公开(公告)号：US11456792B1

公开(公告)日：2022-09-27

申请号：US17390224

申请日：2021-07-30

Applicant: Raytheon Company

Inventor： Thomas Comberiate ,  Zachary Dunn ,  Benjamin Plotner

IPC: H04B7/06 ,  H04L25/02 ,  H03F3/24 ,  H04B7/08

Abstract: A method of beamforming is provided. A single non-linear equalization (NLEQ) coefficient set is generated in beamspace, the single NLEQ coefficient set configured to characterize non-linear behavior of a system having an array of N elements. M parallel digital signals are received, for transmission by N channels, respectively, the N channels corresponding to the N elements. Each of the M respective parallel digital signals are equalized, using an NLEQ filter based on the single NLEQ coefficient set, wherein the single NLEQ coefficient set is used for each of the N elements and wherein the equalizing is configured to generate a set of M linearized parallel digital signals. Using a single summer, the M linearized parallel digital signals are summed, to produce one or more beamspace channelized output signals.

公开(公告)号：US10536302B1

公开(公告)日：2020-01-14

申请号：US16122733

申请日：2018-09-05

Applicant: RAYTHEON COMPANY

Inventor： Harry B. Marr ,  Zachary Dunn

IPC: H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08 ,  H04L25/03 ,  H04L25/02

Abstract: System and method for beamspace nonlinear equalization in a plurality of parallel channels includes: receiving M parallel signals for transmission by N channels, respectively, wherein M is an integer greater than or equal to 1 and N is an integer greater than 1; performing a linear transfer function on each of the M parallel signal by a finite impulse response (FIR) filter; adding FIR filter tap outputs to each M parallel signals, respectively; phase shifting an output of a respective FIR filter per each of the M parallel signals to generate M intermediate channelized output signals per each of the N channels; summing, by a single summer, the M intermediate channelized output signals across the N channels to produce M channelized polyphase output signals; serializing the M channelized polyphase output signals to generate serialized M polyphase output signals; and equalizing the serialized M polyphase output signals to produce a linearized signal in beamspace.

公开(公告)号：US20230361807A1

公开(公告)日：2023-11-09

申请号：US18310614

申请日：2023-05-02

Applicant: Raytheon Company

Inventor： Zachary Dunn

IPC: H04B1/405 ,  H04B1/04 ,  H04B1/12

CPC classification number: H04B1/405 ,  H04B1/0483 ,  H04B1/126

Abstract: A simultaneous transmit and receive (STAR) system comprises a plurality of radiating elements and a plurality of antenna transmit/receive (T/R) elements. The plurality of antenna T/R elements are each in operable communication with a respective radiating element. Each T/R element comprises a transmit channel, a receive channel, a switch, and a directional coupler. The directional coupler comprises an RF input in operable communication with an antenna array receiving signals, an RF output coupling the received signals to an input of the receive channel, and a coupled input operably coupled to the switch. If the switch is set to a predetermined state, the respective transmit channel couples an active cancellation signal to the coupled input of the directional coupler to cancel at least some coupling effects arising on an input to the receive channel, arising from operation of at least some of the T/R elements in the array.