Impact of Polarization Characteristics on 60-GHz Indoor Radio Communication Systems

Quasi-deterministic millimeter-wave channel models in MiWEBA

“…Uniform distributions are selected for simplicity and can be further enhanced on the base of more extensive measurements. In the 802.11ad channel model [6], the set of approximations was proposed for diagonal and off-diagonal elements of the channel matrix H for the first-and secondorder reflections in typical indoor environments (conference room, cubicle, and living room) as a combination of log-normal and uniform distributions on the base of experimental studies [22]. In the Q-D model, the ray amplitude is approximated by the Rayleigh distribution (which is close to log-normal) so that the simple fixed polarization matrix H p may be used for introducing polarization properties to the R-rays (matrix H is obtained by multiplication of the scalar amplitudes A to the polarization matrix H p ).…”

Studying the impact of ADC quantization noise on 60-GHZ wireless communication systems

“…The chosen values of the signal parameters are typical of personal and local data-transmission systems operated in the the 60-GHz range [4,5]. The parameters of the OFDM and SCFDE systems were chosen so as to equalize the data-transmission rates in two systems and to ensure their comparison under identical conditions.…”

“…It was assumed that the OFDM system uses the 16-QAM and convolution coding with the rate 1/2. The results are presented for the cases of a perfect ADC (whose resolution and input range are infinitely large, such that quantization noise is absent) and an 8-bit ADC with different levels of the attenuation coefficient of the input signal relative to the ADC scale (5,7,9,11, and 13 dB). Similar results for the SCFDE communication system are shown in Fig.…”

“…The considered problem of the impact of ADC quantization noise on characteristics of the communication systems is most topical at present for promising 60-GHz local data-transmission systems (Wi-Fi systems) [4,5]. A large amount of free spectrum for use in this frequency range makes it possible to create wireless communication systems with a usable frequency band of 1-2 GHz and data-transmission rates of up to 2-7 Gbit/s.…”

A fast and accurate method to measure the radiation characteristics of probe-fed circularly-polarized antennas in Mm-wave bands

“…Most antennasolutions use linearly polarized 6-dBi gain antennas or beamforming arrays [1]. However, it has been demonstrated that Circularly Polarized (CP) antennas could be useful when placed at one side of the radio link [2]. To measure the radiation patterns of such antennas, some interesting solutions have shown accurate results especially if microelectronic probes and "free of close metallization" environment are used [3].…”