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首页> 外文期刊>International journal of interdisciplinary telecommunications and networking >Uplink Power-Domain Non-Orthogonal Multiple Access (NOMA): Bit Error Rate Performance With Channel Estimation Errors
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Uplink Power-Domain Non-Orthogonal Multiple Access (NOMA): Bit Error Rate Performance With Channel Estimation Errors

机译：上行链路功率域非正交多址（NOMA）：误差率性能具有通道估计错误

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摘要

Non-orthogonal multiple access (NOMA) has been proposed as a promising multiple access (MA) technique in order to meet the requirements for fifth generation (5G) communications and to enhance the performance in internet of things (IoT) networks by enabling massive connectivity, high throughput, and low latency. This paper investigates the bit error rate (BER) performance of two-user uplink power-domain NOMA with a successive interference cancellation (SIC) receiver and taking into account channel estimation errors. The analysis considers two scenarios: perfect (ideal) channel estimation and a channel with estimation errors for various modulations schemes, BPSK, QPSK, and 16-QAM. The simulation results show that, as expected, increasing of the modulation level increases the SIC receiver BER. For example, at a signal-to-noise ratio (SNR) of 5 dB for perfect channel estimation and QPSK modulation, the user that is detected first has a BER of 0.005 compared to 0.14 for the user that is detected with the aid of the SIC receiver. Similarly, the BER of QPSK, assuming 0.25 channel estimation error of user 1, is equal to 0.06 at SNR = 15 dB compared to 0.017 for perfect estimation.
机译：已经提出了非正交多次访问（NOMA）作为有前途的多址（MA）技术，以满足第五代（5G）通信的要求，并通过实现大量连接来增强内容网络（IOT）网络中的性能，高吞吐量和低延迟。本文研究了双用户上行链路功率域NOMA的误码率（BER）性能，具有连续的干扰消除（SIC）接收器，并考虑到频道估计错误。该分析考虑了两种情况：完美（理想）信道估计和具有各种调制方案，BPSK，QPSK和16-QAM的估计误差的频道。仿真结果表明，正如预期的那样，调制水平的增加增加了SIC接收器BER。例如，对于完美的信道估计和QPSK调制，以5 dB的信噪比（SNR），首先检测到的用户的用户为0.005，而借助于用户检测到的用户0.14。 SIC接收器。类似地，假设用户1的0.25信道估计误差的QPSK的BER等于SNR = 15dB的0.06，而有关0.017以获得完美估计。

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