Data Transmission by Frequency-Division Multiplexing Using the Discrete Fourier Transform

Weinstein, Stephen B.; Ebert, P. M.

doi:10.1109/tcom.1971.1090705

Cited by 1,757 publications

(650 citation statements)

References 6 publications

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“…When sampled with sampling frequency , the complex envelope of the OFDM signal can be obtained by an inverse Discrete Fourier Transform [12] of the complex data sequence (where is the time index and is the sub-carrier index):…”

Section: Orthogonal Frequency Division Multiplexing (Ofdm)mentioning

confidence: 99%

“…The demultiplexing process can be accomplished by means of a Discrete Fourier Transform in the receiver [12], which guarantees orthogonallity and simplifies the design.…”

Section: Orthogonal Frequency Division Multiplexing (Ofdm)mentioning

confidence: 99%

“…The advantages of this parallel data transmission with several sub-channels carrying low rate information were suggested by S. B. Weinstein and P. M. Ebert in 1971 [12] and later by L. J. Cimini in 1985 [10]. Because each sub-channel covers only a small portion of the whole bandwidth, equalization is potentially easier than in serial transmission systems, and it can take advantage of the inclusion of pilot sub-carriers in the frame [10].…”

Section: Orthogonal Frequency Division Multiplexing (Ofdm)mentioning

confidence: 99%

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Understanding the effects of phase noise in orthogonal frequency division multiplexing (OFDM)

Armada

2001

IEEE Trans. on Broadcast.

302

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Abstract-Phase noise must be carefully considered when designing an OFDM-based communication system since an accurate prediction of the tolerable phase noise can allow the system and RF engineers to relax specifications. This paper analyzes the performance of OFDM systems under phase noise and its dependence on the number of sub-carriers both in the presence and absence of a phase correction mechanism. Besides some practical results are provided so as to give some insight into the phase noise spectral specifications that should be required to the local oscillator.

show abstract

Section: Orthogonal Frequency Division Multiplexing (Ofdm)mentioning

confidence: 99%

“…The demultiplexing process can be accomplished by means of a Discrete Fourier Transform in the receiver [12], which guarantees orthogonallity and simplifies the design.…”

Section: Orthogonal Frequency Division Multiplexing (Ofdm)mentioning

confidence: 99%

Section: Orthogonal Frequency Division Multiplexing (Ofdm)mentioning

confidence: 99%

See 1 more Smart Citation

Understanding the effects of phase noise in orthogonal frequency division multiplexing (OFDM)

Armada

2001

IEEE Trans. on Broadcast.

302

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“…At the receiver side, after down-conversion and analog-to-digital conversion (ADC), FFT is employed to demodulate the original signal. Among the aforementioned procedures, IFFT and FFT are the key parts of OFDM system ever since OFDM was first proposed by Weinstein and Ebert [4] in 1970s and applied in practice.…”

Section: Introductionmentioning

confidence: 99%

Novel Low-complexity OFDM Transmitter Without IFFT and Multiplier

Liu¹,

Yang²,

Luo³

et al. 2017

dtetr

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Traditional orthogonal frequency division multiplexing (OFDM) transmitter is implemented by exploiting inverse fast Fourier transform (IFFT), up-sampling, and low pass shaping filter (LPSF) modules, which occupy a large number of hardware resources and severely lower down the operation speed. To address these limitations, we propose a novel OFDM transmitter architecture, by which the aforementioned modules can be discarded and replaced with some simple switches. In the proposed architecture, direct digital synthesis (DDS) method is employed to generate digital sub-carriers and to transform OFDM data from frequency domain to time domain. Through some sophisticated simplifications, the proposed architecture can avoid using multipliers and remarkably save hardware resources. Finally, comparative experiments are carried out on field programmable gate array (FPGA) platform which demonstrates that our DDS-based architecture saves more than half of the hardware resources and doubles the achievable maximum frequency compared with traditional structure.

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“…The application of the Jacobi algorithm in ISI channels is discussed in Section II, and is extended to turbo equalization in a coded system in Section III. The simulation and analytical results of the proposed turbo equalization algorithm are shown; the performance and complexity of the proposed turbo equalization scheme are compared with some existing filter based schemes as well as OFDM [7], [8] solution and single-carrier frequency domain equalization (SC-FDE) [8], [9] in Section IV. Conclusions are drawn in Section V. The performance bound for the proposed equalization, turbo equalization are theoretically analyzed in Section II-C, III-B, respectively.…”

Section: Introductionmentioning

confidence: 99%

Application of Jacobi algorithm for ISI channels

Xiao

Sellathurai

2009

IET Signal Process.

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In this paper, we apply the Jacobi iterative algorithm to combat intersymbol interference (ISI) caused by frequency selective channels. The performance bound of the equalizer is analyzed in order to gain an insight into its asymptotic behavior. Due to the error propagation problem, the potential of this algorithm is not reached in an uncoded system. However, its extension to a coded system with the application of the turbo processing principle results in a new turbo equalization algorithm which demonstrates comparable performance with reduced complexity compared to some existing filter based turbo equalization schemes; and superior performance compared to some frequency domain solutions, such as orthogonal frequency division multiplexing (OFDM) and single-carrier frequency domain equalization (SC-FDE).

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Data Transmission by Frequency-Division Multiplexing Using the Discrete Fourier Transform

Cited by 1,757 publications

References 6 publications

Understanding the effects of phase noise in orthogonal frequency division multiplexing (OFDM)

Understanding the effects of phase noise in orthogonal frequency division multiplexing (OFDM)

Novel Low-complexity OFDM Transmitter Without IFFT and Multiplier

Application of Jacobi algorithm for ISI channels

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