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机会频谱接入系统中基于次用户容量分析的检测参数设计 被引量:2
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作者 孙君 朱洪波 《电子与信息学报》 EI CSCD 北大核心 2011年第1期205-210,共6页
该文对认知网络中基于机会频谱接入(OSA)技术的认知用户的信道容量表达式及其检测参数进行了研究。首先讨论了次用户信号干扰噪声比(SINR)的特性,得到存在干扰和不存在干扰两种状况下的SINR的均值表达式,探讨SINR对次用户信道容量的影响... 该文对认知网络中基于机会频谱接入(OSA)技术的认知用户的信道容量表达式及其检测参数进行了研究。首先讨论了次用户信号干扰噪声比(SINR)的特性,得到存在干扰和不存在干扰两种状况下的SINR的均值表达式,探讨SINR对次用户信道容量的影响,以及次用户的信道容量在OSA方式下的变化。并在此基础上,结合信道统计特性,运用跨层设计思想,设计次用户的发送数据帧长和检测频率。从分析结果可以看出,主用户对授权信道的占用模型影响次用户的SINR,进而影响到次用户检测频率和传输帧长的设计,结果表明从次用户物理层特性和主用户业务特性结合角度设计次用户检测参数的方案,在保证次用户吞吐量要求的同时,降低了主次用户之间的干扰,同时提高了系统对频谱的利用率。 展开更多
关键词 无线通信 数据帧长 检测频率 信道噪声干扰比 信道容量 机会频谱接入
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Generalized Physical Layer Channel Model for RelayBased Super Dense Networks 被引量:1
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作者 ZHANG Lingwen LIU Chang +1 位作者 ZHANG Jiayi WU Faen 《China Communications》 SCIE CSCD 2015年第8期123-131,共9页
The κ-μ fading model is an advanced channel model in super dense wireless networks.In this paper,we evaluate the performance of the system over κ-μ fading channel in super dense relay networks with consideration o... The κ-μ fading model is an advanced channel model in super dense wireless networks.In this paper,we evaluate the performance of the system over κ-μ fading channel in super dense relay networks with consideration of multiple independent but not necessarily identically distributed(i.n.i.d.) cochannel interference(CCI) under interferencelimited environment.More specifically,we derive a useful and accurate cumulative distribution function(CDF) expression of the end-to-end signal-to-interference plus noise(SINR) ratio.Moreover,we derive novel analytical expressions of the outage probability(OP),average bit error probability(ABEP) and average capacity for binary modulation types and arbitrary positive values of κ-and μ of such system.Furthermore,we propose asymptotic analysis for both the OP and ABEP to give physical insights.A simplified analytical form for the ABEP at high-SNR regimes is provided as well.Finally,the accuracy of the derived expressions is well validated by Monte Carlo simulations. 展开更多
关键词 super dense generalized fadingmodel RELAY co-channel interference DECODE-AND-FORWARD outage probability average biterror probability average capacity.
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