发明名称 |
ОЦЕНКА ШУМА И ВЗАИМНЫХ ПОМЕХ В СИСТЕМЕ OFDM |
摘要 |
Noise and interference can be independently measured in a multiple user Orthogonal Frequency Division Multiplexing (OFDM) system. Co-channel interference is measured in a frequency hopping, multiple user, OFDM system by tracking the sub-carriers assigned to all users in a particular service area or cell. The composite noise plus interference can be determined by measuring the amount of received power in a sub-carrier whenever it is not assigned to any user in the cell. A value is stored for each sub-carrier in the system and the value of noise plus interference can be a weighted average of the present value with previously stored values. The noise component can be independently determined in a synchronous system. In the synchronous system, all users in a system may periodically be prohibited from broadcasting over a sub-carrier and the received power in the sub-carrier measured during the period having no broadcasts. |
申请公布号 |
RU2005138861(A) |
申请公布日期 |
2006.06.10 |
申请号 |
RU20050138861 |
申请日期 |
2004.05.14 |
申请人 |
КВЭЛКОММ ИНКОРПОРЕЙТЕД (US) |
发明人 |
СУТИВОНГ Арак (US);НАДЖИБ Айман Фавзи (US);АГРАВАЛ Авниш (US) |
分类号 |
H04J11/00;G01H;H04L1/20;H04L27/26 |
主分类号 |
H04J11/00 |
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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