US 11,990,927 B2
Method for improving performance of low-intermediate frequency receiver, storage medium, and receiver
Ni Huang, Guangdong (CN); Dawu He, Guangdong (CN); Cunhao Gao, Guangdong (CN); Guangbin Huang, Guangdong (CN); and Yongdong Wang, Guangdong (CN)
Assigned to HYTERA COMMUNICATIONS CORPORATION LIMITED, Guangdong (CN)
Appl. No. 17/608,640
Filed by HYTERA COMMUNICATIONS CORPORATION LIMITED, Guangdong (CN)
PCT Filed Mar. 3, 2020, PCT No. PCT/CN2020/077646
§ 371(c)(1), (2) Date Nov. 3, 2021,
PCT Pub. No. WO2020/224315, PCT Pub. Date Nov. 12, 2020.
Claims priority of application No. 201910368255.6 (CN), filed on May 5, 2019.
Prior Publication US 2022/0224363 A1, Jul. 14, 2022
Int. Cl. H04B 1/10 (2006.01)
CPC H04B 1/1027 (2013.01) [H04B 2001/1045 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for improving performance of a low-intermediate frequency receiver, the method comprising:
selecting a local oscillator signal from a preset local oscillator frequency set as an initial local oscillator signal to perform frequency mixing on an input signal, so as to obtain a low-intermediate frequency signal, wherein the low-intermediate frequency signal comprises a low-intermediate frequency useful signal and a low-intermediate frequency interference signal;
determining whether an energy ratio of the low-intermediate frequency interference signal to the low-intermediate frequency useful signal is greater than a first preset ratio; and
if so, selecting another local oscillator signal from the preset local oscillator frequency set as a current local oscillator signal to process the input signal,
wherein before the step of determining whether the energy ratio of the low-intermediate frequency interference signal to the low-intermediate frequency useful signal is greater than the first preset ratio, the method comprises:
acquiring energy of the low-intermediate frequency interference signal and energy of the low-intermediate frequency useful signal; and
calculating the energy ratio of the low-intermediate frequency interference signal to the low-intermediate frequency useful signal.