US 9,191,037 B2 · Wireless radio system optimization by persistent spectrum analysis

Abstract

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.

Claims24

Dependent claims

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, fIF1;
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, wherein switching the intermediate frequency to a second intermediate frequency further comprises receiving the RF signal in a second receive path while switching the IF to FIF2 to prevent an interruption in data traffic during switching.

1 more element

A wireless broadband radio apparatus adapted to select between a plurality of intermediate frequencies (IFs) to minimize interference, the apparatus comprising:

a receiving antenna;
a first receiver coupled to the receiving antenna having a first receiving path for receiving a radio frequency (RF) signal having a frequency fsg;
a mixer in the first receiving path configured to generate 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, fIF1;
a controller configured to determine if an interference in the RF signal at a first predetermined frequency exceeds a threshold, and to switch the intermediate frequency to a second intermediate frequency, fIF2, if the interference in the RF signal at the first predetermined frequency exceeds the threshold;
and
a second receiver coupled to receive input from the receiving antenna, wherein the controller is configured to process received RF signals using the second receiver while switching the intermediate frequency to fIF2 to prevent an interruption in data traffic during switching.

3 more elements

Dependencies are inferred from the claim text.

Wireless radio system optimization by persistent spectrum analysis

Life of this patent

Wireless radio system optimization by persistent spectrum analysis

Life of this patent

Abstract

Claims24