发明名称 |
NOISE AND CHANNEL ESTIMATION USING LOW SPREADING FACTORS |
摘要 |
Noise measurements are made within a fraction of a single symbol period of a longest orthogonal code symbol. A control processor (520) identifies an unoccupied code having a spreading factor that is less than a longest spreading factor for the system. A despreader (512) measures symbol energy based on the unoccupied code and a noise estimator (516) generates noise estimations based on the measured symbol energies. The subscriber station uses similar techniques in order to perform channel estimations within a period that is a fraction of a symbol period of a longest-spreading-factor code.
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申请公布号 |
KR20050073621(A) |
申请公布日期 |
2005.07.14 |
申请号 |
KR20057008104 |
申请日期 |
2003.11.05 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
SHIU DA SHAN;MALLADI DURGA P.;BHASHYAM SRIKRISHNA |
分类号 |
H04B1/10;H04B1/707;H04L1/20;H04L25/02;H04L25/03;(IPC1-7):H04B1/10;H04B1/69 |
主分类号 |
H04B1/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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