| 发明名称 | Wireless transmission | ||
| 摘要 | A wireless communication device (400) is arranged to transmit a transmission signal in an assigned channel bandwidth. The wireless communication device (400) comprises: a local oscillator (460) arranged to generate a local oscillator signal at a local oscillator frequency and a modulator (434) arranged for converting in-phase and quadrature-phase components of a modulation signal at a modulation frequency to a radio frequency by mixing the in-phase and quadrature-phase components with the local oscillator signal. The local oscillator frequency is arranged to place a third order intermodulation product having a frequency equal to the local oscillator frequency minus three times the modulation frequency within the assigned channel bandwidth. | ||
| 申请公布号 | US9344311(B2) | 申请公布日期 | 2016.05.17 |
| 申请号 | US201214357633 | 申请日期 | 2012.11.14 |
| 申请人 | TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) | 发明人 | Nilsson Magnus |
| 分类号 | H03J7/32;H04L27/20;H04B1/04 | 主分类号 | H03J7/32 |
| 代理机构 | Coats & Bennett, PLLC | 代理人 | Coats & Bennett, PLLC |
| 主权项 | 1. A wireless communication device configured to transmit a transmission signal in an assigned channel bandwidth, the wireless communication device comprising: a local oscillator configured to generate a local oscillator signal at a local oscillator frequency; a modulator configured to convert in-phase and quadrature-phase components of a modulation signal at a modulation frequency to a radio frequency by mixing the in-phase and quadrature-phase components with the local oscillator signal; wherein the local oscillator frequency is arranged to place a third order intermodulation product, having a frequency equal to the local oscillator frequency minus three times the modulation frequency, within the assigned channel bandwidth; a controller configured to place the third order intermodulation product within the assigned channel bandwidth by: changing the local oscillator frequency by a local oscillator offset frequency; andchanging the modulation frequency by a modulation frequency offset equal and of opposite sign to the local oscillator offset frequency; and a sample rate converter configured to change the modulation frequency by the modulation offset frequency by converting a sample rate of the in-phase and quadrature-phase components of the modulation signal. | ||
| 地址 | Stockholm SE | ||