In this paper,we design a spatial modulation based orthogonal time frequency space(SMOTFS)system to achieve improved transmission reliability and meet the high transmission rate and highspeed demands of future mobile ...In this paper,we design a spatial modulation based orthogonal time frequency space(SMOTFS)system to achieve improved transmission reliability and meet the high transmission rate and highspeed demands of future mobile communications,which fully utilizes the characteristics of spatial modulation(SM)and orthogonal time frequency space(OTFS)transmission.The detailed system design and signal processing of the SM-OTFS system have been presented.The closed-form expressions of the average symbol error rate(ASER)and average bit error rate(ABER)of the SM-OTFS system have been derived over the delay-Doppler channel with the help of the union bounding technique and moment-generating function(MGF).Meanwhile,the system complexity has been evaluated.Numerical results verify the correctness of the theoretical ASER and ABER analysis of the SM-OTFS system in the high signal-to-noise ratio(SNR)regions and also show that the SM-OTFS system outperforms the traditional SM based orthogonal frequency division multiplexing(SM-OFDM)system with limited complexity increase under mobile conditions,especially in high mobility scenarios.展开更多
An exact average symbol error rate analysis for the distributed dual-hop relay cooperative network with multiple relays in a Nakagami-m fading environment is presented.In the derivation of the moment generation functi...An exact average symbol error rate analysis for the distributed dual-hop relay cooperative network with multiple relays in a Nakagami-m fading environment is presented.In the derivation of the moment generation function of receiver Signal-to-Noise Ratio(SNR),the sectional integral method is used,instead of the cumulative density function method which is ordinarily used by the deduction of the outage probability of S-R-D link.The accurate symbol error rate of a dual-hop relay cooperative network is obtained with the closed-form Moment Genoration Function (MGF) expression.The correctness of the symbol error rate is verified through numerical simulations and is compared with other analytical methods.These deductions clearly show that the distributed cooperative diversity network presented has strong superiorities in overcoming severe fading and can achieve full diversity order.展开更多
采用余弦调制滤波器组代替传统的OFDM(Orthogonal Frequency Division Multiplexing,正交频分复用)系统中的IFFT/FFT(Inverse Fast Fourier Transform/Fast Fourier Transform,快速傅里叶变换)模块,从而实现基于余弦调制滤波器组的OFDM...采用余弦调制滤波器组代替传统的OFDM(Orthogonal Frequency Division Multiplexing,正交频分复用)系统中的IFFT/FFT(Inverse Fast Fourier Transform/Fast Fourier Transform,快速傅里叶变换)模块,从而实现基于余弦调制滤波器组的OFDM系统.在滤波器组的设计过程中,根据原型滤波器设计的一般要求及实际通信系统中实现的快速算法考虑,采用半正弦窗作为原型滤波器.在理想信道下,信号能够完全重建.实现过程中,余弦调制滤波器组采用IV型离散余弦变换的快速算法来实现.基于matlab软件的仿真平台下,结果表明基于余弦调制滤波器组的OFDM系统与传统OFDM系统相比,误码性能与PAPR(Peak to Average Power Ratio,峰值平均功率比)性能都有了较为明显的改善.展开更多
基金in part by the National Natural Science Foundation of China under Grant 61771291,Grant 61671278in part by the Key Research and Development Project of Shandong Province under Grant 2018GGX101009,Grant 2019TSLH0202,Grant 2020CXGC010109+1 种基金in part by the National Nature Science Foundation of China for Excellent Young Scholars under Grant 61622111in part by the Project of International Cooperation and Exchanges NSFC under Grant 61860206005.
文摘In this paper,we design a spatial modulation based orthogonal time frequency space(SMOTFS)system to achieve improved transmission reliability and meet the high transmission rate and highspeed demands of future mobile communications,which fully utilizes the characteristics of spatial modulation(SM)and orthogonal time frequency space(OTFS)transmission.The detailed system design and signal processing of the SM-OTFS system have been presented.The closed-form expressions of the average symbol error rate(ASER)and average bit error rate(ABER)of the SM-OTFS system have been derived over the delay-Doppler channel with the help of the union bounding technique and moment-generating function(MGF).Meanwhile,the system complexity has been evaluated.Numerical results verify the correctness of the theoretical ASER and ABER analysis of the SM-OTFS system in the high signal-to-noise ratio(SNR)regions and also show that the SM-OTFS system outperforms the traditional SM based orthogonal frequency division multiplexing(SM-OFDM)system with limited complexity increase under mobile conditions,especially in high mobility scenarios.
基金supported by Important National Science ＆ Technology Specific Projects under Grant No.CX01011the Important National Science ＆ Technology Specific Projects under Grant No.4101002+2 种基金the National Natural Science Foundation of China under Grants No.61002014,No.60972017,No.60972018the Excellent Young Teachers Program of MOE,PRC under Grant No.2009110120028the Research Fund for the Doctoral Program of Higher Education under Grants No.20091101110019,No.20070007019
文摘An exact average symbol error rate analysis for the distributed dual-hop relay cooperative network with multiple relays in a Nakagami-m fading environment is presented.In the derivation of the moment generation function of receiver Signal-to-Noise Ratio(SNR),the sectional integral method is used,instead of the cumulative density function method which is ordinarily used by the deduction of the outage probability of S-R-D link.The accurate symbol error rate of a dual-hop relay cooperative network is obtained with the closed-form Moment Genoration Function (MGF) expression.The correctness of the symbol error rate is verified through numerical simulations and is compared with other analytical methods.These deductions clearly show that the distributed cooperative diversity network presented has strong superiorities in overcoming severe fading and can achieve full diversity order.
文摘采用余弦调制滤波器组代替传统的OFDM(Orthogonal Frequency Division Multiplexing,正交频分复用)系统中的IFFT/FFT(Inverse Fast Fourier Transform/Fast Fourier Transform,快速傅里叶变换)模块,从而实现基于余弦调制滤波器组的OFDM系统.在滤波器组的设计过程中,根据原型滤波器设计的一般要求及实际通信系统中实现的快速算法考虑,采用半正弦窗作为原型滤波器.在理想信道下,信号能够完全重建.实现过程中,余弦调制滤波器组采用IV型离散余弦变换的快速算法来实现.基于matlab软件的仿真平台下,结果表明基于余弦调制滤波器组的OFDM系统与传统OFDM系统相比,误码性能与PAPR(Peak to Average Power Ratio,峰值平均功率比)性能都有了较为明显的改善.
