Evolution of uplink MIMO for LTE-advanced

Park, Chester Sungchung; Wang, Y.-P Eric; Jöngren, George; Hammarwall, D.

doi:10.1109/mcom.2011.5706318

Cited by 54 publications

(33 citation statements)

References 8 publications

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“…One such improvement is a requirement for portable devices to support up to four transmitting antennas operating in the same band [25]. It is generally thought that the extensive existing research on the diversity and space-time coding advantages of multiple antennas can be brought to bear directly to handsets.…”

Section: Sar Constrained System Performance and Codes To Mitigate Sarmentioning

confidence: 99%

SAR codes

Hochwald

Love

Yan

et al. 2013

2013 Information Theory and Applications Workshop (ITA)

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SAR codes are designed for transmission by a portable wireless device to provide high reliability and data rates on a wireless channel, while maintaining low human exposure to electromagnetic radiation. We provide design criteria and examples of SAR codes and show that a 3 dB reduction in exposure is within reach on some devices versus standard single-antenna methods or spacetime codes. This reduction in exposure can be used to boost the transmitted power and extend the usable range of a portable device while maintaining a prescribed exposure level.

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Section: Sar Constrained System Performance and Codes To Mitigate Sarmentioning

confidence: 99%

SAR codes

Hochwald

Love

Yan

et al. 2013

2013 Information Theory and Applications Workshop (ITA)

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“…This enables single-carrier transmission and thus reduces the peakto-average power ratio (PAPR), thereby improving the power amplification efficiency of terminal radios [2]. In order to further enhance the throughput, the 3GPP-LTE agreed upon the use of multiple-input multiple-output (MIMO) transmission schemes for the uplink [3].…”

Section: Introductionmentioning

confidence: 99%

On Soft Decision Value Calculation for Linear-Dispersion Codes with SC-FDMA

Park

2011

IEEE Trans. Wireless Commun.

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The capability of error correction codes is largely dependent on the calculation of soft decision values. In this letter, linear-dispersion (LD) code is applied to single-carrier frequency-division multiple access (SC-FDMA) and the closedform expression of soft decision values is derived. It is shown that the calculation of soft decision values generally depends on both time and space within an SC-FDMA symbol, as opposed to single-antenna transmission. In addition, a sufficient condition to guarantee the independence from time and space is presented. Index Terms-SC-FDMA, DFTS-OFDM, linear dispersion code, MIMO, soft decision value, LLR, MMSE.

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“…In addition, MU-MIMO is enhanced due to the enhancement of the uplink reference signal in LTE-Advanced [81]. An overview of uplink MIMO in LTE-Advanced is presented in [82]. A combination between the collaborative system and the precoded MIMO using a space frequency block codes (SFBC) for the uplink is also proposed in [83].…”

Section: Technical Aspectsmentioning

confidence: 99%

LTE-Advanced Radio Access Enhancements: A Survey

Dehghani

Arshad

MacKenzie

2014

Wireless Pers Commun

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Long Term Evolution Advanced (LTE-Advanced) is the next step in LTE evolution and allows operators to improve network performance and service capabilities through smooth deployment of new techniques and technologies. LTE-Advanced uses some new features on top of the existing LTE standards to provide better user experience and higher throughputs. Some of the most significant features introduced in LTE-Advanced are carrier aggregation, enhancements in heterogeneous networks, coordinated multipoint transmission and reception, enhanced Multiple Input Multiple Output (MIMO) usage and deployment of relay nodes in the radio network. Mentioned features are mainly aimed to enhance the radio access part of the cellular networks. This survey article presents an overview of the key radio access features and functionalities of the LTE-Advanced radio access network, supported by the simulation results. We also provide a detailed review of the literature together with a very rich list of the references for each of the features. An LTE-Advanced roadmap and the latest updates and trends in LTE markets are also presented.

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Evolution of uplink MIMO for LTE-advanced

Cited by 54 publications

References 8 publications

SAR codes

SAR codes

On Soft Decision Value Calculation for Linear-Dispersion Codes with SC-FDMA

LTE-Advanced Radio Access Enhancements: A Survey

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