CAJ | 학술논문

针对传统基于PSK调制的幅度相位双差分空时码(Amplitude-phase Double Differential Space-Time Codes)在信息传输速率提高时会带来性能严重下降以及每次只能传输奇数个比特的缺点,提出了一种适合于高阶PSK调制的改进的幅度相位双差分空时码方案.与传统幅度相位双差分空时码相比,通过引入多电平调制幅度系数的办法,提高信息传输速率,新方案对误比特性能和信息传输速率进行了一个较好的折中.而与基于PSK调制的单幅值差分空时码DSTC(Differential Space-Time Coding)相比,则是在相同的传输速率下提高了性能.
침대전통기우PSK조제적폭도상위쌍차분공시마(Amplitude-phase Double Differential Space-Time Codes)재신식전수속솔제고시회대래성능엄중하강이급매차지능전수기수개비특적결점,제출료일충괄합우고계PSK조제적개진적폭도상위쌍차분공시마방안.여전통폭도상위쌍차분공시마상비,통과인입다전평조제폭도계수적판법,제고신식전수속솔,신방안대오비특성능화신식전수속솔진행료일개교호적절중.이여기우PSK조제적단폭치차분공시마DSTC(Differential Space-Time Coding)상비,칙시재상동적전수속솔하제고료성능.
The increase of bits rate would seriously decrease the performance of traditional amplitude-phase differential space-time codes and system can only transmit odd bits information. To ameliorate these disadvantages we proposed an improved ampli-tude-phase differential space-time codes scheme based on MPSK modulation. Compared with traditional amplitude-phase double differential space-time codes, this scheme well balanced error-bit rate and data rate to enhance the bits rate through introducing an amplitude coefficient of multi-level modulation. Under same bits rate comparing proposed scheme with DSTC (Differential Space-Time Codes), the performance is enhanced.differential detection; PSK; multiple amplitudes; differential detection; bit-error rate