EVM considerations for convergent multi-standard cellular base-station transmitters

Kowlgi, Sandeep; Mattheijssen, P.; Berland, Corinne; Ridgers, Tim

doi:10.1109/pimrc.2011.6139832

Cited by 8 publications

(3 citation statements)

References 9 publications

(8 reference statements)

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“…Note that, low phase noise is usually a basic requirement in practical microwave systems. For example, the phase noise requirement in the long-term evolution (LTE) network is ࣘ94 dBc/Hz at 10 KHz [41], [42]. To achieve this through optical heterodyne beating, the two lasers are typically required to possess sub-KHz linewidths [42], [43].…”

Section: System Architecture and Algorithm Designmentioning

confidence: 99%

An Approach to Wideband and High Accuracy Microwave Photonic Signal Carrier Recovery Based on Carrier Period Measurement

Zhu

Cao

et al. 2019

IEEE Photonics J.

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We propose and experimentally demonstrate an approach to carrier frequency and phase recovery of a microwave photonic signal based on carrier period measurement (CPM). In the approach, a coarse carrier frequency offset (CFO) estimation is first performed, which is realized by measuring the crossing period of the microwave signal with its mean level. Then, an envelope detection method is used to simultaneously estimate the residual CFO and the carrier phase. Through the two steps, wideband and high-accuracy carrier recovery can be realized. The proposed approach is validated by an experiment. Effective carrier recovery of a microwave photonic signal is achieved with a carrier frequency varying from 7 to 37 GHz carrying a 2-Gbaud ON-OFF-keying or quadrature phase shift keying baseband signal. The CFO estimation range is from −21 to +9 GHz, and the CFO estimation errors are less than 0.1 MHz.

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Section: System Architecture and Algorithm Designmentioning

confidence: 99%

An Approach to Wideband and High Accuracy Microwave Photonic Signal Carrier Recovery Based on Carrier Period Measurement

Zhu

Cao

et al. 2019

IEEE Photonics J.

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“…Depending on the number of aggregated CCs and CA configuration, different output back-off (OBO) levels at PA are required related to PAPR requirements. To calculate OBO specification, it is normally sufficient to apply 0.01 % complementary cumulative distribution function (CCDF) of the waveform [7]. CCDF characterizes the weighted probability of the signal excursions that lead to distortions, by indicating the number of samples where the signal peak power exceeds its average power by a certain value.…”

Section: Designmentioning

confidence: 99%

A Reconfigurable Dual Band LTE Small Cell RF Front-end/Antenna System to Support Carrier Aggregation

Jouanlanne

Delaveaud

Fernández

et al. 2016

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

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Abstract. In this contribution, the prototype of an energy efficient RF front-end combined to a miniaturized highly efficient antenna system is presented. This demonstrator is designed for LTE small cell base station applications and can address both LTE band 7 & 20. It supports carrier aggregation (CA) for capacity network improvement and is compatible with inter-band CA as well as contiguous and non-contiguous intra-band CA. The measurement results show an energy consumption saving of around 30 % and a size reduction factor of 3 for the antenna system compared to regular base station antennas. The proposed design demonstrates the possibility of increasing the energy efficiency as well as the level of integration of a small cell base station despite the use of new technology enablers such as CA technique.

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“…Error vector magnitude (EVM) is a widely used figure of merit in literatures [7], [24] and standards [25] to quantify the in-band distortions, which is defined as…”

Section: B Simple Clippingmentioning

confidence: 99%

PAPR reduction for bit-loaded OFDM in visible light communications

Ying

Baxley³

et al. 2015

2015 IEEE Wireless Communications and Networking Conference (WCNC)

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Visible light communications (VLC) rely on white light emitting diodes (LEDs) to provide communication and illumination simultaneously. Orthogonal frequency division multiplexing (OFDM) enables bit loading in VLC to make the best use of available modulation bandwidth of white LEDs. However, OFDM signals in VLC exhibit high peak-to-average power ratio (PAPR) as in radio frequency (RF) communications. VLC-OFDM differs from RF-OFDM in that the baseband signals are realvalued and there are two PAPRs to be reduced, namely upper PAPR and lower PAPR. Moreover, upper PAPR and lower PAPR are not independently distributed, and are often subject to asymmetric constraints. In this paper, we propose a distortionbased PAPR reduction scheme to minimize the weighted upper PAPR and lower PAPR in VLC-OFDM. The proposed method takes bit loading into consideration that ensures allocating less distortions to subcarriers with more bits loaded (higher order constellations).

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EVM considerations for convergent multi-standard cellular base-station transmitters

Cited by 8 publications

References 9 publications

An Approach to Wideband and High Accuracy Microwave Photonic Signal Carrier Recovery Based on Carrier Period Measurement

An Approach to Wideband and High Accuracy Microwave Photonic Signal Carrier Recovery Based on Carrier Period Measurement

A Reconfigurable Dual Band LTE Small Cell RF Front-end/Antenna System to Support Carrier Aggregation

PAPR reduction for bit-loaded OFDM in visible light communications

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