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1.发明公开公开(公告)号：US20240340213A1
公开(公告)日：2024-10-10
申请号：US18132908
申请日：2023-04-10
发明人： Mohyee MIKHEMAR , Alvin Lai LIN , Andrew J. BLANKSBY , Sudharshan SRINIVASAN , Ahmed SAYED , Wei-Hong CHEN , Arya BEHZAD
IPC分类号： H04L27/36
CPC分类号： H04L27/364
摘要： A transmitter includes a first digital-to-analog converter (DAC) circuit consisting of a first set of unary cells to mix a first set of digital input data with a first clock signal. A second DAC circuit includes a second set of unary cells to mix a second set of digital input data with a second clock signal. A third circuit provides signals to the first DAC circuit and the second DAC circuit to implement an assignment scheme to assign either an in-phase (I) component or a quadrature (Q) component to the first set of unary cells and the second set of unary cells. Based on the assignment scheme, the first set of digital input data include I-data and Q-data, and the second set of digital input data include I-data and Q-data.
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2.发明授权公开(公告)号：US12068904B2
公开(公告)日：2024-08-20
申请号：US17131823
申请日：2020-12-23
申请人： Intel Corporation
CPC分类号： H04L27/3863 , H03D3/009 , H04B1/0475 , H04L27/364
摘要： An apparatus and method for in-phase/quadrature (I/Q) imbalance correction in a transceiver. The apparatus includes an I/Q imbalance correction circuit and a correction coefficient generation circuit. The I/Q imbalance correction circuit is configured to modify I/Q data in a frequency domain using correction coefficients to generate corrected I/Q data. The correction coefficient generation circuit is configured to generate the correction coefficients for the I/Q imbalance correction circuit based on the I/Q data and reference data.
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公开(公告)号：US20240275660A1
公开(公告)日：2024-08-15
申请号：US18169548
申请日：2023-02-15
发明人： Oleg Popov
IPC分类号： H04L27/36
CPC分类号： H04L27/364 , H04L27/366
摘要： An apparatus for wireless communication is disclosed that performs zero-crossing-avoidance encoding for quadrature amplitude modulation. In an example aspect, the apparatus includes a polar transceiver configured to be coupled to an antenna. The polar transceiver is configured to transmit, via the antenna, data including multiple symbols associated with quadrature amplitude modulation. The multiple symbols include multiple sets of two consecutive symbols. An absolute value of a phase difference between the two consecutive symbols within each set of the multiple sets is substantially different than 180 degrees.
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公开(公告)号：US20240121142A1
公开(公告)日：2024-04-11
申请号：US17963604
申请日：2022-10-11
申请人： Chun Soo Park
发明人： Chun Soo Park
IPC分类号： H04L27/233 , H04L27/36
CPC分类号： H04L27/2334 , H04L27/364
摘要： An N-phase vector synthesis demodulator employing N number of mixers is presented. The received signal is mixed with locally generated N number of phase-shifted carrier signals at the N mixers, the individual phases of which are successively and equally 360°/N shifted. The final in-phase (I) and quadrature-phase (Q) signals are zero-force synthesized from the demodulated N-phase vector signals. Compared with the conventional I/Q demodulator that obtains the I and Q signals directly from two mixers of 0° and 90° carrier signal phases, the multi-phase demodulator provides significantly high linearities in the demodulated I and Q signals as the zero-force synthesizer performs an optimal combining of the N-phase demodulated signals while minimizing distortions, interferences, and noise.
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公开(公告)号：US11942974B2
公开(公告)日：2024-03-26
申请号：US17814117
申请日：2022-07-21
申请人： PHARROWTECH BV
发明人： Khaled Khalaf , Ahmet Tekin , Biagio Bisanti , Qixian Shi , Eric Duvivier
CPC分类号： H04B1/0475 , H04L27/364 , H04L27/3863
摘要： A method for calibrating a radio transceiver begins by injecting a low-frequency tone at a transmit power amplifier input of the radio transceiver, where the low frequency tone is at least an order of magnitude lower than the operating frequency of a local oscillator coupled to the transmitter input. The method continues by upconverting the low-frequency tone to produce a plurality of tones at a transmit power amplifier output and then determining which tone of the plurality of tones is a local oscillator feedthrough tone associated with a transmit power amplifier output and which tone of the plurality of tones is representative of an in-phase and quadrature (I/Q) imbalance associated with the transmit power amplifier output. The method continues by determining a DC offset, based on the local oscillator feedthrough tone, where the DC offset is representative of local oscillator feedthrough in the transmit power amplifier output and finally determining, based on the tone representative of an I/Q imbalance, an I/Q offset associated with the transmit power amplifier output.
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公开(公告)号：US11811579B2
公开(公告)日：2023-11-07
申请号：US18121735
申请日：2023-03-15
IPC分类号： H04W28/04 , H04L27/34 , H04L27/26 , H04L1/00 , H04L1/08 , H04L1/20 , H04L27/02 , H04L1/1607 , H04L1/1809 , H04L27/36
CPC分类号： H04L27/2691 , H04L1/0003 , H04L1/0019 , H04L1/0045 , H04L1/0047 , H04L1/0061 , H04L1/08 , H04L1/1607 , H04L1/1809 , H04L1/20 , H04L1/201 , H04L1/206 , H04L27/02 , H04L27/2614 , H04L27/34 , H04L27/364 , H04W28/04
摘要： Message faults are inevitable in the high-throughput environment of 5G and planned 6G. Retransmissions are costly in time and resources, while generating extra backgrounds and interference. Therefore, methods are disclosed for recovering a faulted message by identifying and correcting each mis-demodulated message element. The faulted message elements generally have substantially lower modulation quality than the correctly demodulated elements, and can be identified by determining the modulation quality of each received message element. If the number of faulted message elements is small, the receiver may correct them using a grid search tested by an associated error-detection code. If the number of faults exceeds a predetermined threshold, the receiver can request a retransmission, and then assemble a merged copy of the message by selecting the message element with the best modulation quality from each version. Substantial time and resources may be saved, and reliable communication may be restored despite poor reception.
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公开(公告)号：US20230336197A1
公开(公告)日：2023-10-19
申请号：US17814117
申请日：2022-07-21
申请人： PHARROWTECH BV
发明人： Khaled Khalaf , Ahmet Tekin , Biagio Bisanti , Qixian Shi , Eric Duvivier
CPC分类号： H04B1/0475 , H04L27/364 , H04L27/3863
摘要： A method for calibrating a radio transceiver begins by injecting a low-frequency tone at a transmit power amplifier input of the radio transceiver, where the low frequency tone is at least an order of magnitude lower than the operating frequency of a local oscillator coupled to the transmitter input. The method continues by upconverting the low-frequency tone to produce a plurality of tones at a transmit power amplifier output and then determining which tone of the plurality of tones is a local oscillator feedthrough tone associated with a transmit power amplifier output and which tone of the plurality of tones is representative of an in-phase and quadrature (I/Q) imbalance associated with the transmit power amplifier output. The method continues by determining a DC offset, based on the local oscillator feedthrough tone, where the DC offset is representative of local oscillator feedthrough in the transmit power amplifier output and finally determining, based on the tone representative of an I/Q imbalance, an I/Q offset associated with the transmit power amplifier output.
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公开(公告)号：US20230300017A1
公开(公告)日：2023-09-21
申请号：US18199399
申请日：2023-05-19
IPC分类号： H04L27/26 , H04L1/00 , H04W28/04 , H04L1/08 , H04L1/20 , H04L27/02 , H04L27/34 , H04L1/1607 , H04L1/1809 , H04L27/36
CPC分类号： H04L27/2691 , H04L1/0003 , H04W28/04 , H04L1/0019 , H04L1/0045 , H04L1/08 , H04L1/20 , H04L27/02 , H04L27/2614 , H04L27/34 , H04L1/0061 , H04L1/1607 , H04L1/0047 , H04L1/1809 , H04L1/201 , H04L1/206 , H04L27/364
摘要： A central challenge in next-generation 5G/6G networks is achieving high message reliability despite very dense usage and unavoidable signal fading at high frequencies. To provide enhanced fault detection, localization, and mitigation, the disclosed procedures can enable an AI model (or an algorithm derived from it) to discriminate between faulted and unfaulted message elements according to signal quality, modulation parameters, and other inputs. The AI model can estimate the likelihood that each message element is faulted, and predict the most probable corrected value, among other outputs. The AI model can also consider the quality of a demodulation reference used to demodulate the message, and the quality of the associated error-detection code. The AI model can also consider previously received messages to the same receiver, or messages of a similar type. Fault mitigation by the receiver can save substantial time and resources by avoiding a retransmission. Many other aspects are disclosed.
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公开(公告)号：US20180191384A1
公开(公告)日：2018-07-05
申请号：US15395033
申请日：2016-12-30
CPC分类号： H04B1/0475 , H03F1/0205 , H03F1/32 , H03F3/19 , H03F3/21 , H03F2200/451 , H03L7/08 , H04B3/06 , H04B2001/045 , H04L7/0331 , H04L27/364 , H04L27/367
摘要： A technique that reduces or eliminates trading-off power amplifier efficiency and costly external filtering in amplitude and phase modulated sinusoidal signal generation uses multi-phase outphasing and a multi-phase switching mode power amplifier to generate the amplitude and phase modulated sinusoidal signals. The technique combines multiple clock phases with sinusoidally weighted circuits of the switching mode power amplifier to improve amplitude and phase modulated sinusoidal signal generation.
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公开(公告)号：US09998315B2
公开(公告)日：2018-06-12
申请号：US15063954
申请日：2016-03-08
申请人： BlackBerry Limited
发明人： Shouxing Qu
IPC分类号： H04L27/26
CPC分类号： H04L27/2634 , H04L27/2637 , H04L27/265 , H04L27/2698 , H04L27/364
摘要： A method and apparatus for orthogonal frequency division multiplexing (OFDM) modulation includes separating a frequency-domain sequence of complex numbers into a first portion and a second portion that is disjoint with the first portion, each of the first portion and the second portion including a respective half of the complex numbers of the frequency-domain sequence, and generating a time-domain sequence having a real in-phase component that is a function of the first portion only, and an imaginary quadrature-phase component that is a function of the second portion only.
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