MaxLinear has filed a patent for a system that enhances receiver sensitivity in a base station. The system includes a receiver and a processing device that calibrates the output signal to generate a non-linear actuation input signal, improving intermodulation distortion. GlobalData’s report on MaxLinear gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on MaxLinear, Digital watermarking was a key innovation area identified from patents. MaxLinear's grant share as of September 2023 was 66%. Grant share is based on the ratio of number of grants to total number of patents.
Enhanced receiver sensitivity in a base station
A recently filed patent (Publication Number: US20230318648A1) describes a base station that is designed to enhance receiver sensitivity. The base station includes a receiver (Rx) that receives an Rx output signal in an Rx band. The Rx output signal contains two passive intermodulation (PIM) sources. The base station also includes a processing device that receives the Rx output signal and a crest factor reduction (CFR) output signal. The processing device identifies the PIM sources based on these signals and calibrates the CFR output signal to generate a non-linear actuation (NA) input signal. The processing device then uses an NA function on the NA input signal to generate an intermodulation distortion signal.
The patent also describes additional features of the base station. The processing device can calibrate the CFR output signal based on time delay coefficients, gain adjust coefficients, and phase adjust coefficients. It can also adjust the delay limits in the NA function based on the identification of the PIM sources and identify memory elements storing the delay limits. The processing device can further identify the PIM sources by analyzing cross-correlation peaks. It can also select a number of PIM sources to cancel in real-time and allocate them to different sets of nonlinear terms in the NA function.
In another embodiment, the base station includes a diagnostic receiver (dRx) path that receives a dRx output signal with an external source. The processing device calibrates the dRx output signal based on the Rx output signal to generate a dRx NA input signal and uses a dRx NA function to generate a dRx intermodulation distortion signal. The base station also includes a transmit (Tx) path that transmits a CFR output signal in a Tx band. The processing device can calibrate the CFR output signal based on the Rx output signal to generate a Tx NA input signal and use a Tx NA function to generate a Tx intermodulation distortion signal.
Overall, this patent describes a base station with enhanced receiver sensitivity that can identify and cancel PIM sources to reduce intermodulation distortion. It also includes various calibration and adjustment mechanisms to optimize the performance of the base station.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
