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We have developed 120-GHz-band wireless equipment that can transmit 10-Gbit/s data signal over a distance of more than 5 km. In order to increase the output power of the120-GHz-band wireless equipment, we used a millimeter-wave amplifier that integrates 0.08-μm-gate-length InGaAs/InP composite-channel high-electron-mobility transistors. The output power of the wireless equipment becomes 16 dBm. The...
This paper presents a 120-GHz band binary phase shift keying (BPSK) modulator and demodulator fabricated on microwave monolithic integrated circuits (MMICs) for a 10-Gbit/s wireless link. The direct-conversion modulator consists of a 180deg hybrid coupler, gain-control amplifiers, and Wilkinson combiner. The delay demodulator has a 100-ps delay line made of coplanar waveguides and a voltage-controlled...
Results of a propagation study focused on rain attenuation on 120-GHz band wireless link are presented. The 120-GHz band wireless link with V polarization was operated on a 400-m long path from December 2007 to September 2008 in Atsugi, Japan. The rain rate distribution for Atsugi is in good agreement with the conditional M distributions. As for rain attenuation, the effect of water on the antenna...
In this paper, we present 10-Gbit/s wireless data transmission with FEC that is used for optical fiber data transmission. We evaluated the gains of coding by using a back-to-back data transmission system and compared them with those in outdoor data transmission experiments.
A novel automatic dispersion compensation system for WDM systems that is based on mode-splitting of tone-modulated CS-RZ signals is proposed and its compensation capability is demonstrated by 100 GHz spaced 8×43 Gbit/s WDM transmission.
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