| 发明名称 | Multi-band crest factor reduction | ||
| 摘要 | Clipping a widely-separated, multi-carrier signal is effectively performed without having to use a high sampling speed. Clipping is performed in a first stage at a combined signal level, but with a predetermined carrier separation of at least twice the channel bandwidth (2CBW), followed by repositioning the carriers at baseband zero frequency. After clipping, carriers are placed at their respective center frequencies with full carrier separation reintroduced in a second stage. Iterative clipping stages smooth out signal reshaping and re-settled amplitudes for combined carriers. | ||
| 申请公布号 | US9215120(B2) | 申请公布日期 | 2015.12.15 |
| 申请号 | US201113333736 | 申请日期 | 2011.12.21 |
| 申请人 | Telefonaktiebolaget L M Ericsson (publ) | 发明人 | Rexberg Leonard;Malmqvist Håkan |
| 分类号 | H04L27/26;H04B1/00;H04B1/04 | 主分类号 | H04L27/26 |
| 代理机构 | Patent Portfolio Builders, PLLC | 代理人 | Patent Portfolio Builders, PLLC |
| 主权项 | 1. A method for crest factor reduction (CFR) of a multi-carrier signal, each carrier of the multi-carrier signal having a respective center frequency and a channel bandwidth (CBW), the method comprising: positioning a baseband version of each of the carriers to a frequency separation between adjacent carriers of at least 2 CBW, thereafter, combining the positioned carriers into a composite signal, clipping the composite signal, repositioning each carrier of the clipped composite signal back into a baseband version centered at zero frequency, and positioning each carrier at their respective center frequency. | ||
| 地址 | Stockholm SE | ||