US 12,137,013 B2
Phasor IQ demodulation
Paul David Swanson, Santee, CA (US)
Filed by Naval Information Warfare Center Pacific, San Diego, CA (US)
Filed on Jan. 12, 2022, as Appl. No. 17/574,319.
Prior Publication US 2023/0224199 A1, Jul. 13, 2023
Int. Cl. H04L 27/22 (2006.01); H03M 1/12 (2006.01); H04L 27/38 (2006.01)
CPC H04L 27/22 (2013.01) [H03M 1/124 (2013.01); H04L 27/3881 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for demodulating an RF signal to polar in-phase and quadrature (IQ) components, comprising:
receiving an RF signal with an analog-to-digital converter and converting the RF signal with a sampling rate of 3 times an RF carrier frequency of the RF signal, thereby obtaining 3 adjacent samples per carrier frequency period of the RF signal; and
calculating the polar in-phase and quadrature (IQ) components of the RF signal as an IQ phasor phase angle and an IQ amplitude using the 3 adjacent samples per frequency period of the RF signal and a digital processor, wherein the IQ phasor phase angle and the IQ amplitude are calculated using addition, subtraction, multiplication, division and absolute value.