Intelligent control of receiver linearity based on interference
US6311048A · kind A · utility
Inventor
Key dates
| Filing date | Sep 24, 1998 |
| Grant date | Oct 30, 2001 |
| Priority date | — |
| Expiry date | Sep 24, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/109
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and system for intelligently controlling the linearity of an RF receiver by selectively increasing the effective third-order intercept point (IP3) value of a low noise amplifier (LNA)/mixer channel only when needed. A control signal is generated based on mode of operation (receive mode); received signal strength information (RSSI); transmit channel output power, as indicated by a Tx automatic gain control (AGC) signal; and the true received signal strength, as indicated by the pilot signal-to-noise ratio in a CDMA system. The control signal is then used to selectively increase the bias current--and thus linearity--of the LNA/mixer channel, or to select one of several LNAs having differing IP3 values to effectively increase the linearity of the LNA/mixer channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.