公开(公告)号：US08891637B2

公开(公告)日：2014-11-18

申请号：US11672854

申请日：2007-02-08

申请人： Byoung-Hoon Kim ,  Durga Prasad Mailadi

发明人： Byoung-Hoon Kim ,  Durga Prasad Mailadi

IPC分类号： H04L27/28 ,  H04L1/00 ,  H04L25/03 ,  H04L27/26

CPC分类号： H04L1/0001 ,  H04L1/0003 ,  H04L25/03828 ,  H04L27/2614 ,  Y02D50/10

摘要： Techniques for performing spectral shaping to achieve a desired peak-to-average ratio (PAR) are described. Spectral shaping may be selectively performed for a single-carrier frequency division multiplexing (SC-FDM) signal based on one or more criteria, e.g., in transmit power limited conditions and/or if a modulation scheme with lower PAR is unavailable. At least one parameter of a window function or spectral shaping filter may also be adjusted based on at least one characteristic of the SC-FDM signal. For example, the roll-off of the spectral shaping filter may be adjusted based on the modulation scheme and/or the number of subcarriers used for the SC-FDM signal. A transmitter may perform spectral shaping on modulation symbols, if enabled, to obtain spectrally shaped symbols. Spectral shaping may be performed in the frequency domain either within an allocated bandwidth or with bandwidth expansion. The SC-FDM signal may be generated based on the spectrally shaped symbols.

摘要翻译： 描述了进行光谱整形以达到期望的峰均比（PAR）的技术。 可以基于一个或多个准则，例如在发射功率受限状态和/或如果具有较低PAR的调制方案不可用，可以针对单载波频分复用（SC-FDM）信号选择性地执行频谱整形。 还可以基于SC-FDM信号的至少一个特性来调整窗口函数或频谱整形滤波器的至少一个参数。 例如，可以基于用于SC-FDM信号的调制方案和/或子载波的数量来调整频谱整形滤波器的滚降。 发射机可以在调制符号上执行频谱整形，如果使能，则获得频谱形状的符号。 光谱整形可以在分配的带宽内或频带扩展中在频域中执行。 可以基于频谱形状的符号来生成SC-FDM信号。