MC-CDMA downlink transmission method
US7336636B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 22, 2003 |
| Grant date | Feb 26, 2008 |
| Priority date | — |
| Expiry date | Sep 6, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W52/42
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The invention concerns a transmission method for transmitting a plurality of symbols from a base station of a MC-CDMA telecommunication system to a plurality (K) of users, each symbol (dk) to be transmitted to a user being spread with a coding sequence (ck(l), ckext(l) over a plurality (L) of carriers (l) to produce a plurality of corresponding frequency component, said base station being provided with a plurality (M) of antenna elements. According to the invention, each frequency component produced by a symbol of a user (k) is weighted by a plurality (M) of weighting complex coefficients (wk*(l,m),m=1, . . . ,M) to obtain a plurality (LM) of weighted frequency components (zkm(l)), each weighting coefficient being relative to a user (k), a carrier (l) and an antenna element (m) and said plurality of weighting coefficients being determined from estimates of the channel coefficients (hk(l,m)) of the downlink transmission channels between each antenna element and each user for each carrier frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.