公开(公告)号：US20210218614A1

公开(公告)日：2021-07-15

申请号：US17162200

申请日：2021-01-29

Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

Inventor： Seyed Mohammad Hossein Mohammadnezhad ,  Huan Wang ,  Payam Heydari

IPC: H04L27/36 ,  H04L27/00 ,  H04B1/04

Abstract: Methods, systems, and apparatuses provide a transmitter architecture that directly generates 4N-QAM constellation using a raw bit stream as input and that does not require a digital-to-analog converter (DAC) in the signal path.

公开(公告)号：US11968073B2

公开(公告)日：2024-04-23

申请号：US17597261

申请日：2020-06-17

Applicant: The Regents of the University of California

Inventor： Hossein Mohammadnezhad ,  Huan Wang ,  Payam Heydari

IPC: H04L27/36

CPC classification number: H04L27/361

Abstract: Aspects of quadrature phase shift keying for quadrature amplitude modulation are described. In some examples, quadrature phase shift keying signals are generated using quadrature phase shift keying modulators. The quadrature phase shift keying signals are combined in a combiner circuit to generate a quadrature amplitude modulation signal for wireless transmission.

公开(公告)号：US20250168051A1

公开(公告)日：2025-05-22

申请号：US19026969

申请日：2025-01-17

Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

Inventor： Huan Wang ,  Payam Heydari

IPC: H04L27/26

Abstract: Disclosed are example embodiments of a receiver. The receiver including a front-end amplification and filtering block configured to amplify a received signal and filter out a potential jammer signal from a communication channel. The receiver also including a quadrature mixer, coupled to the front-end amplification and filtering block, and configured to down-convert the amplified and filtered signal to baseband to generate a quadrature LO signal. Additionally, the receiver including a carrier synchronization loop configured to synchronize the quadrature LO signal and carrier phase of the received signal. The receiver also including a demodulator coupled to the quadrature mixer and the carrier synchronization loop.

公开(公告)号：US20250105787A1

公开(公告)日：2025-03-27

申请号：US18918437

申请日：2024-10-17

Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

Inventor： Huan Wang ,  Payam Heydari

IPC: H03D7/12

Abstract: Disclosed are example embodiments of harmonic mixer. The harmonic mixer including a multi-phase LO signal generator. Each phase of the multi-phase LO signal generator outputting an LO signal on a signal line. The harmonic mixer including a plurality of mixers. Each mixer of the plurality of mixers connected to a signal line. The mixer driven by an IF. The harmonic mixer including an output network coupled to the outputs of the plurality of mixers.