Simulation Design of a Multipath Fading Module in Wireless Channel Simulation

2019 ◽  
Author(s):  
Bingyin Ren ◽  
Pengcheng Guo ◽  
Taotao Zhang ◽  
Hailong Ge ◽  
Yongxin Zhang
Keyword(s):  
Multipath Fading ◽  
Wireless Channel ◽  
Simulation Design ◽  
Channel Simulation

scholarly journals Iterative Channel Estimation for the Chinese Digital Television Terrestrial Broadcasting Systems with the Multiple-Antenna Receivers

2012 ◽  
Vol 6-7 ◽  
pp. 439-444
Author(s):  
Zi Wei Zheng
Keyword(s):  
Fourier Transform ◽  
Channel Estimation ◽  
Fast Fourier Transform ◽  
Orthogonal Frequency Division Multiplexing ◽  
Multipath Fading ◽  
Wireless Channel ◽  
Digital Television ◽  
Frequency Division Multiplexing ◽  
Multiple Antenna ◽  
Frequency Division

Orthogonal frequency division multiplexing is an effective against multipath fading and high data throughput wireless channel transmission technology. Assistance with the inverse fast Fourier transform and fast Fourier transform operation, orthogonal frequency division multiplexing modulation and demodulation operations of the system convenient and convenient hardware implementation, orthogonal frequency division multiplexing, so in the modern digital television terrestrial broadcasting the system is widely used to support high performance bandwidth-efficient multimedia services. Broadband multi-carrier orthogonal frequency division multiplexing with multi-antenna and multi-antenna receiving system, to increase the diversity gain and improve the capacity of the system in different multipath fading channel. Accurate channel estimation in a simple channel equalization and decoding of broadband multi-carrier orthogonal frequency division multiple-antenna receiver and channel estimation accuracy and multiplexing system is very important, is the key to the performance of the overall broadband multi-carrier orthogonal frequency division multiplexing system in the multi-antenna receiver bit error rate. In this paper, iterative channel estimation to plan for digital terrestrial television broadcasting broadband multi-carrier orthogonal frequency division multiple antenna receiver multiplexing system proposal.

scholarly journals Channel Estimation in DCT-Based OFDM

2014 ◽  
Vol 2014 ◽  
pp. 1-6
Author(s):  
Yulin Wang ◽  
Gengxin Zhang ◽  
Zhidong Xie ◽  
Jing Hu
Keyword(s):  
Channel Estimation ◽  
Orthogonal Frequency Division Multiplexing ◽  
Multipath Fading ◽  
Wireless Channel ◽  
Least Square ◽  
System Throughput ◽  
Multipath Fading Channel ◽  
Channel Response ◽  
Coherent Demodulation ◽  
And Performance

This paper derives the channel estimation of a discrete cosine transform- (DCT-) based orthogonal frequency-division multiplexing (OFDM) system over a frequency-selective multipath fading channel. Channel estimation has been proved to improve system throughput and performance by allowing for coherent demodulation. Pilot-aided methods are traditionally used to learn the channel response. Least square (LS) and mean square error estimators (MMSE) are investigated. We also study a compressed sensing (CS) based channel estimation, which takes the sparse property of wireless channel into account. Simulation results have shown that the CS based channel estimation is expected to have better performance than LS. However MMSE can achieve optimal performance because of prior knowledge of the channel statistic.

Radio over Fibre Transport of Alamouti-coded MIMO Signals with Self-Recovery Capability

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Jaswinder Kaur ◽  
Vishal Sharma
Keyword(s):  
Spectral Efficiency ◽  
High Speed ◽  
Multipath Fading ◽  
Block Code ◽  
Wireless Channel ◽  
Modulation Scheme ◽  
Wireless Data ◽  
Wireless System ◽  
Radio Over Fibre ◽  
The Impact

AbstractRadio over Fibre (RoF) transport of high-speed wireless data provides a comprehensive solution for the forthcoming highly-reliable and spectral-efficient wireless systems. MIMO is one of the most widely used wireless technologies to increase the system reliability and capacity without any increased demand of power/bandwidth. However, the inherent non-linearities of RoF link and the multipath fading of the wireless channel can degrade the overall performance of the wireless system. In this work, authors demonstrate RoF transport of adaptively modulated MIMO signals and report the improvement in spectral efficiency under the impact of RoF link non-linearity. The transmitter of the proposed RoF based wireless system selects the appropriate modulation scheme with the assumption of perfect channel state information to achieve the acceptable BER at the subscriber end. The spectral efficiency improvement by this self-recovering MIMO-RoF system is evaluated by incorporating orthogonal Space-Time Block Code with 2 × 2 antenna configuration over the frequency-selective Rayleigh fading channel.

Wireless channel simulation using geometrical models extrated from point clouds

2018 ◽  
Author(s):  
Juan Pascual-Garcia ◽  
Jose-Maria Molina-Garcia-Pardo ◽  
Maria-Teresa Martinez-Ingles ◽  
Jose-Victor Rodriguez ◽  
Leandro Juan-Llacer
Keyword(s):  
Point Clouds ◽  
Wireless Channel ◽  
Channel Simulation

scholarly journals Design of Orthogonal Variable Spreading Factor (OVSF) Performance Simulation Program in Multipath Fading Channels

2020 ◽  
Vol 4 (2) ◽  
pp. 64
Author(s):  
I Gede Arya Gangga Gajanada ◽  
Nyoman Pramaita ◽  
I Gusti Agung Komang Diafari Djuni Hartawan
Keyword(s):  
Fading Channels ◽  
Multipath Propagation ◽  
Multipath Fading ◽  
Wireless Channel ◽  
Delay Spread ◽  
Spreading Factor ◽  
Multipath Fading Channel ◽  
Multipath Fading Channels ◽  
Orthogonal Variable Spreading Factor ◽  
Ovsf Codes

The characteristics of wireless channel are determined by multipath propagation. The transmitted signal will be scattered so that it produces fading. Fading influenced by multipath component will cause delay spread which damages the signal. Thus, spread spectrum technology is used by using a bandwidth that is greater than the original signal. The objective of this study was to determine the effect of the number of multipath components on orthogonal variable spreading factor (OVSF) codes on multipath fading channels viewed from values and Bit Error Rate (BER) graphs versus Energy Bits per Noise (Eb/No). This study would compare the performance of OVSF code communication system on multipath channels by varying multipath components of 4, 8, 12, 16 and the length of OVSF codes used of 16, 8 and 4. The simulation results showed an increase in BER values when the number of multipath components was added. The more the number of multipath components used, the more the number of reflected signals that will interfere with the desired signal in the receiver. The length of the OVSF code influences the performance of the OVSF code on the multipath fading channel, because each code has a different processing gain value that is affected by the length of the code used

scholarly journals The Development of FPGA-based Wireless Channel Simulator using LabVIEW

2013 ◽  
Vol 64 (3) ◽  
Author(s):  
Nor Aswani Mamat ◽  
Razali Ngah ◽  
Uche A.K Chude Okonkwo ◽  
Muhamad Asmi Ramli
Keyword(s):  
Wireless Communication ◽  
Doppler Shift ◽  
Channel Model ◽  
Wireless Channel ◽  
Communication Link ◽  
Good Communication ◽  
Time Frequency ◽  
Channel Simulation ◽  
Increasing Demand ◽  
Channel Simulator

The development of channel model for wireless communication system is currently becoming important to fulfill the entire user’s requirements and increasing demand where to provide a good communication link between the users at everywhere and anytime. An accurate techniques or operator is needed to model a very flexible channel for wireless communication application. Previous channel model is developed based on the time-frequency operator which is limited to Narrowband signaling. This operator uses Doppler shift to account for mobility in propagation space. This paper proposes a Wideband channel model which is valid for all kind of signaling and conditions. Mathematical channel model is used to represent a generic channel simulator which is implemented as channel simulator. The development and measurement of channel simulator is using LabVIEW. The LabVIEW can be used as basic software and can be turned into hardware part by connecting to other devices for real-time channel simulation. The illustration and snapshot of the channel simulator modeling in term of LabVIEW code program are presented.

Sign in / Sign up

Export Citation Format

Share Document