Keywords = OFDM
Number of Articles: 10
Image encryption based on s-box and 3D-chaotic maps and secure image transmission through ofdm in rayleigh fading channel
Volume 42, Issue 2 , February 2024, , Page 288-297
Abstract
Data security is vital if transferred over a wireless network or stored on a personal computer. The essential properties of chaos, such as initial state sensitivity and unpredictability, ... Read More ...
A Proposed Channel Estimation Based on Enhanced Sub-carrier Index Modulation and Packet-Discrete Wavelet Transform to Minimize Bit Error Rate
Volume 39, Issue 10 , October 2021, , Page 1506-1513
Abstract
For Orthogonal Frequency Division Multiplexing (OFDM) and other communication systems, many estimating approaches have been developed to estimate the channel state information and lower ... Read More ...
High Rate Data Processing System of 6x6 MIMO_OFDM Using FPGA Technique with Spatial Algorithm
Volume 36, 7A , July 2018, , Page 723-732
Abstract
OFDM has high spectral Performance and pliability in multipath channel effects while MIMO use another strategy for saving power of transmitter by using multi in multi out antennas to ... Read More ...
Comparison of FFT-Based and DCT-Based Channel Estimation and ECC for OFDM System
Volume 33, 3A , April 2015, , Page 682-693
Abstract
Orthogonal Frequency Division Multiplexing (OFDM) has become a popular modulation method for high data rate wireless communications. In this paper, two schemes are proposed. In the ... Read More ...
Low Complexity Spectrum Sensing System for GFDM Cognitive Radio Signals
Volume 32, Issue 6 , July 2014, , Page 1506-1518
Abstract
Cognitive radio is a promising technology that aims to use the transmission spectrum efficiently. Each cognitive transmission process consists typically of two phases. During the first ... Read More ...
OFDM Channel Estimation Based on Intelligent Systems
Volume 32, Issue 2 , February 2014, , Page 305-324
Abstract
This work is dedicated to the study of reducing Bit Error Rate (BER) when transferring data in the system Orthogonal Frequency Division Multiplexing (OFDM) by estimating the carrier ... Read More ...
Design and Implementation of MC-CDMA Technique Using FPGA
Volume 31, Issue 11 , July 2013, , Page 2085-2097
Abstract
Multicarrier Code Division Multiple Access (MC-CDMA) is attractive technique for high speed wireless data transmission; it's a combination of Orthogonal Frequency Division Multiplexing ... Read More ...
Performance Evaluation of Dual Tree Complex Wavelet Packet Modulation (Dt-Cwpm) System Over Multipath Rayleigh Fading Channel
Volume 31, 5 A , May 2013, , Page 992-1010
Abstract
The effectiveness of Dual Tree Complex Wavelet Packet Modulation (DT-CWPM) with DQPSK modulation is investigated for communication over flat and frequency selective Rayleigh fading ... Read More ...
Proposed Combined PTS with Clipping and Filtering Technique for PAPR Reduction in OFDM System
Volume 30, Issue 12 , July 2012, , Page 2125-2137
Abstract
One of the major drawbacks of OFDM is high Peak-to-Average Power Ratio(PAPR) which can result in poor power efficiency and serious distortion in the transmitter amplifier. In this paper, ... Read More ...
Adaptive Modulation for Orthogonal Frequency Division Multiplexing
Volume 30, Issue 9 , May 2012, , Page 1611-1624