Results 91 to 100 of about 1,259,174 (207)

Genetic algorithm assisted Joint multiuser symbol detection and fading channel estimation for synchronous CDMA systems

, 2001
A novel multiuser code division multiple access (CDMA) receiver based on genetic algorithms is considered, which jointly estimates the transmitted symbols and fading channel coefficients of all the users.
Hanzo, L., Yen, K.
core   +1 more source

UAV-Assisted Network Coded Cooperation by Using Height-Dependency Shaping Parameters in Nakagami-m Faded Channel

IEEE Access
In this paper, we propose a height-dependency shaping parameter ( $m$ ) and a height-dependency path-loss exponent for modelling small-scale Nakagami- $m$ fading and a large-scale path-loss model for unmanned aerial vehicle (UAV)-assisted network coded ...
Pankaj Kumar, Sudhan Majhi
doaj   +1 more source

Performance of the Smart Antenna Aided Generalized Multicarrier DS-CDMA Downlink using both Time-Domain Spreading and Steered Space-Time Spreading

, 2005
In this contribution a generalized MC DS-CDMA system invoking smart antennas for improving the achievable performance in the downlink of the system is studied, which is capable of minimizing the downlink interference inflicted upon co-channel mobiles ...
Yang, L-L., Hanzo, L., Hu, B.
core   +1 more source

Adaptive Pre-Distortion Compensation for LED Nonlinear Distortion in VLC-OFDM Systems Using Frequency Symbol Spreading

Applied Sciences
This paper proposes an adaptive pre-distortion method for mitigating LED nonlinear distortion in Visible Light Communication (VLC)-OFDM systems. The inherent nonlinear characteristics of LEDs disrupt the orthogonality among OFDM subcarriers, causing ...
Koichi Seimiya, Ren Oshima, Geonuk Kang, Chang-Jun Ahn   +3 more
doaj   +1 more source

Appropriate Algorithms for Estimating Frequency-Selective Rician Fading MIMO Channels and Channel Rice Factor: Substantial Benefits of Rician Model and Estimator Tradeoffs

EURASIP Journal on Wireless Communications and Networking, 2010
The training-based channel estimation (TBCE) scheme in multiple-input multiple-output (MIMO) frequency-selective Rician fading channels is investigated.
Shirvani Moghaddam Shahriar, Nooralizadeh Hamid   +1 more
doaj  

Outage analysis and power optimization in uplink and downlink NOMA systems with Rician fading

Results in Engineering
Non-orthogonal multiple access (NOMA) stands as a promising technology with the potential to significantly enhance the performance of forthcoming wireless networks by leveraging its distinctive attributes.
Dipinkrishnan R, Vinoth Babu Kumaravelu
doaj   +1 more source

Achievable Sum Rate Analysis for Moving Relay Assisted Cooperative NOMA System Over Rician Fading Channels

IEEE Access
The number of mobile users on onboard vehicles is increasing continuously. Vehicular users suffer from vehicle penetration loss, fast variation of channel conditions, and signal strengths.
Qazi Saeed Ahmad, Mohd Javed Khan, Imran Ullah Khan, Indrasen Singh, Saif Ahmad, Ghanshyam Singh   +5 more
doaj   +1 more source

Malicious UAV Detection Over Rician Fading Channel: Performance Analysis

IEEE Access
Unmanned aerial vehicles (UAVs) are predicted to be widely used in both military and civilian sectors in the coming years due to their high mobility, low cost, and enhancement of the line-of-sight (LoS) conditions in non-terrestrial networks ...
Yousef Awad, Suhail Ibrahim Al-Dharrab
doaj   +1 more source

Reverse-Link Performance of Synchronous Cellular DS-CDMA Networks in Dispersive Rician Multipath Fading Channels

, 2004
In this paper, the reverse-link performance of synchronous DS-CDMA cellular networks is investigated in Rician multipath fading environments. The system’s performance is evaluated in terms of the achievable average bit error rate (BER) and the user ...
Hwang, S-H., Hanzo, L.
core   +1 more source

Optimum Mode-Switching-Assisted Constant-Power Single- and Multicarrier Adaptive Modulation

, 2003
A set of optimum mode-switching levels is derived for a generic constant-power adaptive-modulation scheme based on a closed-form expression of the average bit error ratio (BER) and the average bits-per-symbol (BPS) throughput of the adaptive-modulation ...
Choi, B.J., Hanzo, L.
core   +1 more source