Carrier aggregation for LTE-advanced: design challenges of terminals

“…Aggregation of frequency spectrum is one of the viable techniques for a long-term evolution advanced (LTE-A) network to enhance the peak data rates [2]. Consequently, a new CA scheme has been proposed by 3GPP to achieve bandwidth extension up to 100 MHz to enhance the peak data rates [3].…”

Section: Introductionmentioning

confidence: 99%

Dynamic slot-based carrier scheduling scheme for downlink multimedia traffic over LTE advanced networks with carrier aggregation

Vijayarani¹,

Nithyanandan²

2017

Turk J Elec Eng & Comp Sci

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Abstract:Carrier aggregation (CA) in long-term evolution advanced (LTE-A) networks is a promising tool for providing bandwidth extension for high data rate communication. In CA, the efficient scheduling of carriers has imposed a new challenge in the design of delay-sensitive carrier scheduling for mobile multimedia applications. In this paper, a new dynamic slot-based carrier scheduling scheme has been proposed for efficient resource allocation to support the quality of service (QoS) of mobile traffic over CA transmission. The key idea of this scheduling is the allocation of slots for each component carrier based on the queue state information, taking into consideration the priority based on the delay requirements of individual mobile multimedia traffic. Two different cases of the scheduler with and without priority are implemented to facilitate the performance comparison. The simulation results show that the proposed scheme provides better spectrum utilization, throughput, and delay performance than the existing scheduling scheme and improves delaysensitive mobile traffic QoS.

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“…CA is also the technical solution to overcome spectrum fragmentation, and can be applied to a wide variety of spectrum scenarios [3]. CA has been adopted by the Long-Term Evolution (LTE) standard for cellular systems, and is being extended to Licensed-Assisted Access (LAA) and LTE in Unlicensed spectrum (LTE-U).…”

Section: Introductionmentioning

confidence: 99%

“…The design of the digital baseband is almost invariant to the different CA types. On the other hand, design complexity of radio-frequency transceiver depends heavily on the CA types [3]. Without losing generality, Figure 2 shows two different implementations of the receiver supporting two CA carriers.…”

Section: Introductionmentioning

confidence: 99%

High Performance Receiver Design for RX Carrier Aggregation

Kim

Lee³

et al. 2017

JLPEA

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Abstract:Carrier aggregation is one of the key features to increase the data rate given a scarce bandwidth spectrum. This paper describes the design of a high performance receiver suitable for carrier aggregation in LTE-Advanced and future 5 G standards. The proposed architecture is versatile to support legacy mode (single carrier), inter-band carrier aggregation, and intra-band carrier aggregation. Performance with carrier-aggregation support is as good as legacy receivers. Contradicting requirements of high linearity and the low noise is satisfied with the single-gm receiver architecture in addition to supporting carrier aggregation. The proposed cascode-shutoff low-noise trans-conductance amplifier (LNTA) achieves 57.1 dB voltage gain, 1.76 dB NF (noise figure) , and −6.7 dBm IIP3 (Third-order intercept point) with the power consumption of 21.3 mW in the intra-band carrier aggregation scenario. With legacy mode, the same receiver signal path achieves 56.6 dB voltage gain, 1.33 dB NF, and −6.2 dBm IIP3 with a low power consumption of 7.4 mW.

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Carrier aggregation for LTE-advanced: design challenges of terminals

Cited by 64 publications

References 6 publications

Digital Calibration Based on IQ Mismatch Model for LTE-A CA-Supporting Transceivers

Digital Calibration Based on IQ Mismatch Model for LTE-A CA-Supporting Transceivers

Dynamic slot-based carrier scheduling scheme for downlink multimedia traffic over LTE advanced networks with carrier aggregation

High Performance Receiver Design for RX Carrier Aggregation

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