Adaptive Bit-Interleaved Coded OFDM with Reduced Feedback Information

Sung, Chang Kyung; Lee, Inkyu

doi:10.1109/icc.2006.255370

Cited by 15 publications

(21 citation statements)

References 14 publications

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“…These LQA methods include the BER or packet error rate (PER) analysis, which is difficult to carry out with actual channel realization. 2 Recently, there have been extensive studies of theoretical LQA methods for link-adaptation [17], [18], [19], [20], [21]. In [17], BER is calculated based on a log-likelihood ratio (LLR), but it is not given by a parametric function.…”

Section: Related Workmentioning

confidence: 99%

PHY-Supported Frame Aggregation for Wireless Local Area Networks

Shin¹,

Park²,

Kwon³

2013

IEEE Trans. on Mobile Comput.

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An aggregate medium access control (MAC) service data unit (A-MSDU) contains multiple subframes with a single sequence number. Hence, it has a major drawback in environments with high error rates because if any subframes are corrupted, then the entire A-MSDU will be lost. In addition, performance of the A-MSDU depends strongly on the choice of parameters, such as frame size, modulation level, coding rate, and spatial mode. In this paper, a novel link-adaptation mechanism, dubbed physical (PHY)-supported frame aggregation (PSFA), is proposed over IEEE 802.11 networks, and its performance is analyzed. The proposed PSFA technique is based on a cross-layer interaction that enables joint optimization of various parameters between the PHY and MAC layers. This paper derives a new packet error rate (PER) expression for convolutionally coded multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems as an example. Then, this PER expression is used to efficiently estimate the link quality, given the channel conditions and system parameters, and most importantly, it is able to facilitate a parametric study of the cross-layer interaction. In the proposed PSFA algorithm, we present a rule for selecting the parameters so that MAC throughput is maximized. It is shown analytically and verified using Monte Carlo simulations that this choice of parameters can improve throughput performance significantly and also ensure quality of service (QoS) requirements compared to existing conventional algorithms.

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Section: Related Workmentioning

confidence: 99%

PHY-Supported Frame Aggregation for Wireless Local Area Networks

Shin¹,

Park²,

Kwon³

2013

IEEE Trans. on Mobile Comput.

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“…Another approach, which will be considered in this paper, is the data interleaving, which causes performance enhancement of data transmission systems. It is known that data transmission over wireless channels may face severe adverse conditions, especially, burst errors, and thus interleaving becomes an effective means to combat error bursts by converting bursts of errors into random errors [11][12][13]. Chaotic maps can be used to build strong interleavers.…”

Section: Introductionmentioning

confidence: 99%

Continuous Phase Modulation with Chaotic Interleaving for Different OFDM Versions

El-Hamid

Samir

Zekry

et al. 2015

Wireless Pers Commun

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In this paper, we propose a chaotic interleaving scheme for efficient data transmission with continuous-phase modulation orthogonal frequency-division multiplexing (CPM-OFDM) systems over fading channels. The idea of chaotic maps randomization (CMR) is exploited in this scheme. CMR generates permuted sequences from the sequences to be transmitted with lower correlation among their samples, and hence a better symbol error rate (SER) performance can be achieved. The performance of the proposed approach is tested on the conventional Fast fourier transform OFDM (FFT-OFDM), discrete wavelet transform OFDM (DWT-OFDM), and discrete cosine transform OFDM (DCT-OFDM). The proposed (FFT/DCT/DWT)-CPM-OFDM system with interleaving combines the advantages of frequency diversity and power efficiency from CPM-OFDM and performance improvement from chaotic interleaving. The SER performance of the (FFT/DCT/DWT)-CPM-OFDM system with and without chaotic interleaving is evaluated by computer simulations. Also, a comparison between chaotic interleaving and block interleaving is performed. Simulation results show that the chaotic interleaving scheme can greatly improve the performance of (FFT/DCT/DWT)-CPM-OFDM systems. Furthermore, the results show also that, the (FFT/DCT/DWT)-CPM-OFDM system provides a good trade-off between system performance and bandwidth efficiency.

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“…Another approach, which will be considered in this paper, is the data interleaving, which causes performance enhancement of data transmission systems. It is known that data transmission over wireless channels may face severe adverse conditions, especially, burst errors, thus interleaving becomes an effective means to combat error bursts by converting bursts of errors into random errors [7], [8], [9]. Chaotic maps can be used to build strong interleaves.…”

Section: Introductionmentioning

confidence: 99%

FFT/DWT/DCT OFDM channel estimation using EM algorithm in the presence of chaotic interleaving

El-Hamid

El-Henawy

El-Samie

et al. 2012

2012 8th International Computer Engineering Conference (ICENCO)

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This paper presents a newinterleaving scheme for efficient data transmission with Orthogonal Frequency Division Multiplexing (OFDM) over fading channels. This approach is based on the chaotic Baker map. The binary data is interleaved with the proposed approach prior to the modulation step. In addition to improve the system performance in fading channel, the proposed chaotic interleaving approach adds a degree of encryption to the transmitted data. The performance of the proposed approach is tested on the conventional Fast Fourier Transform OFDM (FFT-OFDM), Discrete Wavelet Transform OFDM (DWT-OFDM), and Discrete Cosine Transform OFDM (DCT-OFDM) with and without chaotic interleaving. Expectation-Maximization (EM) algorithm is also proposed to efficiently estimate the channel impulse response (CIR) of such a system operating on a channel with multipath fading. Starting from the Maximum Likelihood (ML) principle, we derive an iterative estimation algorithm based on the (EM) algorithm. This algorithm is capable of improving the channel estimate. In the initialization phase of this iterative algorithm, the initial channel estimate is based on the observation of the pilot carriers only. Then the EM algorithm updates the channel estimates until convergence is reached, the resulting bit error rate essentially coincides with the case of the perfectly known channel. By simulations, the efficiency of these algorithms can be investigated with simulation and the results of estimation will come to a comparison.

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Adaptive Bit-Interleaved Coded OFDM with Reduced Feedback Information

Cited by 15 publications

References 14 publications

PHY-Supported Frame Aggregation for Wireless Local Area Networks

PHY-Supported Frame Aggregation for Wireless Local Area Networks

Continuous Phase Modulation with Chaotic Interleaving for Different OFDM Versions

FFT/DWT/DCT OFDM channel estimation using EM algorithm in the presence of chaotic interleaving

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