Millimeter wave personal communications system using fiber-optic links

This paper describes work on wide-band millimeterwave (MMW)/optical-network applications in Japan-in particular, projects being pursued at the Advanced Telecommunications Research Institute (ATR). Digital-signal transmission at 118 Mb/s was tested. Results of the experiments demonstrate that highspeed digital-signal transmission, with a total carrier-to-noise ratio (C/N) degradation of less than 1.2 dB from a modem at a BER of 10 06 , is feasible. Similarly, analog FM-signal transmission with a weighted S/N of more than 45 dB is also feasible at a signal bandwidth of 18 MHz and FM carrier frequency of 43.75 GHz. Based on these results, a demonstration system was constructed, and the feasibility of the system was confirmed. Several key technologies for system construction such as an MMW optical modulator and an MMW high-speed p-i-n detector and some related technologies are also described. In addition, an advanced system considered suitable for future high-speed mobile communications is proposed. This system employs an optical signal-processing multibeam antenna, where the direction of each sharp beam can be adaptively controlled.Index Terms-Beamforming network, millimeter wave, millimeter wave/optical interaction, millimeter-wave subcarrier system, mobile communication system, optical signal-processing antennas.

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“…3(b). It was found that a weighted S/N of more than 45 dB can be achieved with a transmission distance of more than 50 m [29].…”

Section: Mmw/optical Network System Developed At Atrmentioning

confidence: 98%

Wide-band millimeter-wave/optical-network applications in Japan

Imai

Kawamura²,

Inagaki³

et al. 1997

IEEE Trans. Microwave Theory Techn.

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“…It is similar to the subcarrier multiplexed ͑SCM͒ system in fiber optical communication fields. 15,16 The rf signal is added to the light in the laser diode ͑LD͒, and it then passes through the source fiber, medium and detecting fiber, and is at last received and recovered by the optical detector ͑the PMT is used in Figure 1͒.…”

Section: Transmission Model Of the Rf Signalmentioning

confidence: 99%

“…Given k is the Boltzmann constant (1.37eϪ23 J/K), T is the kelvin temperature ͑ϳ300 K͒, F is the noise figure of the first amplifier, q is the elementary charge (1.6eϪ19C), I dark is the anode dark current of the PMT, RIN is the intensity noise figure of the LD ͑ϳ100 dB/Hz͒, B is the bandwidth of the instrument and Z is the load resistor ͑ϳ50 ⍀͒, we can express the main noises as follows: [15][16][17] ͑i͒ Thermal noise current density:…”

Section: Signal Noise and Snr Of The Instrumentmentioning

confidence: 99%

Analysis on performance and optimization of frequency-domain near-infrared instruments

Chen

Zhang

et al. 2002

J. Biomed. Opt.

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Frequency-domain near-infrared techniques have been widely used to detect the optical properties of biological tissues noninvasively. In this paper we propose an analytical model to evaluate the performance of frequency-domain instruments. Based on the diffusion equation and the transfer properties of optoelectronic components, we treat all parts, including the medium, as two-port networks and apply systematic methods to answer questions concerning frequency-domain instruments. Experiments show that this method can reasonably reflect the properties of the instrument within an accuracy of 7%. This kind of method can be used to design suitable instruments for various applications. We also analyze the selection of the instrument parameters to achieve optimal performance at an efficient cost using this analytical model.

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An experimental study on a self-oscillating optoelectronic up-converter that uses a heterojunction bipolar transistor

Sawasa

Imai

1999

IEEE Trans. Microwave Theory Techn.

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Millimeter wave personal communications system using fiber-optic links

Cited by 6 publications

References 7 publications

Wide-band millimeter-wave/optical-network applications in Japan

Wide-band millimeter-wave/optical-network applications in Japan

Analysis on performance and optimization of frequency-domain near-infrared instruments

An experimental study on a self-oscillating optoelectronic up-converter that uses a heterojunction bipolar transistor

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