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Ionizing radiation effect on single event upset sensitivity of ferroelectric random access memory
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作者 魏佳男 郭红霞 +5 位作者 张凤祁 罗尹虹 丁李利 潘霄宇 张阳 刘玉辉 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第9期329-334,共6页
The impact of ionizing radiation effect on single event upset(SEU) sensitivity of ferroelectric random access memory(FRAM) is studied in this work. The test specimens were firstly subjected to ^60Co γ-ray and the... The impact of ionizing radiation effect on single event upset(SEU) sensitivity of ferroelectric random access memory(FRAM) is studied in this work. The test specimens were firstly subjected to ^60Co γ-ray and then the SEU evaluation was conducted using ^209Bi ions. As a result of TID-induced fatigue-like and imprint-like phenomena of the ferroelectric material, the SEU cross sections of the post-irradiated devices shift substantially. Different trends of SEU cross section with elevated dose were also found, depending on whether the same or complementary test pattern was employed during the TID exposure and the SEU measurement. 展开更多
关键词 ferroelectric random access memory ionizing radiation effect single event upset
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Pattern dependence in synergistic effects of total dose on single-event upset hardness 被引量:1
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作者 郭红霞 丁李利 +4 位作者 肖尧 张凤祁 罗尹虹 赵雯 王园明 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第9期463-467,共5页
The pattern dependence in synergistic effects was studied in a 0.18 μm static random access memory(SRAM) circuit.Experiments were performed under two SEU test environments:3 Me V protons and heavy ions.Measured re... The pattern dependence in synergistic effects was studied in a 0.18 μm static random access memory(SRAM) circuit.Experiments were performed under two SEU test environments:3 Me V protons and heavy ions.Measured results show different trends.In heavy ion SEU test,the degradation in the peripheral circuitry also existed because the measured SEU cross section decreased regardless of the patterns written to the SRAM array.TCAD simulation was performed.TIDinduced degradation in n MOSFETs mainly induced the imprint effect in the SRAM cell,which is consistent with the measured results under the proton environment,but cannot explain the phenomena observed under heavy ion environment.A possible explanation could be the contribution from the radiation-induced GIDL in pMOSFETs. 展开更多
关键词 pattern dependence total dose single event upset(SEU) static random access memory(SRAM)
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Walsh Hadamard Transform Based Transceiver Design for SC-FDMA with Discrete Wavelet Transform 被引量:2
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作者 Arsla Khan Amna Arif +1 位作者 Tabassum Nawaz Sobia Baig 《China Communications》 SCIE CSCD 2017年第5期193-206,共14页
This article proposes a new transceiver design for Single carrier frequency division multiple access(SCFDMA)system based on discrete wavelet transform(DWT). SCFDMA offers almost same structure as Orthogonal frequency ... This article proposes a new transceiver design for Single carrier frequency division multiple access(SCFDMA)system based on discrete wavelet transform(DWT). SCFDMA offers almost same structure as Orthogonal frequency division multiple access(OFDMA)with extra advantage of low Peak to Average Power Ratio(PAPR). Moreover,this article also suggests the application of Walsh Hadamard transform(WHT)for linear precoding(LP)to improve the PAPR performance of the system. Supremacy of the proposed transceiver over conventional Fast Fourier transform(FFT)based SCFDMA is shown through simulated results in terms of PAPR,spectral efficiency(SE)and bit error rate(BER). 展开更多
关键词 multicarrier modulation orthogonal frequency division multiple access single carrier frequency division multiple access fast Fourier transform discrete wavelet transform Walsh Hadamard transform
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Utility-optimization dynamic subcarrier allocation algorithm for SC-FDMA systems
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作者 李一兵 Zhang Xu Ye Fang 《High Technology Letters》 EI CAS 2014年第1期1-8,共8页
Two utility-optimization dynamic subcarrier allocation(DSA) algorithms are designed for single carrier frequency division multiple access system(SC-FDMA).The two proposed algorithms aim to support diverse transmission... Two utility-optimization dynamic subcarrier allocation(DSA) algorithms are designed for single carrier frequency division multiple access system(SC-FDMA).The two proposed algorithms aim to support diverse transmission capacity requirements in wireless networks,which consider both the channel state information(CSI) and the capacity requirements of each user by setting appropriate utility functions.Simulation results show that with considerable lower computational complexity,the first utility-optimization algorithm can meet the system capacity requirements of each user effectively.However,the rate-sum capacity performance is poor.Furthermore,the second proposed utility-optimization algorithm can contribute a better trade-off between system rate-sum capacity requirement and the capacity requirements of each user by introducing the signal to noise ratio(SNR) information to the utility function based on the first utility-optimization algorithm,which can improve the user requirements processing capability as well as achieve a better sum-rate capacity. 展开更多
关键词 single carrier frequency division multiple access (SC-FDMA) dynamic subcarri-er allocation (DSA) utility function transmission capacity requirements utility-optimization algo-rithm greedy algorithm proportional fair algorithm
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Performance analysis of DFT spread generalized multi-carrier systems 被引量:2
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作者 LI MingQi ZHANG XiaoDong 《Science in China(Series F)》 2009年第12期2385-2396,共12页
Discrete Fourier transform-spread generalized multi-carrier (DFT-S-GMC) based single carrier-frequency division multiple access (SC-FDMA) scheme is a promising solution for uplink transmission of broadband wireles... Discrete Fourier transform-spread generalized multi-carrier (DFT-S-GMC) based single carrier-frequency division multiple access (SC-FDMA) scheme is a promising solution for uplink transmission of broadband wireless communication. In this paper, the impact of non-perfect orthogonal prototype filter to the performance of the DFT-S-GMC system is discussed. Single sub-band frequency-domain equalization (FDE) method is presented and the performance loss caused by FDE-tone discarding is analyzed. Moreover, the post-processing signal to interference plus noise ratio (SINR) of DFT-S-GMC receiver over multi-path channel is addressed. The theoretical analysis illustrates that the non-perfect orthogonal prototype filter results in inter-symbol interference (ISI) and inter-sub-band interference (IBI), and the variance of the ISI is still less than le-4 and much larger than that of IBI. By designing proper system parameters, the reconstruction error due to FDE-tones discarding can be controlled under -40 dB; the post-processing SINR of the DFT-S-GMC receiver with minimum mean square error (MMSE) equalization is higher than that with zero forcing (ZF) equalization. The theoretical performances are verified by extensive simulation results. 展开更多
关键词 filter-bank single carrier-frequency division multiple access generalized multi-carrier frequency domain equalization performance analysis
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Towards Qo E-based resource allocation schemes in SC-FDMA systems
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作者 Hu Yahui Liu Yinlong +1 位作者 Zhou Xu Xu Zhen 《The Journal of China Universities of Posts and Telecommunications》 EI CSCD 2015年第5期63-70 100,100,共9页
One of the critical techniques of quality of experience(Qo E) provisioning in single carrier frequency division multiple access(SC-FDMA) systems is related to implementation of efficient radio resource allocation(RRA)... One of the critical techniques of quality of experience(Qo E) provisioning in single carrier frequency division multiple access(SC-FDMA) systems is related to implementation of efficient radio resource allocation(RRA) schemes. So far as we know, Qo E-based RRA in SC-FDMA systems is still an open issue. Therefore, in this paper, five different Qo E-based RRA schemes in SC-FDMA system are investigated based on different criteria. The first three Qo E criteria applied in other wireless systems are maximizing average mean opinion score(MOS) over all users(Max-MOS), maximizing the minimum MOS among all users(Max Min-MOS) and maximizing the minimum MOS with dropping some users requiring the highest amount of resources(Max Min-Min MOSX.Y-MOS). Then, the improved Max Min-Min MOSX.Y-MOS criterion focuses on changing user dropping principle to promote the probability of more users obtaining satisfied experience. By defining MOS higher than threshold as the effective MOS, maximizing average effective MOS over all users(Max-EMOS) is proposed as a totally new criterion which gives quantitative measurement of how many users to what extent obtaining satisfied experience. Mathematical expressions and solutions of these schemes are also presented in this paper. In addition, performance comparisons are made in simulations to further display their respective advantages and disadvantages. 展开更多
关键词 single carrier frequency division multiple access(
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