scholarly journals 3D Air-Ground Channel Model Reconstruction Based on the Experimental Data and Q-D Method

2020 ◽  
Author(s):  
Alexander Maltsev ◽  
Olesya Bolkhovskaya ◽  
Vadim Sergeev ◽  
Anton Elokhin ◽  
Alexander Kokarev
Keyword(s):  
Experimental Data ◽  
Antenna Arrays ◽  
System Performance ◽  
Channel Model ◽  
Directional Antennas ◽  
Doppler Spread ◽  
Model Reconstruction ◽  
Channel Models ◽  
Communication System Performance ◽  
Radio Systems

This paper proposes to use the Q-D (Quasi-Deterministic) method for reconstructing the angular and frequency characteristics of the 3D Air-to-Ground (A-G) channel from the available experimental data. This method allows to expand the applicability of tapped delay line (TDL) channel models for performance investigation of the aviation radio systems with directional antennas and multi-element antenna arrays. The developed 3D A-G channel models also give opportunity to take into account Doppler spread impact on the communication system performance.

MIMO Systems in a Composite Fading and Generalized Noise Scenario: A Review

2020 ◽  
Vol 14 ◽  
Author(s):  
Keerti Tiwari
Keyword(s):  
System Performance ◽  
Performance Enhancement ◽  
Channel Model ◽  
Mimo Systems ◽  
Mimo System ◽  
Spatial Diversity ◽  
Spatial Multiplexing ◽  
Channel Models ◽  
Efficient System ◽  
Composite Channel

: Multiple-input multiple-output (MIMO) systems have been endorsed to enable future wireless communication requirements. The efficient system designing appeals an appropriate channel model, that considers all the dominating effects of wireless environment. Therefore, some complex or less analytically acquiescent composite channel models have been proposed typically for single-input single-output (SISO) systems. These models are explicitly employed for mobile applications, though, we need a specific study of a model for MIMO system which can deal with radar clutters and different indoor/outdoor and mobile communication environments. Subsequently, the performance enhancement of MIMO system is also required in such scenario. The system performance enhancement can be examined by low error rate and high capacity using spatial diversity and spatial multiplexing respectively. Furthermore, for a more feasible and practical system modeling, we require a generalized noise model along with a composite channel model. Thus, all the patents related to MIMO channel models are revised to achieve the near optimal system performance in real world scenario. This review paper offers the methods to improve MIMO system performance in less and severe fading as well as shadowing environment and focused on a composite Weibull-gamma fading model. The development is the collective effects of selecting the appropriate channel models, spatial multiplexing/detection and spatial diversity techniques both at the transmitter and the receivers in the presence of arbitrary noise.

scholarly journals Model Kanal 5G Frekuensi 28 GHz dengan Pengaruh Suhu di Kota Yogyakarta

2020 ◽  
Vol 8 (2) ◽  
pp. 276
Author(s):  
KHOIRUN NI’AMAH, ◽  
SHELLY NURJANAH ◽  
ACHMAD RIZAL DANISYA
Keyword(s):  
Outage Probability ◽  
Communication System ◽  
Minimum Temperature ◽  
System Performance ◽  
Network Performance ◽  
Channel Model ◽  
Optimal Performance ◽  
Communication System Performance ◽  
Qam Modulation ◽  
Model Temperature

ABSTRAKPenelitian ini melakukan pengujian pada model kanal 5G di jaringan masa depan. Karakteristik model kanal sangat mempengaruhi performansi jaringan pada penggunakan frekuensi mmWave di atas 6 GHz yang sensitif terhadap pengaruh alam. Oleh karena itu perlu untuk mengetahui karakteristik kanal agar menghasilkan performansi yang optimal. Evaluasi kerja pada penelitian ini menggunakan frekuensi 28 GHz, modulasi 16-QAM, bandwidth 50 MHz dan CPOFDM. Hasil penelitian menunjukkan perbandingan model kanal 5G untuk mendapatkan outage probability sebesar 10^-4 pada suhu maksimum dan minimum sehingga didapatkan Eb/No yang dibutuhkan untuk coding rate 1:2 adalah 17,26 dB dan 15,25 dB, coding rate 3:4 adalah 19,53 dB dan 17,45 dB dan coding rate 1 adalah 22,11 dB dan 19,82 dB. Hal ini menunjukkan bahwa suhu mempengaruhi performansi sistem komunikasi pada 5G dan menunjukkan bahwa dengan coding rate setengah lebih efisien dalam kualitas dan kapasitas kanal.Kata kunci: 5G, Model Kanal, Suhu, 28 MHz, CP-OFDM ABSTRACTThis research is testing the 5G channel model in the future network. The characteristics of the channel model greatly affect network performance in the use of mmWave frequencies above 6 GHz which are sensitive to natural influences. Therefore it is necessary to know the characteristics of the channel in order to produce optimal performance. The work evaluation in this study uses 28 GHz frequency, 16-QAM modulation, 50 MHz bandwidth and CP-OFDM. The results showed a comparison of the 5G channel model to get an outage probability of 10^-4 at maximum and minimum temperatures so that the Eb / No needed for coding rate 1:2 was 17.26 dB and 15.25 dB, coding rate 3:4 was 19.53 dB and 17.45 dB and coding rate 1 are 22.11 dB and 19.82 dB. This shows that the temperature affects the communication system performance at 5G and shows that with coding rate ½ and the minimum temperature is more efficient in the quality and capacity of the channel.Keywords: 5G, Channel Model, Temperature, 28 MHz, CP-OFDM

scholarly journals MIMO Fading Emulator Development with FPGA and Its Application to Performance Evaluation of Mobile Radio Systems

2017 ◽  
Vol 2017 ◽  
pp. 1-15 ◽  
Author(s):  
Yoshio Karasawa ◽  
Katsuhiro Nakada ◽  
Guijiang Sun ◽  
Rikako Kotani
Keyword(s):  
Channel Model ◽  
Multiple Input Multiple Output ◽  
New Developments ◽  
Performance Limit ◽  
Stage Scheme ◽  
Mobile Radio Systems ◽  
Multiple Input ◽  
Field Programmable ◽  
Input Multiple Output ◽  
Radio Systems

We present four new developments for a multiple-input multiple-output (MIMO) over-the-air measurement system based on our previous studies. The first two developments relate to the channel model for multipath environment generation. One is a further simplification of the circuit configuration without performance degradation by reducing the number of delay generation units, which dominate the performance limit when implementing the circuit on a field-programmable gate array (FPGA). The other is to realize spatial correlation characteristics among the input ports on the transmission side, whereas the previously proposed channel model did not consider this correlation. The third development involves the details of implementing the MIMO fading emulator on an FPGA as a two-stage scheme. The fourth is the demonstration of application examples of the developed system.

Spatial Correlations of a 3-D Non-Stationary MIMO Channel Model With 3-D Antenna Arrays and 3-D Arbitrary Trajectories

2019 ◽  
Vol 8 (2) ◽  
pp. 512-515 ◽  
Author(s):  
Qiuming Zhu ◽  
Ying Yang ◽  
Cheng-Xiang Wang ◽  
Yi Tan ◽  
Jian Sun ◽  
...  
Keyword(s):  
Antenna Arrays ◽  
Channel Model ◽  
Mimo Channel ◽  
Spatial Correlations

scholarly journals Tracking- and Scintillation-Aware Channel Model for GEO Satellite to Land Mobile Terminals at Ku-Band

2015 ◽  
Vol 2015 ◽  
pp. 1-15 ◽  
Author(s):  
Ali M. Al-Saegh ◽  
A. Sali ◽  
J. S. Mandeep ◽  
Alyani Ismail
Keyword(s):  
Channel Model ◽  
Signal To Noise Ratio ◽  
Wide Band ◽  
Mobile Terminal ◽  
Directional Antennas ◽  
Coding Schemes ◽  
Significant Performance ◽  
Mobile Satellite ◽  
Tropospheric Scintillation ◽  
Ku Band

Recent advances in satellite to land mobile terminal services and technologies, which utilize high frequencies with directional antennas, have made the design of an appropriate model for land mobile satellite (LMS) channels a necessity. This paper presents LMS channel model at Ku-band with features that enhance accuracy, comprehensiveness, and reliability. The effect of satellite tracking loss at different mobile terminal speeds is considered for directional mobile antenna systems, a reliable tropospheric scintillation model for an LMS scenario at tropical and temperate regions is presented, and finally a new quality indicator module for different modulation and coding schemes is included. The proposedextended LMS channel (ELMSC)model is designed based on actual experimental measurements and can be applied to narrow- and wide-band signals at different regions and at different speeds and multichannel states. The proposed model exhibits lower root mean square error (RMSE) and significant performance observation compared with the conventional model in terms of the signal fluctuations, fade depth, signal-to-noise ratio (SNR), and quality indicators accompanied for several transmission schemes.

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