# US 12,003,259 B2 · Custom signal data generation in a radio system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,003,259 B2 - Document ID: US12003259B2 - Status: Granted - Kind: B2 - Application number: 17/733,639 - Filed: 2022-04-29 - Published: 2023-11-02 - Granted: 2024-06-04 - Earliest claimed: 2022-04-29 - Assignees: Dell Products L.P. - Applicants: Dell Products L.P. - Inventors: John Bradley Deforge; Sewvanda Don; Tommy Ivarsson; Mikhail Shenouda - Web page: https://patentgrep.com/patent/US12003259B2 ## CPC - H04B 1/04: Circuits - H04L 27/362: {Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated (H04L27/366 takes precedence)} - H04B 17/14: of the whole transmission and reception path, e.g. self-test loop-back - H04B 17/15: Performance testing - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A system can comprise a memory that is configured to store and retrieve a first signal. The system can comprise a generator that is configured to generate first in-phase, quadrature sub-carrier values. The system can comprise a look up table that stores predetermined second in-phase, quadrature sub-carrier values. The system can comprise a pseudo-random look up table generator that is configured to operate on the predetermined second in-phase, quadrature sub-carrier values to produce pseudo-random data values. The system can comprise a component that is configured to inject a second signal into a radio unit, wherein the second signal is selected from the memory, the generator, the look up table, and the pseudo-random look up table generator, and wherein the second signal is configurably switched between a time domain path of a digital front end of the system, and a frequency domain path of the digital front end. ## Claims ### Claim 1 A system, comprising: a memory that is configured to store and retrieve a first signal; a generator that is configured to generate first in-phase, quadrature sub-carrier values; a look up table that stores predetermined second in-phase, quadrature sub-carrier values; a pseudo-random look up table generator that is configured to operate on the predetermined second in-phase, quadrature sub-carrier values to produce pseudo-random data values; and a component that is configured to inject a second signal into a radio unit used by the system, wherein the second signal is selected from the memory, the generator, the look up table, and the pseudo-random look up table generator, and wherein the second signal is configurably switched between a time domain path of a digital front end of the system, and a frequency domain path of the digital front end. ### Claim 2 (depends on 1) The system of claim 1, wherein the component is configured to inject the second signal into a time domain path of the radio unit. ### Claim 3 (depends on 1) The system of claim 1, wherein the component is configured to inject the second signal into a frequency domain path of the radio unit. ### Claim 4 (depends on 1) The system of claim 1, further comprising: a resource element masking component that is configured to mask at least part of the second signal before the second signal is injected into the radio unit. ### Claim 5 (depends on 4) The system of claim 4, further comprising: a buffer component that is configured to buffer at least part of the second signal before the second signal is injected into the radio unit. ### Claim 6 (depends on 1) The system of claim 1, further comprising: a time alignment component that is configured to align the second signal with a time boundary of the radio before the second signal is injected into the radio unit. ### Claim 7 (depends on 1) The system of claim 1, further comprising: a combination component that is configured to combine the second signal with live-air data after the second signal is injected into the radio unit. ### Claim 8 A method, comprising: selecting, by a system comprising a processor, a first signal from, a memory that is configured to store and retrieve a second signal, a generator that is configured to generate first in-phase, quadrature sub-carrier values, a look up table that stores predetermined second in-phase, quadrature sub-carrier values, and a pseudo-random look up table generator that is configured to operate on the predetermined second in-phase, quadrature sub-carrier values to produce pseudo-random data values; and injecting, by the system, the first signal into a radio unit used by the system, wherein the second signal is configurably switched between a time domain path of a digital front end of the system, and a frequency domain path of the digital front end. ### Claim 9 (depends on 8) The method of claim 8, wherein the predetermined second in-phase, quadrature sub-carrier values represent respective components of a constellation of a respective modulation coding scheme level. ### Claim 10 (depends on 8) The method of claim 8, wherein the pseudo-random look up table generator is configured to select values from the look up table randomly to generate a resource block matrix of signal data. ### Claim 11 (depends on 8) The method of claim 8, wherein the generator is configured to generate signed data pairs of arbitrary sub carrier values for a selected multi carrier system. ### Claim 12 (depends on 8) The method of claim 8, further comprising: combining, by the system, data representing the first signal with live-air signal data representing a live-air signal used by system. ### Claim 13 (depends on 8) The method of claim 8, wherein data representing the first signal comprises live-air signal data representing a live-air signal used by the system. ### Claim 14 (depends on 8) The method of claim 8, wherein the first signal comprises custom-only data that is maintained separate from live-air signal data representing a live-air signal used by the radio unit. ### Claim 15 (depends on 8) The method of claim 8, further comprising: reading, by the system, a third signal from the radio unit, wherein the third signal is generated based on the first signal; and determining, by the system, a performance metric of the radio unit based on a comparison of the first signal and the third signal. ### Claim 16 (depends on 8) The method of claim 8, further comprising: injecting, by the system, the first signal into the radio unit at a natural data rate of a receiving digital front end block of the radio unit. ### Claim 17 An apparatus, comprising: a radio unit; a signal generation component configured to generate a first signal, wherein the first signal is separate from a second signal that comprises live-air data; and an injection component that is configured to inject the first signal into the radio unit, wherein the first signal is configurably switched between a time domain path of a digital front end of the apparatus, and a frequency domain path of the digital front end. ### Claim 18 (depends on 17) The apparatus of claim 17, further comprising: a time alignment component that is configured to trigger and time-align the first signal prior to being inserted into the radio unit. ### Claim 19 (depends on 18) The apparatus of claim 18, wherein the time alignment component is configured to time-align the first signal on a symbol-by-symbol basis in the frequency domain path. ### Claim 20 (depends on 17) The apparatus of claim 17, wherein the injection component is configured to insert the first signal into the first radio unit in a frequency domain portion of a down link chain of the radio unit.