Wideband Indoor Radio Propagation Measurements at 5.4 GHz (original) (raw)
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Wide-band frequency domain measurement and modeling of indoor radio channels at 5GHz for future HIPERLAN system are presented. Vector Network Analyzer is used to measure the frequency response of the channel. Impulse response profiles a r e obtained by using inverse Fourier Transform. Empirical values of the RMS delay spread and number of multipath are tested for normal distribution using Anderson-Darling goodness of fit test and the statistics are presented. For most of the cases, RMS deIay spread d u e s showed good fit t o normal distribution, where as the number of multipath values rejected the null-hypothesis that it follows normal distribution. Statistics of the RMS delay spread, number of multipath and the coherence bandwidth are also presented.
Large-Scale Analysis and Modeling for Indoor Propagation at 10 GHz
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, 2020
It is essential to establish dominant propagation mechanisms in indoor environments to model propagation loss for 5th generation networks. This work presents, discusses and analyzes the data of measurement campaigns carried out in the 10 GHz band. These data were obtained in two different scenarios: a corridor and a laboratory. The measurement campaigns were conducted with horn-type directional antennas considering vertical, horizontal and cross-polarization modeling under line-of-sight conditions, where horizontal polarization antenna modeling is the differential of this work. The analysis and comparison of Close-In Reference and Floating Intercept models on a large scale are supported by analysis and considering propagation mechanisms such as reflection and diffraction, which includes calculations of optimal propagation exponent values for each of the polarization in each scenario Index Terms-Channel modeling, radio propagation, 10 GHz, 5G Technology. I. INTRODUCTION Millimetric-wave communication is one of the primary candidate technologies for the new fifthgeneration mobile technologies-5G. Being able to provide of providing multi-Gigabit services such as device-to-device communications (D2D) [1], [2], high-definition television (HDTV), and ultra-highdefinition video (UHDV) [3], [4]. Today's mobile data providers offer high latency video and rich media content via wireless mobile broadband, the restriction would be on bandwidth shortages, as global broadband communications tend to support only around 700 frequency spectra MHz and 2.6 GHz [5]-[7]. Capacity and bandwidth are crucial wireless challenges [7], [8], recent studies suggest the use of mmWave bands to increase bandwidth and create opportunities for more access channels for wireless communications [9]. According to the METIS (Mobile and Wireless Communication Enablers for 2020) project, the 10 GHz band appears as a priority band for indoor propagation environments [5], showing better performance than higher frequency bands [10]-[12]. The 28-29 GHz, 32-33 GHz, 43 GHz, 46-50 GHz, 56-76 GHz, and 81-86 GHz spectrums are also focal points for mmWave networks. The millimetricwaves characterization and modeling in indoor, corridor environments are some of the most important stages in the development of 5G mobile access networks.
Characterization of Indoor Propagation Properties and Performance Evaluation for 2.4Ghz Band Wi-Fi
SSRN Electronic Journal
Indoor wireless systems poses one of the biggest design challenges although it is the most flexible and easily deployable method of implementing Local Area Networks. This difficulty in predicting the propagation of radio frequency wave in indoor environments is caused by reflection, refraction, diffraction and scattering of signals due to closed proximities to furniture, walls, human beings, and reflectors like ceiling, mirrors and glasses. To help improve the user experience and guarantee good quality of service in indoor situations, the research investigated the throughput and attenuation effect on signal with respect to 4, 5, 6 and 9 inches sizes of blocks walls respectively. The characterized Path-loss exponent was 1.999 and differed from the free space model, Wall and Floor Factor model and ITU model by 53.54dB, 6.42dB and 6.85dB respectively.
International Journal of Antennas and Propagation
To cover the high demand for wireless data services for different applications in the wireless networks, different frequency bands below 6 GHz and in millimeter-wave (mm-Wave) above 24 GHz are proposed for the fifth generation (5G) of communication. The communication network is supposed to handle, among others, indoor traffic in normal situations as well as during emergencies. The stairway is one of those areas which has less network traffic during normal conditions but increases significantly during emergencies. This paper presents the radio propagation in an indoor stairway environment based on wideband measurements in the line of sight (LOS) at two candidate frequencies for 5G wireless networks, namely, 3.5 GHz and 28 GHz. The path loss, root mean square (RMS) delay spread, K-factor results, and analysis are provided. The close-in free-space reference distance (CI), floating intercept (FI), and the close-in free-space reference distance with frequency weighting (CIF) path loss mo...
Mediciones de propagación de ondas de radio en banda ancha en interiores para 5.4 Ghz
Wideband indoor time domain measurements at 5.4 GHz are presented in this paper. A swept Time Delay Cross Correlator is used to measure the radio channel, and the measurements are performed using an autonomous robot that follows a predefi ned route line-of-sight and non-line-of-sight modern offi ce buildings. Analysis shows that the RMS delay spread follows a normal distribution whose mean does not always increase with distance. Also, the global statistics of the RMS delay spread follow a truncated normal distribution with a bett er fi t. Results are presented in the form of RMS delay spread and power delay profi les.
Characterization of the indoor radio propagation channel at 2.4 GHz
2000
The unlicensed industrial, scientic, and med- ical (ISM) band at 2.4 GHz has gained increased attention recently due to the high data rate communication systems de- veloped to operate in this band. The paper presents measure- ment results of fading characteristics, multipath parameters and background interference for these frequencies. Some sta- tistical analysis of the measured data is presented. The
Comparison of Empirical Indoor Propagation Models for 4G Wireless Networks at 2.6 GHz
Indoor path loss models are playing an important role in the design and planning of the 4 th generation of the mobile networks. Moreover, it is an important component of system level simulators used to evaluate and test the network performance before it has been established. Many propagation models were proposed for this purpose. Most of these models are for macro and micro cellular networks. Small cell which is known as femtocell has been launched for future networks and it is wildly deployed by the mobile operators around the world. The available propagation models' accuracy is at question when applied to femtocell design and engineering. This paper attempts to quantify the accuracy of these models by studying and comparing seven different propagation models for four different implementation scenarios at 2.6 GHz and for different separation distances.
Comparative Study of Indoor Propagation Model Below and Above 6 GHz for 5G Wireless Networks
Electronics, 2019
It has been widely speculated that the performance of the next generation based wireless network should meet a transmission speed on the order of 1000 times more than the current cellular communication systems. The frequency bands above 6 GHz have received significant attention lately as a prospective band for next generation 5G systems. The propagation characteristics for 5G networks need to be fully understood for the 5G system design. This paper presents the channel propagation characteristics for a 5G system in line of sight (LOS) and non-LOS (NLOS) scenarios. The diffraction loss (DL) and frequency drop (FD) are investigated based on collected measurement data. Indoor measurement results obtained using a high-resolution channel sounder equipped with directional horn antennas at 3.5 GHz and 28 GHz as a comparative study of the two bands below and above 6 GHz. The parameters for path loss using different path loss models of single and multi-frequencies have been estimated. The ex...
IJERT-Indoor Measurement And Propagation Prediction Of WLAN At 2.4GHz
International Journal of Engineering Research and Technology (IJERT), 2013
https://www.ijert.org/indoor-measurement-and-propagation-prediction-of-wlan-at-2.4ghz https://www.ijert.org/research/indoor-measurement-and-propagation-prediction-of-wlan-at-2.4ghz-IJERTV2IS70411.pdf With the low cost and high-speed data rate capabilities, installations of IEEE 802.11-based wireless local area networks (WLANs) are growing exponentially. Most wireless access points are deployed in the immediate vicinity of where wireless coverage is desired and the system typically seems to work. The performance of such an ad-hoc deployed network is much less than what could be achieved by proper network design. Indeed, many organizations are already noticing the actual data rate limitations of large scale, highly loaded WLANs that have been installed in an ad-hoc fashion. To assist in optimal deployment of indoor wireless system, characterization of the indoor radio propagation channel is essential. This project achieves this by carrying out extensive field strength measurements at different coverage angles in an already existing IEEE 802.11g WLAN network at 2.4GHz. Based on the statistics of the measured data, empirical propagation channel model is developed. By using this propagation model, network analysis and simulations can be efficiently carried out. This will facilitate faster and more accurate deployment of wireless networks.