杨晨阳
超宽带通信、 MIMO-OFDM、协作通信和传感器网络等
个性化签名
- 姓名:杨晨阳
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师, 优秀教师/优秀教育工作者
- 职称:-
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学科领域:
信息处理技术
- 研究兴趣:超宽带通信、 MIMO-OFDM、协作通信和传感器网络等
杨晨阳,1965年生,博士,北京航空航天大学电子信息工程学院教授,博士生导师,北航学术委员会委员,中国电子学会通信学分会委员,信号处理学会委员、信号处理杂志编委、数据采集与处理杂志编委、IEEE会员。
自1989年参加工作以来,曾作为项目负责人和主要参加者主持和参加了多项基金、国家重点预研项目和国际合作项目,在雷达与无线通信中的信号处理等方面从事研究工作,在国内外重要学术刊物和会议上发表论文60余篇,获国家科技进步三等奖1项、部级科技进步二等奖3项,1999年获教育部首届全国优秀青年教师奖励计划资助。
自1999年开始在无线通信网络中的信号处理领域进行理论研究和工程设计。通过主持与美国高科技公司合作的近10个研发项目,带领课题小组针对无线局域网和无线个人网通信标准IEEE 802.11a/g/n和IEEE 802.15.4基带系统芯片的算法进行设计和实现,在无线通信领域中已经在国内外重要学术刊物和国际会议上发表了40余篇文章,在美国申请了9项专利,向IEEE国际标准委员会提出了十几项技术提案。通过与国际合作伙伴密切配合,2004年课题组针对IEEE 802.15. 4b提出了多项物理层和MAC层提案,在2005年初召开的IEEE 802.15标准委员会上,基本同意全面接收我们的调制提案作为IEEE 802.15.4b的物理层,并向全世界征求修改意见。
目前研究兴趣为超宽带通信、 MIMO-OFDM、协作通信和传感器网络等。
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3416
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381
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成果数
8
杨晨阳, 徐斌, , 毛士艺
,-0001,():
-1年11月30日
本文提出一种采用循环前缀和脉冲调制的超宽带无线通信系统(UWB-CP/PM),以及相应的信号处理算法。借鉴采用循环前缀的单载波通信系统(SC-CP)的基本思想,UWB-CP/PM系统通过变换域均衡可以很好地抑制多径干扰。借助脉冲调制,UWB-CP/PM系统可以大大简化收发器件。利用脉冲重复周期大于脉冲宽度的特点,UWB-CP/PM系统不仅可以通过多支路接收和并行处理降低系统对基带处理速度的要求,还可以通过变换域信号处理有效地抑制衰落、多用户干扰和窄带干扰。仿真结果验证了上述性能。
超宽带, 干扰抑制, WPAN, 无线通信
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50浏览
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杨晨阳, 洪慧勇
,-0001,():
-1年11月30日
在研究单次频偏累积相偏估计的基础上,本文详细分析了两次独立的频偏累积相偏估计带来的频偏捕获范围的提高。并在此基础上提出一种基于训练序列的载波同步算法。这种算法利用时域两次独立的不同分辨力的相偏估计,解决了单次估计可能存在的相位模糊问题,从而实现了大频偏载波同步。通过理论分析给出了这种算法的性能,并通过仿真进行了验证。由于完全在时域进行估计,和其他大频偏载波同步算法相比,这种算法计算量小,且实现简单
正交频分复用, 载波同步, 频偏估计
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【期刊论文】An AV-Based RAKE-Like Receiver for DS-CDMA Systems
杨晨阳, Bin Xu, Chenyang Yang, Member, IEEE, and Shiyi Mao
,-0001,():
-1年11月30日
Recently, several detectors based on auxiliary vector (AV) filters are presented to suppress multiaccess interference (MAI) in direct-sequence/code-division-multiple-access (DS-CDMA) systems. Knowing the signature waveform of the desired user, these AV-based detectors are a class of promising candidates for MAI suppression due to their superior performance and low computational complexity. However, it is hard to obtain the desired user's signature waveform, which is the convolution of the user's spreading sequence and the channel impulse response, unless the channel vector is known or unless training signals are sent. In this letter, based on both of the merits of AV detectors and RAKE receivers, an AV-based RAKE-like receiver is proposed for DS-CDMA communication systems in multipath channels. Simulation results indicate that the performance of the new receiver is very close to that of the AV detectors, which know the exact signature waveform of the desired user.
Auxiliary vector,, direct-sequence/, code division multiple access (, DS-CDMA), ,, multiuser detection,, RAKE receiver.,
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【期刊论文】Coded Modulation and Joint Detection of Ultra-wideband Signals*
杨晨阳, Yafei Tian and Chenyang Yang
,-0001,():
-1年11月30日
Exploiting the abundant freedom of UWB signals can increase the Euclidean distance among codewords which will lead to an enhancement of the communication quality. In this paper, a coded modulation UWB system combining PPM, PAMand convolutional coding is proposed, which can significantly increase the power efficiency without degrading the data rate. The performance of this coded modulation system primarily depends on the free Euclidean distance and the number of corresponding error bits induced by the error paths. The code generator with maximal minimum free distance and minimum error bits is found to optimize the system. In order to avoid the difficulty of channel estimation and accurate time synchronization in rich multipath environments, a joint multiple symbol detector and decoder for the coded modulation system is presented which is able to approximate the performance of uncoded PPM system in AWGN channel under viable computational burden. Simulation results obtained from Nakagami multipath channel agree with our analysis.
Ultra-wideband,, coded modulation,, multi-symbol detection.,
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46浏览
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【期刊论文】A MAC Protocol Supporting Cooperative Diversity for DistributedWireless Ad Hoc Networks*
杨晨阳, Xin Wang, Chenyang Yang
,-0001,():
-1年11月30日
In this paper, a new MAC protocol supporting cooperative diversity named as CD-Maca is presented. By making use of the information carried by the handshaking frames of the Maca protocol, which has been employed in IEEE 802.11 standard, the CD-Maca protocol allows terminals in the network to transmit data frames cooperatively, resulting in more reliable retransmission and better performance. We model the CD-Maca protocol with Markov chain and derive the throughout of the protocols. It's shown by numerical results and simulations that the performance of the CD-Maca protocol depends on the packet error ratio (PER) of the handshaking frames, the PER of the cooperative transmission and the network topologies.
cooperative diversity,, MAC,, CD-Maca,, ad hoc networks.,
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29浏览
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【期刊论文】ITERATIVE ALGORITHMS FOR LCMP AUXILIIARY-VECTOR FILTER1
杨晨阳, Feng Wu, Chenyang Yang
,-0001,():
-1年11月30日
The iterative algorithm for minimum variance distortion- less response filter based on auxiliary-vector (IMVDR-AV) is generalized in this paper from different perspective. By extending the optimization criteria on filter design, it is generalized to an iterative algorithm of linear constrained minimum power filter (ILCMP-AV). Starting from this algorithm, we present an iterative algorithm of LCMP filter based on local optimization criterion (ILCMP-LOC) which converges rapidly by further generalizing the conditional optimization criterion on weighting coefficient computation. For any positive definite input auto- correlation matrix and any linear constraint, the ILCMP-AV algorithm recursively generates a sequence of auxiliary vectors by maximizing the magnitude cross correlation under some constraint conditions and its corresponding weighting coefficients by minimizing the filter output variance. Theoretical analysis illustrates that the combination of the updated filters and the weighted auxiliary vectors forms a sequence of filters that converges to the LCMP solution.
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37浏览
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【期刊论文】The Achievable Rate of Multi-symbol Detection for Ultra-wideband PPM Communications*
杨晨阳, Yafei Tian and Chenyang Yang
,-0001,():
-1年11月30日
A multi-symbol detection (MSD) method based on the approximation of ML decoding for detecting the signal modulated by PPM in unknown UWB channels is proposed. The explicit expression of the achievable rates of PPM with MSD is derived, from which we study the relationship between the achievable rates, SNR and channel bandwidth. The numerical results show that multi-symbol detection significantly improves the achievable rates over conventional non-coherent detection. When channel bandwidth tends to infinity, as long as symbol number N keeps up with the resolvable multipath number L, the achievable rates will tend to AWGN capacity.
Ultra-wideband,, PPM,, multi-symbol detection,, achievable rates.,
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38浏览
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杨晨阳, 张良
,-0001,():
-1年11月30日
RAKE接收机常被超宽带(UWB)系统用来收集信号的能量和减小信号衰落。本文从缩短信道时延扩展的角度出发,研究RAKE接收机的部分信道均衡能力。本文推导出了RAKE接收机均衡性能与RAKE接收机的复杂度和信道衰减系数之间的关系;分析了信道估计误差对RAKE接收机合并前后多径信道变化的影响。研究表明当存在估计误差时,RAKE接收机仍然能实现缩短信道的作用,但是性能有所下降;由于低复杂度RAKE接收机引入的估计误差较少,在低信噪比条件下其缩短信道性能甚至会优于高复杂度的RAKE接收机。
超宽带(UWB)、RAKE 接收机、信道估计、缩短信道
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