OFDM TRANSMITTER


An OFDM carrier signal is the sum of a number of orthogonal subcarriers, with baseband data on each subcarrier being independently modulated commonly using some type of quadrature amplitude modulation (QAM) or phase-shift keying (PSK). These signals are then summed to give the transmission signal, .

Orthogonal Frequency Division Multiplexing. (OFDM) is the most promising modulation technique. It has been adopted by most wireless and wired

Realisation of a real-time 12.1 Gb/s optical OFDM transmitter and its application in a 109 Gb/s transmission system with coherent reception
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. Real time O- OFDM transmitter : DSP architecture. Realisation of a real-time 12.1 Gb/s optical OFDM transmitter and its application in a 109 Gb/s transmission system with coherent reception Fred Buchali1, Roman Dischler1, Axel

Transmitter noise effect on the performance of a MIMO- OFDM hardware implementation achieving improved coverage
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This paper presents analysis of performance mea-surements from a MIMO- OFDM IEEE 802.11 n hardware implementation at 5.2 GHz using four transmitters and four receivers. Two spatial multiplexing systems are compared; one which uses a zero-forcing (ZF) detector

Design and implementation of OFDM transmitter and receiver on FPGA hardware
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ABSTRACT Orthogonal Frequency Division Multiplexing ( OFDM ) is a multi-carrier modulation technique which divides the available spectrum into many carriers. OFDM uses the spectrum efficiently compared to FDMA by spacing the channels much closer together

Transmitter architecture for pulsed OFDM
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ABSTRACT A multi-band OFDM UWB system is the leading proposal for the new IEEE 802.15. 3a standard for wireless high bit-rate personal area networks. Pulsed OFDM is an enhancement to the multi-band OFDM system that offers better performance with lower

Flexible baseband transmitter for OFDM
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To fully utilize the available spectrum for a wireless communication system it is feasible to adapt to different situations on the channel. In this paper a flexible OFDM transmitter is presented together with basic theory behind OFDM transmission. It is shown that high

Estimation and correction of transmitter -caused I/Q imbalance in OFDM systems
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In the presented paper a new method of es-timating and correcting transmitter -caused I/Q imbalance in a transmission system based on the WLAN standard IEEE802. 11a is proposed. The estimation process consists of an initial estimation followed by an iterative

FPGA implementation of OFDM transmitter using simulink and xilinx system generator
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Growth in technology has led to unmatched demand for high speed architectures for complex signal processing applications. In 4G wireless communication systems, bandwidth is a precious thing, and service providers are continuously trying to accommodate more no

Low-complexity channel estimation for transmitter diversity OFDM systems
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ABSTRACT Orthogonal Frequency Division Multiplexing ( OFDM ) has recently been proposed for achieving high-bit rate communication required in wireless systems. Transmitter diversity can be used with OFDM system for performance improvement in a

VLSI Implementation of Area-Efficient and Low Power OFDM Transmitter and Receiver
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This paper consists of an analysis of Fast Fourier Transform (FFT) architectures which are the backbone of any OFDM based wireless networks. By using the FFT concepts the authors are indeed in developing an efficient architectures for wireless networks which are common

Implementation of OFDM transmitter and receiver using FPGA
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Orthogonal Frequency Division Multiplexing ( OFDM ) is the most promising modulation technique. It has been adopted by most wireless and wired communication standards. The idea is to utilize a number of carriers, spread regularly over a frequency band, in such a way

Design and Implementation of OFDM transmitter and receiver using 8-point FFT/IFFT
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ABSTRACT Orthogonal Frequency Division Multiplexing ( OFDM ) is a multicarrier system where data bits are encoded to multiple subcarriers, while being sent simultaneously. This results in the optimal usage of bandwidth. A set of orthogonal sub-carriers together forms an

Design Space Exploration of DSP Techniques for Hardware Software Co-Design: An OFDM Transmitter Case Study
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This paper describes the exploration of design parameters for widely used Digital Signal Processing (DSP) algorithms and techniques. In this paper, some of the DSP algorithms and techniques are considered and executed them on soft core processors like General Purpose

Fixed point design and implementation of an OFDM transmitter for etsi satellite digital radio on FPGA platform
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Modern digital communications favor OFDM systems because of their advantages such as spectral efficiency, reduced inter-symbol interference (ISI) and flexibility of deployment across various frequency bands with little modification to the air interface. One of the

Study of FPGA based OFDM transmitter and receiver
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OFDM is a multi-carrier modulation technique with densely spaced sub-carriers that has gained a lot of popularity among the broadband community in the last few years. Orthogonal frequency division multiplexing ( OFDM ) is an established technique for wireless

An Implementation of OFDM Transmitter and Receiver on Reconfigurable Platforms
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Many of the present communication systems tend to use Orthogonal Frequency Division Multiplexing ( OFDM ) because of the higher data rates, low inter symbol interference (ISI) and easily compatible to the variation in the frequency. The present standards use inbuilt

EER architecture specification for C band OFDM transmitter
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This paper presents EER architecture specifications in the case of OFDM C band transmission. The architectures imperfections such as time mismatch and IQ modulator non- ideality are studied. 16 and 64 QAM modulation each in 32 and 128 sub-carriers case are

16APSK/16QAM- OFDM 3.2 Gbps RF signal direct-processing transmitter and receiver communication experiments using WINDS satellite
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Abstract The National Institute of Information and Communications Technology (NICT) has experimented using a 1,244 Mbps high-speed burst modem with single carrier QPSK modulation through a bandwidth of 1.1 GHz transponder on the Wideband InterNetworking

Experimental demonstration of 23.6-Gb/s OFDM with a colorless transmitter
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1 Introduction Lately, orthogonal frequency domain multiplexing ( OFDM ) has received a lot of attention for fiber-optic transmission – . OFDM provides excellent robustness against intersymbol interference and an efficient use of bandwidth as individual subcarriers partly overlap. When

An OFDM Radio Transmitter based on TMS320C6000 DSP for Telemetry Applications
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In this paper the results of the design and the implementation of a new COFDM radio transmitter for telemetry applications in the automotive environment, based on TMS320C6000 DSP is presented. The obtained performance, along with the flexibility of the

Different Approaches for OFDM Transmitter and Receiver Design in Hardware FPGA Design and Implementation with Performance Comparison
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In this paper we investigate performances (bandwidth and speed) that could be obtained using basic logic structures for implementing improved Cooley-Tukey algorithm for IFFT/FFT in transmitter /receiver, as well the approach for implementing OFDM processing unit based