发明授权
US6075815A Symbol-energy-to-noise-density estimation in a QPSK modulated
communication system
失效
QPSK调制通信系统中的符号能量噪声密度估计
- 专利标题： Symbol-energy-to-noise-density estimation in a QPSK modulated communication system
- 专利标题（中）： QPSK调制通信系统中的符号能量噪声密度估计
-
申请号： US931991申请日： 1997-09-17
-
公开(公告)号： US6075815A公开(公告)日： 2000-06-13
- 发明人: Ashvin Chheda , Michael S. Feeney , Ahmad Jalali
- 申请人： Ashvin Chheda , Michael S. Feeney , Ahmad Jalali
- 申请人地址： TX Richardson
- 专利权人： Nortel Networks Corporation
- 当前专利权人： Nortel Networks Corporation
- 当前专利权人地址： TX Richardson
- 主分类号： H04B7/005
- IPC分类号： H04B7/005 ; H04B17/00
摘要：
The process determines the I channel and Q channel components for each received soft value. The location of each soft value with respect to the fade line is determined using the I and Q channel components. These locations are averaged over a power control group duration to determine the noise density. The symbol energy is determined by subtracting the average perpendicular distance from the soft value point to the fade line from half the square of the average of the distance from the soft value point to the origin.
公开/授权文献
- US4148461A Self-aligning scissor type jack 公开/授权日：1979-04-10
信息查询
