Abstract: An electronic device, a method, and a chipset for receiving global navigation satellite system (GNSS) signals are provided. An input/output (I/O) mixer including a first multiplier and a second multiplier downconverts a modulated radio frequency wave to an intermediate frequency. The modulated radio frequency wave is input to first inputs of the first multiplier and the second multiplier, and where an in-phase signal, from a first digital to analog converter (DAC), and a quadrature phase signal, from a second DAC, are input to second inputs of the first multiplier and the second multiplier, respectively. A mixer imbalance between the first mixer and the second mixer is reduced using direct current (DC) bias voltages from the first DAC and the second DAC. The DC bias voltages are determined based on a first and second DAC codes of the first and second DACs. The downconverted modulated radio frequency wave is filtered.

Abstract: A global navigation satellite system (GNSS) receiver includes an internal signal processor configured to perform an internal signal processing operation on a satellite signal to generate satellite information, a switching circuit configured to transmit the satellite signal to the internal signal processor, and a control circuit configured to receive a blanking signal from an external communication device instructing that the internal signal processing operation is to be blocked, and configured to output control information for reducing transmission power of the external communication device and to control the switching circuit to transmit the satellite signal to the internal signal processor regardless of the blanking signal when a frequency at which the blanking signal is received exceeds a reference value.

Abstract: An electronic device, a method, and a chipset for receiving global navigation satellite system (GNSS) signals are provided. An input/output (I/O) mixer including a first multiplier and a second multiplier downconverts a modulated radio frequency wave to an intermediate frequency. The modulated radio frequency wave is input to first inputs of the first multiplier and the second multiplier, and where an in-phase signal, from a first digital to analog converter (DAC), and a quadrature phase signal, from a second DAC, are input to second inputs of the first multiplier and the second multiplier, respectively. A mixer imbalance between the first mixer and the second mixer is reduced using direct current (DC) bias voltages from the first DAC and the second DAC. The DC bias voltages are determined based on a first and second DAC codes of the first and second DACs. The downconverted modulated radio frequency wave is filtered.

Abstract: An electronic device, a method, and a chipset for receiving global navigation satellite system (GNSS) signals are provided. The electronic device includes a processor configured to: downconvert, by an input/output (I/O) mixer including a first multiplier and a second multiplier, a modulated radio frequency wave to an intermediate frequency, where the modulated radio frequency wave is input to first inputs of the first multiplier and the second multiplier, and where an in-phase signal and a quadrature phase signal based on a square wave are input to second inputs of the first multiplier and the second multiplier, respectively; filter the downconverted modulated radio frequency wave; and convert the filtered downconverted modulated radio frequency wave to a digital signal.

Abstract: A global navigation satellite system (GNSS) receiver includes an internal signal processor configured to perform an internal signal processing operation on a satellite signal to generate satellite information, a switching circuit configured to transmit the satellite signal to the internal signal processor, and a control circuit configured to receive a blanking signal from an external communication device instructing that the internal signal processing operation is to be blocked, and configured to output control information for reducing transmission power of the external communication device and to control the switching circuit to transmit the satellite signal to the internal signal processor regardless of the blanking signal when a frequency at which the blanking signal is received exceeds a reference value.

Abstract: An electronic device, a method, and a chipset for receiving global navigation satellite system (GNSS) signals are provided. The electronic device includes a processor configured to: downconvert, by an input/output (I/O) mixer including a first multiplier and a second multiplier, a modulated radio frequency wave to an intermediate frequency, where the modulated radio frequency wave is input to first inputs of the first multiplier and the second multiplier, and where an in-phase signal and a quadrature phase signal based on a square wave are input to second inputs of the first multiplier and the second multiplier, respectively; filter the downconverted modulated radio frequency wave; and convert the filtered downconverted modulated radio frequency wave to a digital signal.

Abstract: A method and apparatus is provided. The apparatus a processor configured to generate a first square wave, generate a second square wave, wherein the first square wave and the second square wave are driven by a reference frequency oscillator, modulate a radio frequency wave with the first square wave, downconvert the modulated radio frequency wave to an intermediate frequency, filter the downconverted modulated radio frequency wave, convert the filtered downconverted modulated radio frequency wave to a digital signal, and integrate the digital signal.

Abstract: Systems and methods for improving performance in terrestrial and satellite positioning systems. Signal processing systems and methods are described for selecting, from among a set of codes, certain codes having desired autocorrelation and/or cross-correlation properties. Systems and methods for generating, encoding, transmitting, and receiving signals using the selected codes are also described.

Abstract: Systems and techniques relating to processing multiple data streams include, according to at least one implementation, receiving a single bit stream during a SISO mode of transmission; receiving two or more bit streams during a MIMO mode of transmission, wherein different rotations are applied to dynamically changed second, third, and fourth ones of the two or more bit streams received during the MIMO mode of transmission to improve transmission robustness and transmission data rate; performing separate de-mapping of subcarriers in the two or more bit streams during the MIMO mode of transmission; performing separate de-interleaving of the two or more bit streams during the MIMO mode of transmission, wherein a first portion of a de-interleaver section that handles a first of the two or more bit streams employs a same de-interleaver operation as during the SISO mode of transmission; and combining the two or more bit streams.

Abstract: A method and apparatus is provided. The apparatus a processor configured to generate a first square wave, generate a second square wave, wherein the first square wave and the second square wave are driven by a reference frequency oscillator, modulate a radio frequency wave with the first square wave, downconvert the modulated radio frequency wave to an intermediate frequency, filter the downconverted modulated radio frequency wave, convert the filtered downconverted modulated radio frequency wave to a digital signal, and integrate the digital signal.

Abstract: Systems and methods for improving performance in terrestrial and satellite positioning systems. Signal processing systems and methods are described for selecting, from among a set of codes, certain codes having desired autocorrelation and/or cross-correlation properties. Systems and methods for generating, encoding, transmitting, and receiving signals using the selected codes are also described.

Abstract: An apparatus and a method are provided. The apparatus includes a receiver configured to receive a signal over channels, a channel estimator configured to estimate the channels as first channel estimates; and a processor configured to compress the channel estimates to reduce buffer size. The method includes receiving a signal over channels by a receiver, estimating, by a channel estimator, the channels as a first channel estimate; and compressing, by a processor, the channel estimates to reduce buffer size.

Abstract: An apparatus and a method are provided. The apparatus includes a receiver configured to receive a signal over channels, a channel estimator configured to estimate the channels as first channel estimates; and a processor configured to compress the channel estimates to reduce buffer size. The method includes receiving a signal over channels by a receiver, estimating, by a channel estimator, the channels as a first channel estimate; and compressing, by a processor, the channel estimates to reduce buffer size.

Abstract: Systems and methods for improving performance in terrestrial and satellite positioning systems are disclosed. Signal processing systems and methods are described for selecting, from among a set of codes, certain codes having desired autocorrelation and/or cross-correlation properties. Systems and methods for generating, encoding, transmitting, and receiving signals using the selected codes are also described.

Abstract: Systems and techniques relating to processing multiple data streams include, according to at least one implementation, an apparatus including a parser for a MIMO mode; an interleaver section coupled with the parser, configured to perform separate interleaving of bit streams during the MIMO mode, wherein a first portion of the interleaver section that handles a first of the two or more second bit streams employs a same interleaver operation as during a SISO mode of transmission; a subcarrier mapping section configured to perform separate mapping of subcarriers during the MIMO mode; and a transmit back end coupled with the subcarrier mapping section to connect with multiple antennas, the transmit back end configured to apply different rotations to dynamically changed second, third, and fourth ones of the two or more second bit streams transmitted over the multiple antennas during the MIMO mode to improve transmission robustness and transmission data rate.

Abstract: Systems and methods for improving performance in terrestrial and satellite positioning systems are disclosed. Signal processing systems and methods are described for selecting, from among a set of codes, certain codes having desired autocorrelation and/or cross-correlation properties. Systems and methods for generating, encoding, transmitting, and receiving signals using the selected codes are also described.

Abstract: Systems and techniques relating to processing multiple data streams include, according to an aspect, a method including interleaving data streams to be transmitted over a wireless channel, wherein the interleaving comprises performing a first permutation and a second permutation, and applying data rotations to the data streams in connection with the interleaving, wherein each of the data rotations has a constant rotation value for its corresponding stream index regardless of how many data streams are currently being transmitted, a second rotation value used for a second stream is larger than a first rotation value used for a first stream, a third rotation value used for a third stream is greater than the first rotation value but less than the second rotation value, and a fourth rotation value used for a fourth stream is greater than the second rotation value, and wherein the data rotations are applied after the second permutation.

Abstract: Devices, systems, and methods for improving performance in positioning systems are disclosed. Signal processing methods are described for selecting certain spreading codes having desired auto and/or cross-correlation properties and generating, transmitting, and receiving signals generated using the selected codes.

Abstract: Systems and methods for improving performance in terrestrial and satellite positioning systems are disclosed. Signal processing systems and methods are described for selecting, from among a set of codes, certain codes having desired autocorrelation and/or cross-correlation properties. Systems and methods for generating, encoding, transmitting, and receiving signals using the selected codes are also described.

Abstract: Systems and techniques relating to processing multiple include, according to at least one implementation, a method including obtaining data streams to be transmitted, and applying data rotations to the data streams in connection with interleaving the data streams, wherein each of the data rotations has a constant rotation value for its corresponding stream index regardless of how many data streams are currently being transmitted, a second rotation value used for a second stream is larger than a first rotation value used for a first stream and also large enough to maximize rotation distance between the first and second streams when the current transmission has two streams, a third rotation value used for a third stream is greater than the first rotation value but less than the second rotation value, and a fourth rotation value used for a fourth stream is greater than the second rotation value.