Adaptive modulation and coding (AMC) for bit-interleaved coded OFDM (BIC-OFDM)

Song, Kee-Bong; Ekbal, Amal; Chung, Seong Taek; Cioffi, J.M.

doi:10.1109/icc.2004.1313134

Cited by 41 publications

(60 citation statements)

References 21 publications

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“…This small number of distinct channel gains must not be approximated by the full fading distribution for a valid performance analysis, as would be the case in a fast-fading channel. Recent work has developed a pairwise error probability (PEP) analysis for loaded coded OFDM [10]. However, this analysis assumes the use of a random interleaver, and furthermore the resultant expressions are highly complex and are not amenable to numerical evaluation.…”

Section: Introductionmentioning

confidence: 99%

Error Rate Analysis for Bit-Loaded Coded OFDM

Mohammadnia-Avval

Snow

Lampe

2008

2008 IEEE Wireless Communications and Networking Conference

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Abstract-Bit-loaded Orthogonal Frequency Division Multiplexing (OFDM) with convolutional coding is a powerful technique for transmission over quasi-static frequency-selective fading channels. Motivated by the lack of appropriate error rate analysis techniques for this popular type of system and channel model, we develop a novel analytical method for bit error rate (BER) estimation of bit-loaded coded OFDM systems operating over frequency-selective quasi-static channels with nonideal interleaving. To illustrate the application of the proposed analysis, we compare the performance of a number of OFDM bit-loading schemes applied to Multiband OFDM (MB-OFDM) for Ultra-Wideband (UWB) radio, and to IEEE 802.11a/g systems for wireless local area networks (WLANs). We also propose and evaluate a hybrid loading scheme which selects the best loading for each channel realization from amongst a number of candidates.

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Section: Introductionmentioning

confidence: 99%

Error Rate Analysis for Bit-Loaded Coded OFDM

Mohammadnia-Avval

Snow

Lampe

2008

2008 IEEE Wireless Communications and Networking Conference

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“…The mechanism of allocating power levels and assigning data rates for different subcarriers is referred to as the adaptive bit-loading technique. Based on this technique, various adaptive modulation and coding (AMC) systems were proposed in [4]- [6]. In these systems, feedback links of high data rate are required to provide the transmitter with all the subcarrier gains.…”

Section: Introductionmentioning

confidence: 99%

Power Allocation for Multiband Coded OFDM Systems with Limited Feedback

Nguyen

Choi

et al. 2011

2011 IEEE Vehicular Technology Conference (VTC Fall)

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Abstract-In this paper, we study the power allocation for multiband coded OFDM systems. With limited feedback, we propose an effective power allocation method across OFDM bands to maximize the throughput and achieve the quality of service target. To facilitate the proposed method, two optimization algorithms based on greedy and dynamic programming principles are discussed. The trade-off between performance and complexity is provided. Simulation results show that the proposed power allocation mechanism allows a signal to noise ratio gain of 2 dB at a goodput of 2.5 bit per second per Hz over the multiband OFDM systems with equal power allocation.

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“…By using power optimization adaptive modulation schemes for single user links have been well understood. Their may be two forms bit loading or power loading of the adaptive modulation [4], [5]. If we consider the bit loading, the total number of bits are being distributed across the subcarriers that are being based on the channel state information (CSI).…”

Section: Introductionmentioning

confidence: 99%

Implementation of Cell Zooming Technique to Optimize the Base Station Power

Gundawar¹,

Dorge²,

Gode³

2015

International Journal of Innovative Research in Electrical, Ele

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This paper investigate the problem regarding the minimization of the power of the base station by using the cell zooming technique. In this paper, we mainly focused on reducing the power consumed at the base station end, whereas most of the power minimization related work in the literature today is focused on the mobile end only. Cell zooming is a technology that promises to minimize the resource utilization. This technique is designed to save the energy consumed by the base station by maintaining the quality of services. To understand the working of the cell zooming techniques centralized algorithm is a very basic way. Our simulations shows that the proposed technique can achieve upto 25% reduction in the power consumption over the base station.Keywords: Cell zooming, Traffic load, energy efficiency, base stations, bandwidth utilization, spectral efficiency, orthogonal frequency division multiplexing (OFDM) and power allocation. I.INTRODUCTION As we all know that mobile wireless communication is experiencing a tremendous growth today in terms of both the various number of users as well as the variety of applications coming day by day. As millions of new users are including each and every month. The mobile applications are changing from simple voice applications to data and than to gaming devices. To all of us, the word 'mobile' is very familiar, and its necessary to think much about its operation parts. As we all know that the mobile is very user friendly, that why it is not the case when it came into its operational cost. Communication is the process that should be maintained all the time and each of the base station is designed to operate 24*7 hours. The number of base stations are deployed to the order of tens during the early decades. As most of the users are interested in data transfer rather than the voice transfer and therefore their is an increasing demand of the resources. Inorder to satisfy the users requirements the operator has to work hard as the users requirements are increasing day by day. The basic concepts regarding the cell zooming technique is very clearly explained in [3].

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Adaptive modulation and coding (AMC) for bit-interleaved coded OFDM (BIC-OFDM)

Cited by 41 publications

References 21 publications

Error Rate Analysis for Bit-Loaded Coded OFDM

Error Rate Analysis for Bit-Loaded Coded OFDM

Power Allocation for Multiband Coded OFDM Systems with Limited Feedback

Implementation of Cell Zooming Technique to Optimize the Base Station Power

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