会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 7. 发明申请
    • METHOD AND ARRANGEMENT FOR FREQUENCY SELECTIVE PRECODING IN A CELLULAR COMMUNICATION SYSTEM
    • 蜂窝通信系统中频率选择性预测的方法和布置
    • WO2010107365A3
    • 2010-11-18
    • PCT/SE2010050215
    • 2010-02-24
    • ERICSSON TELEFON AB L MBALDEMAIR ROBERTASTELY DAVID
    • BALDEMAIR ROBERTASTELY DAVID
    • H04B7/04H04B7/06
    • H04B7/0439H04B7/0426H04B7/0613
    • The basic idea of the present invention is to not only design a frequency-selective precoder with respect to the channel properties but also to ensure that the time- domain spread is limited. Hence the energy of the time-domain impulse response of the frequency-selective precoder is concentrated. According to a first embodiment, the time-domain spread is limited by designing a precoder such that it allows smooth transitions in the frequency domain between the values of the precoder when the precoder provides a staircase function. The smooth transitions can either be achieved by lowpass filtering the frequency-domain representation, the staircase function, of the precoder or by designing the precoder such that the sharp jumps are replaced by slopes. According to a second embodiment, the time-domain spread is controlled. The control may be achieved by employing a time-domain parameterization to precisely control the introduced additional time-domain spread.
    • 本发明的基本思想不仅是针对信道特性设计频率选择性预编码器,而且还要确保时域扩展受到限制。 因此,频率选择性预编码器的时域脉冲响应的能量集中。 根据第一实施例,通过设计预编码器来限制时域扩展,使得当预编码器提供阶梯功能时,允许在预编码器的值之间的频域中的平滑过渡。 平滑过渡可以通过对预编码器的频域表示,阶梯函数进行低通滤波,或者通过设计预编码器来实现,使得尖锐的跳跃被斜率替代。 根据第二实施例,控制时域扩展。 可以通过采用时域参数化来精确控制引入的附加时域扩展来实现该控制。