| 发明名称 | Frequency selective predistortion | ||
| 摘要 | A baseband PA predistortion module, which includes a baseband combiner, a baseband PA correction circuit, and a baseband filter, is disclosed. The baseband PA correction circuit replicates behavior of an RF PA by processing a modulation data signal to provide a predistortion data signal. The behavior of the RF PA includes distortion. The modulation data signal is representative of an RF input signal to an RF PA and the predistortion data signal is representative of a correction needed at an output of the RF PA. The baseband filter receives and filters the predistortion data signal to provide a reduced predistortion data signal, such that a low frequency content of the reduced predistortion data signal is less than a low frequency content of the predistortion data signal. The baseband combiner receives and combines the modulation data signal and the reduced predistortion data signal to provide a baseband transmit signal. | ||
| 申请公布号 | US9276784(B2) | 申请公布日期 | 2016.03.01 |
| 申请号 | US201414548129 | 申请日期 | 2014.11.19 |
| 申请人 | RF Micro Devices, Inc. | 发明人 | Folkmann Andrew F.;Khlat Nadim |
| 分类号 | H04K1/02;H04L25/03;H04L25/49;H04L25/08;H03F3/19;H03F3/24;H03F1/32;H03F1/02 | 主分类号 | H04K1/02 |
| 代理机构 | Withrow & Terranova, P.L.L.C. | 代理人 | Withrow & Terranova, P.L.L.C. |
| 主权项 | 1. The radio frequency (RF) system control circuitry comprising a baseband power amplifier (PA) predistortion module, which comprises: a baseband PA correction circuit configured to replicate behavior of an RF PA by processing a modulation data signal to provide a predistortion data signal, wherein: the behavior of the RF PA includes distortion; andthe modulation data signal is representative of an RF input signal to the RF PA; andthe predistortion data signal is representative of a correction needed at an output of the RF PA; a high pass baseband filter configured to receive and filter the predistortion data signal to provide a reduced predistortion data signal, wherein a low frequency content of the reduced predistortion data signal is less than a low frequency content of the predistortion data signal, and a break frequency of the high pass baseband filter is based on a transmit/receive offset frequency; and a baseband combiner configured to receive and combine the modulation data signal and the reduced predistortion data signal to provide a baseband transmit signal. | ||
| 地址 | Greensboro NC US | ||