设计了一种采用预编码方式的准正交空时编码（quasi-orthogonal space time code, QOSTC）,其编码方案是首先对发送信号向量进行与信道状态信息无关的酉变换,然后再进行正交编码.酉变换可将QOSTC信道能转化为并行复用传输信道,实现无符...设计了一种采用预编码方式的准正交空时编码（quasi-orthogonal space time code, QOSTC）,其编码方案是首先对发送信号向量进行与信道状态信息无关的酉变换,然后再进行正交编码.酉变换可将QOSTC信道能转化为并行复用传输信道,实现无符号间干扰的高速率并行传输,且接双端信号的最大似然（maximum likelihood,ML）符号译码可简化成线性译码,从而可采用简单的线性检测降低译码复杂度.仿真结果表明,在高信噪比下,酉变换的QOSTC线性检测比没有酉变换的QOSTC的ML检测差2dB左右,但其分集度几乎相同.展开更多
In this paper,the Symbol Error Rate(SER)performance for Orthogonal Space-Time Block Coded(OSTBC)Orthogonal Frequency Division Multiplexing(OFDM)systems over Nakagami-m fading channels is analysed.A novel closed-form S...In this paper,the Symbol Error Rate(SER)performance for Orthogonal Space-Time Block Coded(OSTBC)Orthogonal Frequency Division Multiplexing(OFDM)systems over Nakagami-m fading channels is analysed.A novel closed-form SER expression is proposed,which incorporates the Gauss hypergeometric function and Appell hypergeometric function into the conventional Probability Density Function(PDF)approach.The proposed exact closed-form SER expression is a generalised solution since it perfectly captures OSTBCOFDM systems’performances when having different antenna configurations that employ various modulation schemes and which experience various fading conditions.Finally,Monte Carlo simulation results are provided to demonstrate the exact match between the simulation results and the proposed analytical expressions.展开更多
文摘设计了一种采用预编码方式的准正交空时编码（quasi-orthogonal space time code, QOSTC）,其编码方案是首先对发送信号向量进行与信道状态信息无关的酉变换,然后再进行正交编码.酉变换可将QOSTC信道能转化为并行复用传输信道,实现无符号间干扰的高速率并行传输,且接双端信号的最大似然（maximum likelihood,ML）符号译码可简化成线性译码,从而可采用简单的线性检测降低译码复杂度.仿真结果表明,在高信噪比下,酉变换的QOSTC线性检测比没有酉变换的QOSTC的ML检测差2dB左右,但其分集度几乎相同.
基金supported by the Fundamental Research Funds for the Central Universities(Dalian Maritime University)under Grants No.2012QN043,No.2011QN116
文摘In this paper,the Symbol Error Rate(SER)performance for Orthogonal Space-Time Block Coded(OSTBC)Orthogonal Frequency Division Multiplexing(OFDM)systems over Nakagami-m fading channels is analysed.A novel closed-form SER expression is proposed,which incorporates the Gauss hypergeometric function and Appell hypergeometric function into the conventional Probability Density Function(PDF)approach.The proposed exact closed-form SER expression is a generalised solution since it perfectly captures OSTBCOFDM systems’performances when having different antenna configurations that employ various modulation schemes and which experience various fading conditions.Finally,Monte Carlo simulation results are provided to demonstrate the exact match between the simulation results and the proposed analytical expressions.
