WIRELESS RADIO SYSTEM OPTIMIZATION BY PERSISTENT SPECTRUM ANALYSIS

摘要

Apparatuses and methods for simultaneously operating as a wireless radio and monitoring the local frequency spectrum. For example, described herein are wireless radio devices that use a secondary receiver to monitor frequencies within the operating band and prevent or avoid interferers, including in particular half-IF interferers. The systems, devices, and methods described herein may adjust the intermediate frequency in a superheterodyne receiver to select an intermediate frequency that minimizes interference. In particular, described herein are apparatuses and methods that use a second receiver which is independent of the first receiver and may be connected to the same receiving antenna to monitor the geographically local frequency spectrum and may detect spurious interferers, allowing the primary receiver to adjust the intermediate frequency and avoid spurious interferes.

主权项

1. A method of controlling reception for a wireless broadband radio by selecting between a plurality of intermediate frequencies (IFs) to minimize spurious interference at a predetermined frequency, the method comprising:
receiving a radio frequency (RF) signal having a frequency fsg in a first receive path having a mixer for generating an intermediate frequency (IF) signal from the RF signal by mixing the RF signal with a local oscillation (LO) signal having a local oscillation frequency fLO, wherein the intermediate frequency is initially set to a first intermediate frequency, fIFI; determining an interference in the RF signal at a first predetermined frequency; and switching the intermediate frequency to a second intermediate frequency, fIF2, and generating the IF signal from the RF signal at the second intermediate frequency if the interference in the RF signal at the first predetermined frequency exceeds a threshold level.