lifetime in the white tandem OLED.…”

P‐182: Long‐Life Green Phosphorescent OLED with Light‐Emitting Layer Formed by Two‐Source Evaporation Using Host Material with Novel Hetero Fused Ring

“…Using as host two types of material with different carrier transport properties allows facile adjustment of the carrier balance in the light-emitting layer (EmL). Additionally, in the previous work, we found that an exciplex formed by the two hosts, plays an important role in increasing the efficiency and lifetime of an OLED [9][10][11][12][13][14].…”