发明名称 |
METHOD AND APPARATUS FOR SCALING A SIGNAL FOR IMPROVING PERFORMANCE OF A RECEIVER IN A MIMO SYSTEM |
摘要 |
A multiple-input multiple-output (MIMO) receiver includes a MIMO decoder, a pre-scaling unit, a demapper, and a post-scaling unit. The MIMO decoder performs a MIMO decoding on received signals to decouple a plurality of symbols transmitted via a plurality of data streams. Both pre-demapping scaling and post-demapping scaling are performed to improve the performance of the receiver. A pre-scaling coefficient is applied to the symbols by the pre-scaling unit to generate pre-scaled symbols. The pre-scaled symbols are converted to soft bits by the demapper. The post-scaling unit then applies a post-scaling coefficient to the soft bits. The post-scaling coefficient is a signal-to-interference and noise ratio (SINR). Cross interference is taken into account in post-demapping scaling to obtain more accurate soft bits for subsequent decoding. The present invention is applicable to both a multi-carrier system, (such as orthogonal frequency division multiplexing (OFDM)), and a single carrier system. |
申请公布号 |
WO2007142835(A2) |
申请公布日期 |
2007.12.13 |
申请号 |
WO2007US12278 |
申请日期 |
2007.05.23 |
申请人 |
INTERDIGITAL TECHNOLOGY CORPORATION;LI, YINGXUE;OLESEN, ROBERT, LIND |
发明人 |
LI, YINGXUE;OLESEN, ROBERT, LIND |
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