# US 2021/0242894 A1 · Apparatus for Receiver Using Multiple Modulation Schemes and Associated Methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0242894 A1 - Document ID: US20210242894A1 - Status: Published application - Kind: A1 - Application number: 17/138,850 - Filed: 2020-12-30 - Published: 2021-08-05 - Earliest claimed: 2019-10-30 - Assignees: Silicon Laboratories Inc. - Applicants: Silicon Laboratories Inc. - Inventors: Hendricus de Ruijter - Web page: https://patentgrep.com/patent/US20210242894A1 ## CPC - H04B 1/1638: {Special circuits to enhance selectivity of receivers not otherwise provided for (resonant circuits H03H)} - H04B 1/18: Input circuits, e.g. for coupling to an antenna or a transmission line (coupling networks between antennas or lines and receivers independent of the nature of the receiver H03H) - H04L 27/0008: {arrangements for allowing a transmitter or receiver to use more than one type of modulation (negotiating modulation type for two-way transmission paths H04L5/1453)} - H04L 27/0012: {arrangements for identifying the type of modulation} - H04L 27/14: Demodulator circuits; Receiver circuits - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract An apparatus includes a radio-frequency (RF) receiver for receiving RF signals. The RF receiver includes a plurality of modulation signal detectors (MSDs) to generate a plurality of detection signals when a plurality of RF signals modulated using a plurality of modulation schemes are detected. The RF receiver further includes a controller to cause reception of the plurality of RF signals in response to the plurality of detection signals. ## Claims ### Claim 1 An apparatus, comprising: a radio-frequency (RF) receiver for receiving RF signals, the RF receiver comprising: a plurality of modulation signal detectors (MSDs) to generate a plurality of detection signals when a plurality of RF signals modulated using a plurality of modulation schemes are detected; and a controller to cause reception of the plurality of RF signals in response to the plurality of detection signals. ### Claim 2 (depends on 1) The apparatus according to claim 1, wherein the plurality of MSDs comprises a plurality of preamble detectors. ### Claim 3 (depends on 1) The apparatus according to claim 1, wherein the plurality of MSDs comprise a plurality of synchronization (synch) word detectors. ### Claim 4 (depends on 1) The apparatus according to claim 1, wherein the plurality of MSDs operate concurrently to detect a plurality of different physical layers (PHYs). ### Claim 5 (depends on 1) The apparatus according to claim 1, wherein the plurality of MSDs operate concurrently to detect the plurality of RF signals modulated using a plurality of modulation schemes. ### Claim 6 (depends on 1) The apparatus according to claim 1, wherein the controller uses a plurality of demodulators to cause reception of the plurality of RF signals. ### Claim 7 (depends on 1) The apparatus according to claim 1, wherein the controller configures the RF receiver based on the plurality of the detection signals. ### Claim 8 (depends on 1) The apparatus according to claim 1, wherein the controller comprises a medium access controller (MAC) processor that is shared to receive the plurality of RF signals modulated using the plurality of modulation schemes. ### Claim 9 (depends on 1) The apparatus according to claim 1, wherein the plurality of modulation schemes comprises at least one of frequency shift keying (FSK), M-ary FSK, M-ary PSK, on-off keying (OOK), amplitude shift keying (ASK), quadrature phase shift keying (QPSK), offset quadrature phase shift keying (O-QPSK), binary phase shift keying (BPSK), 1/4pi QPSK, quadrature amplitude modulation (QAM), orthogonal frequency division multiplexing (OFDM), and chirp spread spectrum (CSS). ### Claim 10 An apparatus for communication using RF signals, the apparatus comprising: a transmitter to transmit a modulated RF signal, wherein transmitted information is modulated onto the modulated RF signal using one of a plurality of modulation schemes; and a receiver to receive packets from received modulated RF signals, the receiver comprising a plurality of modulation scheme detectors (MSDs) to generate a plurality of detection signals, wherein a packet is received by configuring the receiver based on a detection signal in the plurality of detection signals, wherein the detection signal is obtained from the packet. ### Claim 11 (depends on 10) The apparatus according to claim 10, comprising a controller to configure the receiver based on the plurality of detection signals to receive signals modulated using the plurality of modulation schemes. ### Claim 12 (depends on 10) The apparatus according to claim 10, wherein the plurality of MSDs detect the modulation schemes of received modulated RF signals during a preamble, a synchronization field, a start of frame delimiter (SFD), a short training field (STF), or a long training field (LTF) or a combination thereof. ### Claim 13 (depends on 10) The apparatus according to claim 10, further comprising a medium access controller (MAC) processor to process shared MAC functions to receive packets from received modulated RF signals. ### Claim 14 (depends on 10) The apparatus according to claim 10, wherein the plurality of modulation schemes comprises at least one of frequency shift keying (FSK), M-ary FSK, M-ary PSK, on-off keying (OOK), amplitude shift keying (ASK), quadrature phase shift keying (QPSK), offset quadrature phase shift keying (O-QPSK), binary phase shift keying (BPSK), 1/4pi QPSK, quadrature amplitude modulation (QAM), orthogonal frequency division multiplexing (OFDM), and chirp spread spectrum (CSS). ### Claim 15 A method of operating a radio-frequency (RF) receiver to receive RF signals, the method comprising: generating, by using a plurality of modulation signal detectors (MSDs) to generate a plurality of detection signals when a plurality of RF signals modulated using a plurality of modulation schemes are detected; and causing reception of the plurality of RF signals in response to the plurality of detection signals. ### Claim 16 (depends on 15) The method according to claim 15, wherein using a plurality of MSDs comprises using plurality of preamble detectors or a plurality of synchronization (synch) word detectors. ### Claim 17 (depends on 15) The method according to claim 15, comprising operating the plurality of MSDs concurrently to detect a plurality of different physical layers (PHYs). ### Claim 18 (depends on 15) The method according to claim 15, comprising operating the plurality of MSDs concurrently to detect the plurality of RF signals modulated using a plurality of modulation schemes. ### Claim 19 (depends on 15) The method according to claim 15, comprising configuring the RF receiver to receive an RF signal in the plurality of RF signals based on a modulation scheme used to modulate the RF signal. ### Claim 20 (depends on 15) The method according to claim 15, comprising wherein sharing a medium access controller (MAC) processor to receive the plurality of RF signals modulated using the plurality of modulation schemes.