Adaptive modulation and coding techniques for OFDMA systems

Fantacci, R.; Marabissi, Dania; Tarchi, Daniele; Habib, I.

doi:10.1109/twc.2009.090253

Cited by 81 publications

(48 citation statements)

References 12 publications

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“…As shown in Figure 1, users who are located near the eNodeB receive the transmitted data at high bit rate using 64QAM, while cell edge users receive the transmitted data at low bit. This is in order to maintain the connection quality and link stability without the need to increase the transmission power (Fantacci et al, 2009;Cohen et al, 2010).…”

Section: Adaptive Modulation and Codingmentioning

confidence: 99%

Adaptive modulation and coding selection mechanisms for single-cell LTE broadcasting in enterprise network

Algharem¹,

Omar²,

Stiawan

et al. 2018

IJDET

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LTE broadcast or evolved multimedia broadcast multicast service (eMBMS) enables operators to efficiently launch media services over LTE to meet mobile users' demand on multimedia services. This paper introduces two mechanisms that use the standard deviation (StD) of eMBMS user's modulation and coding scheme (MCS) level group operated on single cell mode to select its optimal MCS level efficiently. Typically, MCS level is selected on the basis of users' worst channel condition, which results in wasting network resources. Since the eMBMS performance directly depends on the selected MCS level, an efficient adaptive modulation and coding (AMC) scheme is essentially needed. The proposed mechanisms are simulated using LTE simulator, and the results show that the proposed mechanisms increase the eMBMS performance in terms of throughput, delay and packet loss ratio, compared to the worst channel gain and averaging mechanisms.Keywords: enterprise networks; LTE; evolved Multimedia Broadcast Multicast Service; eMBMS; modulation and coding scheme; MCS; spectrum efficiency; adaptive modulation and coding; AMC. Adaptive modulation and coding selection mechanisms for single-cell LTE 61Reference to this paper should be made as follows: Algharem, M., Omar, M.H., Stiawan, D., Aldmour, I. and Budiarto, R. (2018) 'Adaptive modulation and coding selection mechanisms for single-cell LTE broadcasting in enterprise network', Int.

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Section: Adaptive Modulation and Codingmentioning

confidence: 99%

Adaptive modulation and coding selection mechanisms for single-cell LTE broadcasting in enterprise network

Algharem¹,

Omar²,

Stiawan

et al. 2018

IJDET

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“…From the requested data rate and the selected modulation technique, the number of RB (Resource Blocks) required for a UE can be determined [2]. However, automatic modulation and coding (AMC), when allocating RB, does not take into account (i) the processing capability of a UE, and (ii) the unpredictable channel quality.…”

Section: Introductionmentioning

confidence: 99%

A Dynamic Allocation Scheme for Resource Blocks Using ARQ Status Reports in LTE Networks

Sheu¹,

Chang²,

Yeh³

2018

Adv Comput Sci

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This paper presents a Dynamic RB (Resource Blocks) Allocation (DRBA) in LTE (LongTerm Evolution) networks by utilizing Automatic Repeated Request (ARQ). From the ARQ status report, an Evolved-Node Base Station (eNodeB) computes the successfully received packets per unit time for each User Equipment (UE). Thus, an eNB can adequately allocate Resource Blocks (RB) for a UE. In DRBA, we consider three different traffic types (audio, video, and data) with the priority from the highest to the lowest. To prevent the starvation of data traffic, we set an upper bound of RBs for audio and video traffic. To demonstrate the superiority of DRBA, we perform NS-3 simulation. Simulation results show that DRBA can perform much better than the traditional Automatic Modulation and Coding (AMC) scheme. In particular, when a UE is in high interference/noise environment, DRBA can achieve higher utilization, lower blocking rate, and admit more successfully connected UE.

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“…OFDMA (orthogonal frequency division multiple access) [6] associated with adaptive modulation and coding (AMC) techniques [7] to enhance throughput [8], spectral efficiency [9] and BER performance of wireless communication system by adjusting transmission parameters like modulation code-rates [10] and power on the basis of the channel state adaptively. When adaptive transmission [11] is employed in OFDM system, the transmission parameters of every subcarrier are adapted to each subchannel.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Modulation and Coding with Channel State Information in OFDM for WiMAX

Reddy¹,

Boppana²

2014

IJIGSP

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Abstract-WiMAXis a broadband wireless communication system which provides fixed as well as mobility services. The mobile-WiMAX offers a special feature that has adopted an adaptive modulation and coding (AMC) in OFDM to provide higher data rates and error free transmission. AMC technique employs the channel state information (CSI) to efficiently utilize the channel and maximize the throughput with better spectral efficiency. In this paper, LSE, MMSE, LMMSE, Low rank (Lr)-LMMSE channel estimators are integrated with the physical layer. The performance of estimation algorithms is analyzed in terms of BER, SNR, MSE and throughput. Simulation results proved that increment in modulation scheme size causes to improvement in throughput along with BER value. There is a trade-off among modulation size, BER value and throughput.

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Adaptive modulation and coding techniques for OFDMA systems

Cited by 81 publications

References 12 publications

Adaptive modulation and coding selection mechanisms for single-cell LTE broadcasting in enterprise network

Adaptive modulation and coding selection mechanisms for single-cell LTE broadcasting in enterprise network

A Dynamic Allocation Scheme for Resource Blocks Using ARQ Status Reports in LTE Networks

Adaptive Modulation and Coding with Channel State Information in OFDM for WiMAX

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