| 发明名称 | Method and apparatus for channel estimation in a transmit diversity environment | ||
| 摘要 | A method of channel estimation for a signal having a first portion transmitted using a transmit delay diversity scheme and a second portion transmitted using another multi-antenna transmission scheme includes determining a composite channel estimate from the transmit delay diversity portion of the signal. The method continues with segregating the composite channel estimate into delay groups corresponding to time offsets of the transmit delay diversity scheme for determination of first channel estimates for each subset of transmit antennas. Second channel estimates are determined for each subset of transmit antennas as a function of pilot symbols received in the second portion of the signal and corresponding ones of the first channel estimates. Thus, the first channel estimates are used to improve estimation of the second channel estimates. The method and variations of it may be implemented by configuring one or more processing circuits within a receiver circuit. | ||
| 申请公布号 | US8811352(B2) | 申请公布日期 | 2014.08.19 |
| 申请号 | US200711757777 | 申请日期 | 2007.06.04 |
| 申请人 | Telefonaktiebolaget LM Ericsson (Publ) | 发明人 | Ramesh Rajaram;Koorapaty Havish;Balachandran Kumar |
| 分类号 | H04W4/00 | 主分类号 | H04W4/00 |
| 代理机构 | Coats and Bennett, P.L.L.C. | 代理人 | Coats and Bennett, P.L.L.C. |
| 主权项 | 1. A method of channel estimation for a signal having a first portion transmitted using a transmit delay diversity scheme and a second portion transmitted using another multi-antenna transmission scheme, the method comprising: determining a composite channel estimate for the first portion of the signal; determining first channel estimates for each subset of transmit antennas based on segregating the composite channel estimate into delay groups corresponding to time offsets of the transmit delay diversity scheme; and determining second channel estimates for each subset of transmit antennas as a function of corresponding ones of the first channel estimates for each subset of transmit antennas and as a function of pilot symbols received in the second portion of the signal, such that the corresponding ones of the first channel estimates for each subset of transmit antennas are used to improve estimation of the second channel estimates for each subset of transmit antennas for the second portion of the signal. | ||
| 地址 | Stockholm SE | ||