唐友善
后第三代移动通信、多用户检测、联合检测、分集发射及接收、功率控制、切换、移动通信无线资源管理策略、抗干扰通信技术(扩频、跳频)、移动通信技术在军事技术中的应用、数字通信
个性化签名
- 姓名:唐友善
- 目前身份:
- 担任导师情况:
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学术头衔:
博士生导师,
- 职称:-
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学科领域:
造纸技术
- 研究兴趣:后第三代移动通信、多用户检测、联合检测、分集发射及接收、功率控制、切换、移动通信无线资源管理策略、抗干扰通信技术(扩频、跳频)、移动通信技术在军事技术中的应用、数字通信
唐友善,教授1985年从军械工程学院毕业,获雷达工程专业学士学位; 1993年从电子科技大学毕业,获通信与电子系统硕士学位;硕士研究生期间研究移动通信系统网络的计算机辅助设计。1997年从电子科技大学毕业,获通信电子系统博士学位。博士研究生期间研究CDMA系统中的多用户检测技术。1997年上半年进入华为、中国科技大学联合博士后流动站做博士后,主要研究IS-95及第三代移动通信技术,任华为第三代移动通信项目副经理,高级工程师,第三代移动通信研发学术带头人。2000年初从华为、中国科技大学联合博士后流动站出站,同期进入电子科技大学通信抗干扰技术国家级重点实验室做博士后,现为通信与信息工程学院教授。目前的主要学术兴趣:MIMO、OFDM、UWB等,主要研究后第三代移动通信、多用户检测、联合检测、分集发射及接收、功率控制、切换、移动通信无线资源管理策略、抗干扰通信技术(扩频、跳频)、移动通信技术在军事技术中的应用、数字通信等。
主要研究内容:
MIMO、OFDM、UWB等,后第三代移动通信(B3Gor4G),第三代移动通信(3G),CDMA(WCDMA, cdma2000, TD-SCDMA);多用户检测,联合检测,发射分集,抗干扰通信,跳频,扩频,RAKE接收机,超低信噪比环境中CDMA的捕获及跟踪;无线资源管理(功率控制、切换),定位,数字通信等。
主要研究项目:
近几年,主要负责研究的项目,主要有:国家自然科学基金、“863”重大项目、“863”一般项目、总装备部项目、华为公司项目等。 具体研究内容等请参考研究项目介绍。
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成果数
15
唐友善, Song Lijun, Tang Youxi, Li Shaoqian
,-0001,():
-1年11月30日
A novel differential detection method in frequency domain spread spectrum system, called multicarrier spread spectrum chip-level differential detection (MC-SS-CLDD), is proposed. The moment generating function (MGF) of decision variable and a saddlepoint approximation method are exploited to analyze the BER performance of MC-SS-CLDD. The results of analysis and simulation indicate that, If the coherent bandwidth of channel doesn’t exceed the occupied bandwidth of two subcarriers, MC-SS-CLDD exhibits a better performance to make the system resistant to frequency-selective fading in case of narrower coherent bandwidth of channel.
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唐友善, Gang Wu, Youxi Tang and Shaoqian Li
,-0001,():
-1年11月30日
We explore in this paper one novel deterministic simulation model for downlink multiple-input multiple-output (NIIMO) fading channel in wireless communication. The von Mires function, which characterizes accurately the distribution of non-isotropic scattering around mobile station. is used to deterministic modeling process for both space-time codes (STC) scenario and downlink beam-forming (DBF) scenario. Statistical fading characteristics of the simulated MlMO channel, including level-crossing rate, average duration of fades and envelope crosscorrelation. we studied. The impact of non-isotropic scattering on MIMO-link capacity is also investigated. The numerical results show that existence of non-isotropic scattering degraded ergodic capacity of MlMO channel by IbitlHds in the case of STC scenario. And the maxim5m achievable capacity in the case of DBF scenario is always lower than that of STC scenario because transmit steering vector affected the transmit antenna correlation. The proposed MIMO channel simulation model has P universal structure and requires less parameter measurements. Hence. it can be used effectively for link-level simulation and capacity evaluation in MlMO wireless communication systems.
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【期刊论文】BER Performance of Differential Demodulation OFDM System in Multipath Fading Channels
唐友善, Song Lijun, Tang Youxi, Li Shaoqian, Li Yingtao
,-0001,():
-1年11月30日
In this paper, the bit error rate (BER) performance of orthogonal frequency division multiplexing (OFDM) system in multipath fading channels using the frequency domain differential demodulation (FDDD) and time domain differential demodulation (TDDD) is analyzed. The results indicate that in frequency-nonselective fading channel, the BER performance of FDDD is better than that of TDDD. In frequency-selective fading channel, if the time delay doesn’t exceed the guard time, the BER performance of TDDD is not affected by the multipath and time delay, but it will be affected by the Doppler frequency; the BER performance of FDDD is affected by the time delay and the Doppler frequency at the same time. With the increase of Doppler frequency, the BER performance of FDDD is better than that of TDDD demodulation. Index Terms-orthogonal frequency division multiplexing, bit error rate, frequency domain differential demodulation, time domain differential demodulation, Doppler frequency
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唐友善, 唐友喜, 赵宏志, 刘皓, 宋丽英, 刘田, 李少谦
电子学报第4期2005年4月/ACTA EL ECTRONICA SINICA Vol. 33 No. 4 Apr. 2005,-0001,():
-1年11月30日
在采用部分功率训练序列同步的OFDM系统中[1],训练序列会对OFDM承载用户数据的检测造成严重干扰. 本文针对每个无线分组包中只有一个OFDM符号,即训练序列和用户数据同时在一个OFDM符号时间内发射,提出一种抑制训练序列干扰的方法,在接收机中分离训练序列、OFDM承载的用户数据. 在室内多径衰落信道的条件下,本文分析和仿真了训练序列和OFDM承载用户数据的分离性能,结果表明,分析与仿真结果相近,分离效果明显.
正交频分复用, 分离, 训练序列, 误码率
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【期刊论文】Pilot Power Allocation for OFDM Systems
唐友善, Jiming Chen, Youxi Tang, Shaoqian Li
,-0001,():
-1年11月30日
In this paper, the current analysis focuses on the influence of demodulation performance in multipath fading propagation environments, which results from the pilot power variation of pilot symbol assisted modulation (PSAM) M-PSK in orthogonal frequency division multiplexing (OFDM) systems. The pilot-to-data power ratio (PDR) is optimized analytically. Theoretical and simulation results show that the optimum PDR is effected by the signal-to-noise ratio (SNR), Doppler frequency and interpolation size etc, and provide a suitable tool for system design1.
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唐友善, Chenghua Hu, Tang Youxi, Shaoqian Li, Zhongling Li
,-0001,():
-1年11月30日
This paper introduces a new weight-optimizing scheme of partial parallel interference cancellation (PPIC) for CDMA systems over multipath fading channels. The effects of receiving BER of last stage, strength of each path signal and channel estimation error are analyzed. An expression determining the optimal interference cancellation weight (OICW) for PPIC over fading channels is derived, and then a weightoptimizing scheme for PPIC is proposed by processing information from channel estimators. The simulation results in single-rate and multi-rate CDMA systems show that the proposed scheme makes bit error rate (BER) at the following stage less than that at the previous stage, validating our reasonable assumption that stage by stage, the proposed scheme can make the variance of residual interference less and less. Therefore, PPIC using the proposed scheme doesn’t have “ping-pong” effect as and performs better than CW-PPIC. Moreover, at a BER of 0.01, the performance loss of the proposed PPIC stage 2 is only 1.5dB, compared to PPIC with channel-known interference of one stage.
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【期刊论文】OFDM Clipping Noise Mitigation by A Novel Minimum Clipping Power Loss Scheme
唐友善, Xia Lei, Shaoqian Li, Youxi Tang
,-0001,():
-1年11月30日
The performance of a new method, Minimum Clipping Power Loss Scheme, which is based on the relationship between the powers of clipped portion and the clipping noise power of OFDM signals is analyzed in this paper. The effect of different power allocation schemes on the side-information is given. The simulation results prove this method can mitigate clipping noise and improve the performance of system. The performance of the arithmetic is better than that of using the Partial Transmit Sequences to mitigate the clipping noise. The floor of symbol-error-rate is reduced. The arithmetic achieves the better effect if the threshold is lower. While the number of subcarriers is large enough, the performance of system can be close to the theory value.
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唐友善, 雷霞, 唐友喜, 李少谦, 肖悦
电子与信息学报第26卷第7期2004年7月/Journal of Electronics & Information Technology Vol. 26 No. 7 July. 2004,-0001,():
-1年11月30日
该文分析了传输序列法中副信息功率分配方案对系统性能的影响和求解最优功率分配因子的方法;并提出一种简单的求解次优功率分配轏的算法。分析和仿真结果表明,平均各数据子载波上降低少量发送功率,都能在副信息子载波上得到很大增益;随着信噪比的上升,系统趋于将总发送功率平均分配到所有子载波上;在最优及次优功率分配因子条件下得到的系统误比特率与其理想值相吻合。
正交频分复用, 峰值平均功率比, 部分传输序列, 功率分配
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唐友善, 陈继明, 唐友喜, 李省谦
通信学报2003年12月第24卷第12期/JOURNAL OF CHINA INSTITUTE OF COMMUNIATIONS Vol. 24 No.12 December 2003,-0001,():
-1年11月30日
在瑞得衰落信道下,本文研究了导引符号功率对相干OFDM系统性能的影响,计算了由于不精确信道估计引起的系统性能损失,优化分析了导引符号与数据符号功率比,并给出完整的最优功率分配数学表达式。理论分析和仿真结果给出了各种参数对最优功率比的影响,同时理论结果为系统设计提供了依据。
正交频分复用, 导引符号辅助调制, 导引数据功率比, 多进制相移健控, 误码率
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