Performance analysis of multiband OFDM for UWB communication

Snow, C.; Lampe, Lutz; Schober, Robert

doi:10.1109/icc.2005.1494814

Cited by 38 publications

(17 citation statements)

References 12 publications

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“…The elements of h n are well-approximated as zero-mean complex Gaussian random variables [19,20]. This allows us to apply analysis assuming correlated Rayleigh fading coefficients (see Section 3.4) to the UWB channel without lognormal shadowing, and then average over the lognormal shadowing distribution in order to obtain the final system performance over the UWB channel.…”

Section: Channel Modelmentioning

confidence: 99%

Error Rate Analysis for Coded Multicarrier Systems Over Quasi-Static Fading Channels

Snow

Lampe

Schober

2007

IEEE Trans. Commun.

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-Several recent standards such as IEEE 802.11a/g, IEEE 802.16, and ECMA Multiband Orthogonal Frequency Division Multiplexing (MB-OFDM) for high data-rate Ultra-Wideband (UWB), employ bit-interleaved convolutionally-coded multicarrier modulation over quasi-static fading channels. Motivated by the lack of appropriate error rate analysis techniques for this popular type of system and channel model, we present two novel analytical methods for bit error rate (BER) estimation of coded multicarrier systems operating over frequency-selective quasi-static channels with non-ideal interleaving. In the first method, the approximate performance of the system is calculated for each realization of the channel, which is suitable for obtaining the outage BER performance (a common performance measure for e.g. MB-OFDM systems). The second method assumes Rayleigh distributed frequency-domain subcarrier channel gains and knowledge of their correlation matrix, and can be used to directly obtain the average BER performance. Both methods are applicable to convolutionally-coded interleaved multicarrier systems employing Quadrature Amplitude Modulation (QAM), and are also able to account for narrowband interference (modeled as a sum of tone interferers). To illustrate the application of the proposed analysis, both methods are used to study the performance of a tone-interference-impaired MB-OFDM system. Index terms: Error probability, channel coding, quasi-static frequency-selective fading channels, narrowband interference, multiband orthogonal frequency division multiplexing (OFDM), ultra wideband (UWB).

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Section: Channel Modelmentioning

confidence: 99%

Error Rate Analysis for Coded Multicarrier Systems Over Quasi-Static Fading Channels

Snow

Lampe

Schober

2007

IEEE Trans. Commun.

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“…A number of system performances has been published in the literature (see [4], [5], [6]). All the existing work assumed perfect frequency and timing synchronization.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of MB-OFDM UWB System with Imperfect Synchronization and Intersymbol Interference

Lai

Siriwongpairat²,

Liu

2007

2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07

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This paper provides performance analysis ofmultiband OFDM UWB system that takes into consideration the effect of intersymbol interference and imperfect frequency and timing synchronization. The system performance is analyzed under UWB multipath fading channels, as specified in the IEEE 802.15.3a channel standard. Average signal-to-noise ratio is first derived for the system. Then an approximation technique is employed to obtain a closed-form average bit error probability that provides a profound understanding of the performance of the multiband OFDM UWB system. Simulation results validate the theoretical analysis.Index Terms-Ultra-wideband, OFDM, bit error probability, frequency and timing synchronization, intersymbol interference

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“…INTRODUCTION Orthogonal frequency-division multiplexing (OFDM) [1], [2], a multi-carrier modulation technique for high data rate digital communications, has seen its increasingly broader usage in various communication standards. The 802.15.3 Multi-band Ultra Wide Band (MB-UWB) standard has the highest data rates ranging from 200 to 480 Mbps [3]. Fast Fourier Transformation (FFT) and inverse FFT (IFFT) are the most timeconsuming block in a MB-UWB receiver, which requires a throughput rate of more than 409.6 M sample points per second.…”

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confidence: 99%

Design of an application-specific instruction set processor for high-throughput and scalable FFT

Guan

Lin

Fei

2009

2009 Design, Automation &Amp; Test in Europe Conference &Amp; Exhibition

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Abstract-Various Orthogonal Frequency Division Multiplexing (OFDM)-based wireless communication standards have raised more stringent requirements on throughput and flexibility of Fast Fourier Transformation (FFT), a kernel data transformation task in communication systems. Application-specific instruction set processor (ASIP) has emerged as a promising solution to meet these requirements. In this paper, we propose a novel ASIP design tailored for FFT computation. We reconstruct the FFT computation flow into a scalable array structure based on an 8-point butterfly unit (BU). Any-point FFT computation can be carried out in the array structure which can easily expand along both the horizontal and vertical dimensions. We incorporate custom register files to reduce memory access. The data address for custom registers in each FFT stage is changed accordingly, and we derive a regular address changing (AC) rule. With the microarchitecture modifications, we extend the instruction set with three custom instructions correspondingly. Our FFT ASIP implementation achieves great performance improvement over the standard FFT software implementation, one TI DSP processor, and one commercial Xtensa ASIP, with the data throughput improvement as 866.5X, 5.9X, 2.3X, respectively. Meanwhile, the area and power consumption overhead of the custom hardware is negligible.

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Performance analysis of multiband OFDM for UWB communication

Abstract: Abstract-

Cited by 38 publications

References 12 publications

Error Rate Analysis for Coded Multicarrier Systems Over Quasi-Static Fading Channels

Error Rate Analysis for Coded Multicarrier Systems Over Quasi-Static Fading Channels

Performance Analysis of MB-OFDM UWB System with Imperfect Synchronization and Intersymbol Interference

Design of an application-specific instruction set processor for high-throughput and scalable FFT

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