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公开(公告)号：US11848806B2
公开(公告)日：2023-12-19
申请号：US18162141
申请日：2023-01-31
Applicant: Silicon Laboratories Inc.
Inventor： Frederic Pirot
CPC classification number: H04L27/2607 , H04B1/713 , H04L27/2605 , H04L27/2614 , H04L27/2627 , H04L27/2628 , H04L27/2649 , H04L27/2655
Abstract: In one embodiment, an apparatus includes: a radio frequency (RF) front end circuit to receive and downconvert a RF signal to a second frequency signal, the RF signal comprising an orthogonal frequency division multiplexing (OFDM) transmission; a digitizer coupled to the RF front end circuit to digitize the second frequency signal to a digital signal; and a baseband processor coupled to the digitizer to process the digital signal. The baseband circuit comprises a first circuit having a first plurality of correlators having an irregular comb structure, each of the first plurality of correlators associated with a carrier frequency offset and to calculate a first correlation on a first portion of a preamble of the OFDM transmission.
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Patent Agency Ranking
公开(公告)号：US20230179464A1
公开(公告)日：2023-06-08
申请号：US18162141
申请日：2023-01-31
Applicant: Silicon Laboratories Inc.
Inventor： Frederic Pirot
IPC: H04L27/26
CPC classification number: H04L27/2655 , H04L27/2605 , H04L27/2649
Abstract: In one embodiment, an apparatus includes: a radio frequency (RF) front end circuit to receive and downconvert a RF signal to a second frequency signal, the RF signal comprising an orthogonal frequency division multiplexing (OFDM) transmission; a digitizer coupled to the RF front end circuit to digitize the second frequency signal to a digital signal; and a baseband processor coupled to the digitizer to process the digital signal. The baseband circuit comprises a first circuit having a first plurality of correlators having an irregular comb structure, each of the first plurality of correlators associated with a carrier frequency offset and to calculate a first correlation on a first portion of a preamble of the OFDM transmission.
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公开(公告)号：US11558232B1
公开(公告)日：2023-01-17
申请号：US17536782
申请日：2021-11-29
Applicant: Silicon Laboratories Inc.
Inventor： Frederic Pirot
IPC: H04L27/26
Abstract: In one embodiment, an apparatus includes: a baseband processor having a preamble generation circuit to generate a preamble for an orthogonal frequency division multiplexing (OFDM) transmission, the preamble generation circuit to generate the preamble having a first portion comprising a first plurality of symbols, each of the first plurality of symbols having a plurality of carriers, where a subset of the plurality of carriers have non-zero values, the preamble generation circuit to generate the non-zero values using a sequence of complex values selected to optimize a peak-to-average power ratio (PAPR); a digital-to-analog converter (DAC) coupled to the baseband processor to convert the first plurality of symbols to analog signals; a mixer coupled to the DAC to upconvert the analog signals to radio frequency (RF) signals; and a power amplifier coupled to the mixer to amplify the RF signals.
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公开(公告)号：US11516057B1
公开(公告)日：2022-11-29
申请号：US17536806
申请日：2021-11-29
Applicant: Silicon Laboratories Inc.
Inventor： Frederic Pirot
Abstract: In one embodiment, an apparatus comprises: a baseband processor having a preamble generation circuit to generate a preamble for an orthogonal frequency division multiplexing (OFDM) transmission, the preamble generation circuit to generate the preamble having a first portion comprising a first plurality of symbols and a second portion comprising a second plurality of symbols, where the preamble generation circuit is to generate at least some of the second plurality of symbols having at least one frequency disruption between successive symbols of the second portion; a digital-to-analog converter (DAC) coupled to the baseband processor to convert the first plurality of symbols and the second plurality of symbols to analog signals; a mixer coupled to the DAC to upconvert the analog signals to radio frequency (RF) signals; and a power amplifier coupled to the mixer to amplify the RF signals.
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公开(公告)号：US20230096865A1
公开(公告)日：2023-03-30
申请号：US17536732
申请日：2021-11-29
Applicant: Silicon Laboratories Inc.
Inventor： Frederic Pirot
IPC: H04L27/26
Abstract: In one embodiment, an apparatus includes: a radio frequency (RF) front end circuit to receive and downconvert a RF signal to a second frequency signal, the RF signal comprising an orthogonal frequency division multiplexing (OFDM) transmission; a digitizer coupled to the RF front end circuit to digitize the second frequency signal to a digital signal; and a baseband processor coupled to the digitizer to process the digital signal. The baseband circuit comprises a first circuit having a first plurality of correlators having an irregular comb structure, each of the first plurality of correlators associated with a carrier frequency offset and to calculate a first correlation on a first portion of a preamble of the OFDM transmission.
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公开(公告)号：US11606240B1
公开(公告)日：2023-03-14
申请号：US17536732
申请日：2021-11-29
Applicant: Silicon Laboratories Inc.
Inventor： Frederic Pirot
IPC: H04L27/26
Abstract: In one embodiment, an apparatus includes: a radio frequency (RF) front end circuit to receive and downconvert a RF signal to a second frequency signal, the RF signal comprising an orthogonal frequency division multiplexing (OFDM) transmission; a digitizer coupled to the RF front end circuit to digitize the second frequency signal to a digital signal; and a baseband processor coupled to the digitizer to process the digital signal. The baseband circuit comprises a first circuit having a first plurality of correlators having an irregular comb structure, each of the first plurality of correlators associated with a carrier frequency offset and to calculate a first correlation on a first portion of a preamble of the OFDM transmission.
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