Reverse link outer loop power control with adaptive compensation
US6965780B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2000 |
| Grant date | Nov 15, 2005 |
| Priority date | — |
| Expiry date | Feb 28, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W52/225
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a wireless communications system, a base station employs a bit error rate (BER) based Reverse Outer Loop Power Control (ROLPC) technique. The ROLPC technique uses either instantaneous or weakly filtered values of the BER for comparison with a BER target value for adjusting a target signal-to-noise ratio (SNR). The BER target value is varied as a function of a second order statistic (e.g. variance, standard deviation) of the received SNR. In another embodiment, a symbol error count based ROLPC technique uses adaptive SER targets. In particular, a base station uses a 2nd order statistic, e.g., standard deviation (variance), to identify, or act as a signature of, a particular cellular (wireless) communications environment. The base station monitors the standard deviation of the symbol error count of a received signal (transmitted from a mobile station). The target signal-to-noise ratio ((Eb/N0)T) of this received signal is adjusted as a function of the value of the standard deviation and the adjusted (Eb/N0)T target is used to provide power control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.