# US 11,121,680 B1 · All-digital transmitter with wideband beamformer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,121,680 B1 - Document ID: US11121680B1 - Status: Granted - Kind: B1 - Application number: 16/833,705 - Filed: 2020-03-30 - Published: 2021-09-30 - Granted: 2021-09-14 - Earliest claimed: 2020-03-30 - Assignees: Mitsubishi Electric Research Laboratories, Inc. - Applicants: Mitsubishi Electric Research Laboratories, Inc. - Inventors: Rui Ma; Sravan Kumar Pulipati - Web page: https://patentgrep.com/patent/US11121680B1 ## CPC - H03F 3/195: in integrated circuits - H04B 1/0007: {wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage} - H03F 3/24: of transmitter output stages - H03H 17/0273: {Polyphase filters} - H04B 1/0053: {with common antenna for more than one band} - H04B 7/0617: {for beam forming} - H03F 2200/331: Sigma delta modulation being used in an amplifying circuit - H03F: AMPLIFIERS - H04B: TRANSMISSION - H03H: IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS (waveguides, resonators, lines or other devices of the waveguide type H01P) ## Abstract An all-digital transmitter (ADT) is provided. The ADS includes a baseband interface configured to store and transmit an (baseband) input signal at a corresponding frequency band, a polyphase finite impulse response filter configured to receive and convert the baseband input signal into different phases, a digital upconverter configured to upconvert each of the different phase baseband input signal to a predetermined carrier frequency in a digital domain, a set of multi-core 2-dimensional network-resonant digital plane wave beamfilters, wherein each of the multi-core 2D NR-DPW beamfilters is configured to transmit the upconverted baseband input signal by a target angle, a multi-core delta-sigma modulator configured to encode the upconverted input signal into pulsating signals, and a serializer configured to serialize the encoded pulsating signals into a RF bitstream. ## Claims ### Claim 1 An all-digital transmitter (ADT) comprising: a baseband interface configured to store and transmit an (baseband) input signal at a corresponding frequency band; a polyphase finite impulse response (FIR) filter configured to receive and convert the baseband input signal (samples) into different phases; a digital upconverter configured to upconvert each of the different phase baseband input signal to a predetermined carrier frequency in a digital domain; a set of multi-core 2-dimensional (2D) network-resonant digital plane wave (NR-DPW) beamfilters, wherein each of the multi-core 2D NR-DPW beamfilters includes a low-pass LC-ladder circuit, wherein each of the multi-core 2D NR-DPW beamfilters is configured to transmit the upconverted baseband input signal by a target angle; a multi-core delta-sigma modulator (DSM) configured to encode the upconverted input signal into pulsating signals; and a serializer configured to serialize the encoded pulsating signals into a RF bitstream. ### Claim 2 (depends on 1) The ADT of claim 1, wherein the DUC performs a mixing operation by applying the baseband data to a polyphase Digital Direct Synthesis (DDS) unit. ### Claim 3 (depends on 1) The ADT of claim 1, wherein the multi-core beam filter comprises: input ports configured to acquire upconverted digital signals having different phases, wherein a number of the input ports is identical to a number of the phases of the upconverted digital signals; a set of multi-core 2-dimensional (2D) network-resonant digital plane wave (NR-DPW) beamfilters connected to the input ports, wherein a number of the multi-core 2D NR-DPW beamfilters is identical to the number of phases; and output ports connected to the 2D NR-DPW beamfilters, wherein each of the output ports is connected to one of input ports of a multi-core-DSM modulator. ### Claim 4 (depends on 3) The ADT of claim 3, wherein each of the multi-core 2D NR-DPW beamfilters is configured to have filter parameters to transmit signals at the target angle. ### Claim 5 (depends on 3) The ADT of claim 3, wherein the multi-core 2D NR-DPW beamfilters are arranged to at least two modules. ### Claim 6 A multi-core beamforming circuit comprising: input ports configured to acquire upconverted digital signals having different phases, wherein a number of the input ports is identical to a number of the phases of the upconverted digital signals; a set of multi-core 2-dimensional (2D) network-resonant digital plane wave (NR-DPW) beamfilters connected to the input ports, wherein a number of the multi-core 2D NR-DPW beamfilters is identical to the number of phases; and output ports connected to the 2D NR-DPW beamfilters, wherein each of the output ports is connected to one of input ports of a multi-core-DSM modulator. ### Claim 7 (depends on 6) The multi-core beamforming circuit of claim 6, wherein each of the multi-core 2D NR-DPW beamfilters is configured to have filter parameters to transmit signals at the target angle. ### Claim 8 (depends on 6) The multi-core beamforming circuit of claim 6, wherein the multi-core 2D NR-DPW beamfilters are arranged to at least two modules. ### Claim 9 (depends on 8) The multi-core beamforming circuit of claim 8, wherein the at least two modules are configured recursively as a parallel processing array. ### Claim 10 (depends on 8) The multi-core beamforming circuit of claim 8, wherein outputs from one of the at least two modules are passed to a next stage of another module. ### Claim 11 (depends on 6) The multi-core beamforming circuit of claim 6, wherein each of the multi-core 2D NR-DPW beamfilters includes a low-pass LC-ladder circuit. ### Claim 12 An all-digital transmitter (ADT) comprising: a baseband interface configured to store and transmit an (baseband) input signal at a corresponding frequency band; a polyphase finite impulse response (FIR) filter configured to receive and convert the baseband input signal (samples) into different phases; a digital upconverter configured to upconvert each of the different phase baseband input signal to a predetermined carrier frequency in a digital domain; a set of multi-core 2-dimensional (2D) network-resonant digital plane wave (NR-DPW) beamfilters, wherein each of the multi-core 2D NR-DPW beamfilters is configured to transmit the upconverted baseband input signal by a target angle; a multi-core delta-sigma modulator (DSM) configured to encode the upconerted input signal into pulsating signals, wherein the multi-core beam filter comprises: input ports configured to acquire upconverted digital signals having different phases, wherein a number of the input ports is identical to a number of the phases of the upconverted digital signals; a set of multi-core 2-dimensional (2D) network-resonant digital plane wave (NR-DPW) beamfilters connected to the input ports, wherein a number of the multi-core 2D NR-DPW beamfilters is identical to the number of phases; and output ports connected to the 2D NR-DPW beamfilters, wherein each of the output ports is connected to one of input ports of a multi-core-DSM modulator; and a serializer configured to serialize the encoded pulsating signals into a RF bitstream. ### Claim 13 (depends on 12) The ADT of claim 12, wherein each of the multi-core 2D NR-DPW beamfilters is configured to have filter parameters to transmit signals at the target angle. ### Claim 14 (depends on 12) The ADT of claim 12, wherein the multi-core 2D NR-DPW beamfilters are arranged to at least two modules.