发明名称 |
METHOD AND APPARATUS FOR NORMALIZING INPUT METRIC TO A CHANNEL DECODER IN A WIRELESS COMMUNICATION SYSTEM |
摘要 |
<p>An apparatus and method are provided for normalizing input soft metric to a channel decoder in a wireless communication system. A demapper generates soft metric using an in-phase component (Xk) and a quadrature component (Yk) of a received modulated symbol (Rk), a channel fading coefficient (gk) and a constant value (c) defined by a modulation order of the received modulated symbol. A normalizer receives the soft metric, computes a normalized log likelihood ratio (LLR) by multiplying the soft metric by a ratio of the constant value to a noise variance value, transforms the normalized LLR into a desired range and a desired number of bits, and outputs an input LLR of the channel decoder.</p> |
申请公布号 |
EP1946509(A1) |
申请公布日期 |
2008.07.23 |
申请号 |
EP20060812541 |
申请日期 |
2006.11.10 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
KIM, SANG-HYO;KIM, MIN-GOO;GU, YOUNG-MO |
分类号 |
H04L27/26;H04B1/707;H04L1/00;H04L25/06;H04L27/00 |
主分类号 |
H04L27/26 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|