发明名称 |
Förbättringar av, eller med avseende på, multibärvågssystem |
摘要 |
The system includes a digital receiver unit and transmission unit. The receiver unit including a symbol detection unit. The system determines a parameter for each individual carrier wave. The parameter indicate a deviation in a received signal from a corresponding constellation point. The parameter is compared with an upper and a lower limit. When the parameter is outside the limits the used constellation is altered in order to modulate the carrier wave to a neighbouring constellation. The symbol detection unit is used to determine the parameter for a carrier wave. The parameter is a ratio d2/o2, where d is the shortest distance between adjoining constellations, o is a standard deviation, and o2 is the variance in the deviations in the input and output signal values in the symbol detection unit. |
申请公布号 |
SE9603196(L) |
申请公布日期 |
1997.11.30 |
申请号 |
SE19960003196 |
申请日期 |
1996.09.02 |
申请人 |
TELIA AB |
发明人 |
ISAKSSON MIKAEL;JOHANSSON MAGNUS;TONVALL HARRY ERLAND;OLSSON LENNART;STEFANSSON TOMAS;OEHMAN HANS;BAHLENBERG KJELL GUNNAR;ISAKSSON ANDERS IMANUEL;OEKVIST SVEN GOERAN;LJUNGGREN KARIN LIS-MARI;NORDSTROEM TOMAS;ISAKSSON LARS-AAKE;BENGTSSON DANIEL;YE WEN;HAAKANSSON SIWERT |
分类号 |
H04L;H04L5/06;H04L27/26;(IPC1-7):H04L5/06 |
主分类号 |
H04L |
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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