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- Orthogonal Frequency Division Multiplexing (OFDM)
- OFDM is a promising candidate for achieving high data rate transmission in mobile environment. The application of OFDM to high data rate mobile communication system is being investigated by many researchers. Also the introduction of Digital Audio Broadcasting DAB based on OFDM, successful test on OFDM for Digital Television Terrestrial...
- Tags: OFDM, Wireless
- White papers 2001-05-22
- M-QAM OFDM and PCC-OFDM Performance in the Presence of Phase Noise
- This paper addresses the issue of OFDM and PCC-OFDM systems impaired by phase noise PN. PCC-OFDM is a variation of OFDM in which data is mapped onto adjacent subcarrier pairs. As a result intercarrier interference ICI in adjacent subcarriers is cancelled. Phase noise in OFDM causes both ICI and common...
- Tags: Monash University, PCC-OFDM Performance, OFDM, Wireless
- White papers 2003-11-10
- Design and Simulation of Orthogonal Frequency Division Multiplexing (OFDM) Signaling
- A MATLAB program has been written to investigate Orthogonal Frequency Division Multiplexing OFDM communication systems. This program is valuable for future researchers simulating systems that are too theoretically complex to analyze. Single carrier QAM and multicarrier OFDM are compared to demonstrate the strength of OFDM in multipath channels. Two graphical...
- Tags: MATLAB Program, OFDM, Wireless
- White papers 2001-05-15
- OFDM for Mobile Data Communications
- This paper describes Orthogonal Frequency Division Multiplexing OFDM and its application to mobile communications. OFDM is a modulation and multiple access technique that has been explored for over 20 years. Only recently has it been finding its way into commercial communications systems, as Moore’s Law has driven down the cost...
- Tags: Mobile, Flarion Technologies Inc., OFDM, Wireless
- White papers 2003-03-01
- OFDM
- blog rootOFDM SimulationDo you think OFDM Transmitter/Receiver simulation is possible in MATLAB?
- Tags: cherianpperumal@..., OFDM
- Discussion threads 2006-04-01
- Design of Robust Pulses to Carrier Frequency Offset for OFDM/OQAM System
- The high sensitivity to carrier frequency offset of OFDM systems compared to single carrier systems is well known. This paper studies how this can be remedied for OFDM/OQAM systems by appropriate pulse shaping. Building on earlier methods for minimizing out-of-band energy, a procedure for pulse shape design is derived. The...
- Tags: Pulse, OFDM, Wireless
- White papers 2005-07-12
- Implementation of OFDM Into Broadband Wireless Networks
- In recent time new broadband wireless technologies such as Wifi and WiMAX emerged on the world markets. Due to its many advantages, OFDM has become the modern choice for these systems. This paper describes fundamental principles of OFDM and analyses its advantages and drawbacks. The paper further introduces multiple access...
- Tags: Network, Broadband Wireless, Broadband, Wireless Network, OFDM, Broadband Internet, Telecommunications, Wireless
- White papers 2006-09-06
- Multisubchannel Detection Techniques for Mobile OFDM Systems
- One of the critical problems of mobile OFDM systems is the loss of the subchannels' orthogonality, if the channel impulse response changes during one OFDM block. OFDM systems experience intersubchannel interference in mobile receivers if the channel impulse response changes significantly during one OFDM block. This paper presents the mathematical...
- Tags: Technique, Mobile, OFDM, Advertising & Promotion, Wireless, Marketing
- White papers
- Orthogonal Frequency Division Multiplexing for Wireless Communications
- Orthogonal frequency division multiplexing OFDM is a promising technique for high-data-rate wireless communications because it can combat inter-symbol interference ISI caused by the dispersive fading of wireless channels. The proposed research focuses on techniques that improve the performance of OFDM based wireless communications and its commercial and military applications. In...
- Tags: Wireless Communication, OFDM, Wi-Fi, Wireless
- White papers 2004-11-16
- Constant Envelope Binary OFDM Phase Modulation
- In this paper a new approach is presented to alleviate the undesirable effects due to the high peak-to-average power ratio of orthogonal frequency division multiplexing. A class of signaling called OFDM angle modulation is presented. These constant envelope OFDM based signals guarantee a 0dB PAPR thus are well suited for...
- Tags: OFDM, Wireless
- White papers
- Noise Plus Interference Power Estimation in Adaptive OFDM Systems
- Noise variance and Signal-To-Noise Ratio SNR are important parameters for adaptive Orthogonal Frequency Division Multiplexing OFDM systems since they serve as a standard measure of signal quality. Conventional algorithms assume that the noise statistics remain constant over the OFDM frequency band, and thereby average the instantaneous noise samples to get...
- Tags: Noise, OFDM, Wireless
- White papers 2005-01-28
- The Peak Factor of a 16-QAM/OFDM System
- The close relationship between the peak factor of a QPSK/OFDM system and the one from a 16-QAM/OFDM system is presented and analyzed. It is shown that a 16- QAM/OFDM system shows larger peaks and is more difficult to analyze unless use is made of some results that relate both schemes...
- Tags: University Of New South Wales
- White papers 2006-02-22
- The Principles of OFDM
- The principles of orthogonal frequency division multiplexing OFDM modulation have been in existence for several decades. However, in recent years these techniques have quickly moved out of textbooks and research laboratories and into practice in modern communications systems. The techniques are employed in data delivery systems over the phone line,...
- Tags: Technique, OFDM, Productivity, Wireless
- White papers 2001-01-01
- A Pseudorandom Postfix OFDM Modulator - Semi-Blind Channel Estimation and Equalization
- This paper details a new Orthogonal-Frequency-Division-Multiplexing OFDM modulator based on the use of a PseudoRandom Postfix PRP-OFDM and discusses low-complexity equalization and channel estimation/tracking architectures. The main property of this new modulation scheme is the ability to estimate and track the channel variations semi-blindly using order-one statistics of the received...
- Tags: IEEE, OFDM, Wireless
- White papers 2006-03-01
- FPGA-Based Design of a Pulsed-OFDM System
- An enhancement to the Multi-Band Orthogonal Frequency Division Multiplexing (MB-OFDM) system, known as Pulsed-OFDM, has been proposed to reduce the complexity and power consumption of the transceiver without sacrificing performance. This paper describes the detailed FPGA implementation of a complete Pulsed-OFDM transceiver. The resource requirements are given for each of...
- Tags: Transceiver, IEEE, FPGA
- White papers 2006-01-01
- Exploiting Time Diversity to Improve Block Spread OFDM
- This paper presents a new method to improve on block spread OFDM by exploiting time diversity to ensure that the blocks are independent and uncorrelated. Simulation results have shown significant improvement over conventional OFDM and Block Spread OFDM. A method used to implement mutually orthogonal signals is called Orthogonal Frequency...
- Tags: Carrier, OFDM, Wireless
- White papers 2006-02-15
- Rapid MIMO-OFDM Software Defined Radio System Prototyping
- Multiple Input-Multiple Output MIMO is an attractive technology for future wireless systems. MIMO communication, enabled by the use of multiple transmit and multiple receive antennas, is known for its high spectral efficiency as well as its robustness against fading and interference. Combining MIMO with Orthogonal Frequency Division Multiplexing OFDM, it...
- Tags: Radio, MIMO, MIMO-OFDM, OFDM, Wireless
- White papers 2006-06-20
- An OFDM-TDMA/SA MAC Protocol With QoS Constraints for Broadband Wireless LANs
- Orthogonal Frequency Division Multiplexing OFDM is an important technique to support high speed transmission of broadband traffic in wireless networks, especially broadband wireless Local Area Networks LANs. Based on OFDM, a new multiple access scheme, called OFDM-TDMA with subcarrier allocation (OFDMTDMA/ SA), is introduced in this paper. It provides more...
- Tags: QoS, Broadband Wireless, Broadband, WLAN, OFDMA, Broadband Internet, OFDM, Network Technology, Telecommunications, LANs, Wireless, Networking
- White papers
- OFDM
- I would like to know your opinion about the including of OFDM in the Spread spectrum Family.Thanks
- Tags: sbalan@..., OFDM
- Discussion threads 2007-07-25
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