5G New Radio UL Coverage with Peak Clipping

Toni Levanen, J. Kaikkonen, Sari Nielsen, K. Pajukoski, M. Renfors, M. Valkama
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引用次数: 2

Abstract

For the 5G new radio physical layer the CP-OFDM waveform has been chosen as the baseline for communications below 40 GHz. The requirement for multicarrier waveforms used for uplink is to achieve similar coverage as achieved by SC-FDMA in LTE uplink. In this paper, multiple candidate waveforms with enhanced CP-OFDM processing proposed for 5G incorporating realistic 3GPP compliant power amplifier model and peak clipping are evaluated in uplink transmission, and compared against SC-FDMA in terms of maximum average power amplifier output power and coded block error rate. It is shown that multicarrier waveforms have minor disadvantage in single-PRB transmission, but as the allocation size increases to encounter frequency selective fading the multicarrier waveforms provide similar or even improved link budget compared to SC-FDMA uplink. This implies that given the expected cell edge throughput requirements for 5G mobile broadband services and expected power amplifier development, enhanced CP-OFDM waveforms can achieve the uplink coverage requirement.
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5G新无线电UL覆盖与峰值裁剪
对于5G新无线电物理层,CP-OFDM波形已被选为40 GHz以下通信的基线。上行链路所使用的多载波波形要求达到与LTE上行链路中SC-FDMA相似的覆盖范围。本文在上行传输中评估了基于现实3GPP兼容功率放大器模型和峰值裁剪的5G增强CP-OFDM处理的多个候选波形,并在最大平均功率放大器输出功率和编码块错误率方面与SC-FDMA进行了比较。研究表明,多载波波形在单prb传输中有较小的缺点,但随着分配规模的增加,多载波波形与SC-FDMA上行链路相比,可以提供类似甚至更好的链路预算。这意味着,考虑到5G移动宽带业务的预期小区边缘吞吐量需求和预期功率放大器的发展,增强的CP-OFDM波形可以实现上行覆盖需求。
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