Abstract: A method and apparatus are disclosed for searching for a radar signal within signals received by a wireless device. The wireless device may receive signals within a first frequency segment and a second frequency segment, which is adjacent to the first frequency segment. The wireless device may determine Fast Fourier Transform (FFT) bins associated with the first frequency segment and the second frequency segment. The wireless device may combine the FFT bins associated with the first frequency segment and the second frequency segment and may search for the radar signal within the combined FFT bins.

Abstract: A method and apparatus are disclosed for searching for a radar signal within signals received by a wireless device. The wireless device may receive signals within a first frequency segment and a second frequency segment, which is adjacent to the first frequency segment. The wireless device may determine Fast Fourier Transform (FFT) bins associated with the first frequency segment and the second frequency segment. The wireless device may combine the FFT bins associated with the first frequency segment and the second frequency segment and may search for the radar signal within the combined FFT bins.

Abstract: A method and apparatus are disclosed for searching for a radar signal within signals received by a wireless device. The wireless device may receive signals within a first frequency segment and a second frequency segment, which is adjacent to the first frequency segment. The wireless device may search for the radar signal within the first frequency segment or the second frequency segment based, at least in part, on Fast Fourier Transform bins associated with the received signals.

Abstract: A method and apparatus are disclosed for searching for a radar signal within signals received by a wireless device. The wireless device may receive signals within a first frequency segment and a second frequency segment. The first frequency segment and the second frequency segment may be non-contiguous. The wireless device may determine energy within the first frequency segment and the second frequency segment and may detect a strong signal event with the first and/or the second frequency segments. In response to detecting the strong signal event, the wireless may search for the radar signal based, at least in part, on the determined energy within the first frequency segment and the second frequency segment and the strong signal event.

Abstract: This disclosure includes systems and methods for detecting radar signals by performing an initial spectral analysis to identify candidate radar signals and subsequently determining whether any candidate radar signals are false detections using a secondary analysis.

Abstract: A network device is disclosed for determining whether a received signal includes a radar signal. The network device can determine a beginning of a pulse within the signal as the time instant at which a power level of the signal exceeds an upper threshold. The network device can determine an end of the pulse as the time instant at which a drop in the power level associated with the signal exceeds a power drop threshold. The network device determines whether the pulse is part of the radar signal based, at least in part, on the beginning of the pulse and the end of the pulse. In some embodiments, the network device may cancel a DC offset from the signal prior to determining whether the signal includes a radar signal.

Abstract: Radar signals can be detected by a Wireless Local Area Network (WLAN) receiver by modifying one or more pattern matching attributes. In one embodiment, the pattern matching attributes are modified when signal pulses received by the WLAN receiver are determined to have an increased likelihood of being radar signals. In one embodiment, a frequency variance of received signal pulses is used to determine the likelihood of received signal pulses being radar signals. The frequency variance is based, at least in part, on frequencies of Fast Fourier Transforms of the received signal pulses.

Abstract: A wireless device operating within a wireless communication channel can detect radar signals in one or more sub-channels using sub-channel counter information. The wireless device can receive signal pulses and generate Fast Fourier Transform values based on the signal pulses. The sub-channel counters can be incremented based on the Fast Fourier Transform values. The wireless device can determine whether the received signal pulses include a radar signal based, at least in part, on the values of the sub-channel counters.

Abstract: This disclosure includes systems and methods for detecting radar signals by performing an initial spectral analysis to identify candidate radar signals and subsequently determining whether any candidate radar signals are false detections using a secondary analysis.

Abstract: Radar signals can be detected by a Wireless Local Area Network (WLAN) receiver by modifying one or more pattern matching attributes. In one embodiment, the pattern matching attributes are modified when signal pulses received by the WLAN receiver are determined to have an increased likelihood of being radar signals. In one embodiment, a frequency variance of received signal pulses is used to determine the likelihood of received signal pulses being radar signals. The frequency variance is based, at least in part, on frequencies of Fast Fourier Transforms of the received signal pulses.

Abstract: A system and method for transmitter and receiver operation for multiple-input, multiple-output (MIMO) communications based on prior channel knowledge are provided. A method for receiver operations includes receiving a data block, determining if there is confidence in information related to a channel, detecting data in the data block with a first detector in response to determining that there is confidence in the information, and detecting the data in the data block with a second detector in response to determining that there is no confidence in the information. The data block is received over the channel.

Abstract: A system and method for MIMO communications is provided. A method includes receiving a data block of P matrices from a transmitter, and determining if operating conditions are met. The method also includes if operating conditions are not met, computing a test position, selecting a codeword based on the test position, and computing a metric. The metric may then be compared with an error radius to determine a validity of the codeword. If the codeword is invalid, another codeword is selected. If the codeword is valid, then the codeword is stored if all matrices have been evaluated, else another matrix is selected for evaluation. If matrices earlier in the data block have untested codewords while all codewords for a matrix being evaluated have been tested, backtracking may be performed. After the codewords for the data block have been found, the stored data may be outputted and processed.

Abstract: A system and method for MIMO communications is provided. A method includes receiving a data block of P matrices from a transmitter, and determining if operating conditions are met. The method also includes if operating conditions are not met, computing a test position, selecting a codeword based on the test position, and computing a metric. The metric may then be compared with an error radius to determine a validity of the codeword. If the codeword is invalid, another codeword is selected. If the codeword is valid, then the codeword is stored if all matrices have been evaluated, else another matrix is selected for evaluation. If matrices earlier in the data block have untested codewords while all codewords for a matrix being evaluated have been tested, backtracking may be performed. After the codewords for the data block have been found, the stored data may be outputted and processed.

Abstract: A system and method for transmitter and receiver operation for multiple-input, multiple-output (MIMO) communications based on prior channel knowledge are provided. A method for receiver operations includes receiving a data block, determining if there is confidence in information related to a channel, detecting data in the data block with a first detector in response to determining that there is confidence in the information, and detecting the data in the data block with a second detector in response to determining that there is no confidence in the information. The data block is received over the channel.