发明授权
- 专利标题： Apparatus and method of error vector measurement for digital and multiple-input multiple output IMO communication systems
- 专利标题（中）： 数字和多输入多输出IMO通信系统的误差矢量测量装置和方法
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申请号： US11971095申请日： 2008-01-08
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公开(公告)号： US08036298B2公开(公告)日： 2011-10-11
- 发明人: Pansop Kim , Jeng-Hong Chen
- 申请人： Pansop Kim , Jeng-Hong Chen
- 申请人地址： TW Hsinchu
- 专利权人： Integrated System Solution Corp.
- 当前专利权人： Integrated System Solution Corp.
- 当前专利权人地址： TW Hsinchu
- 代理机构： Muncy, Geissler, Olds & Lowe, PLLC
- 主分类号： H04B7/02
- IPC分类号： H04B7/02 ; H04L1/02
摘要：
The present invention discloses an effective apparatus and method to measure the received signal quality for digital communication systems by measuring error vector measurement (EVM) with embedded EVM measurement block in receivers. The distinction of the present invention is that the EVMSIG and the EVMDATA are measured in the receiver for the SIGNAL fields and DATA fields, respectively. EVMSIG is a good indicator for one spatial stream and EVMDATA is a good indicator for current multiple streams. The receiver determines the optimum number of spatial data streams for feedback to the transmitter based on the combinations of EVMSIG and EVMDATA with or without other algorithms such as analysis on periodically requested sounding packet. The receiver also determines the optimum modulation and coding schemes for feedback based on the EVM measurements.
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