Method of allocating a transmission power level to pilot symbols used for estimating the channel of a transmission system of the multicarrier type with spreading of the signal in the frequency domain by spreading sequences
US7061881B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2001 |
| Grant date | Jun 13, 2006 |
| Priority date | — |
| Expiry date | Jan 16, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W52/325
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of determining transmission power of transmitted pilot symbols used for estimating channel coefficients in a transmission frame of a multicarrier transmission system having OFDM-CDMA, MC-CDMA, MC-CDM or MC-SS-MA frequency domain spreading sequences. The method includes determining a performance level to be achieved by the transmission, deducing the signal to noise ratio level introduced by the channel from the performance level to be achieved, deducing a single code transmission power Q0 of the pilot symbols for a single spreading code from the signal to noise ratio level, deducing an increase in power α for transmitting the pilot symbols using a number of spreading codes K, and determining the transmission power Q of the pilot symbols at predetermined times, based on the following equations:Q=α(K−1)+Q0; K>1; α>0; and Q0>α.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.