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    • 6. 发明授权
    • Angle of arrival using reduced number of receivers
    • US10056993B2
    • 2018-08-21
    • US15375739
    • 2016-12-12
    • Decawave Limited
    • Jeff ClancyCiarán McElroyMichael McLaughlin
    • H04B17/27H04L12/26H04L1/24
    • H04B17/27H04L1/246H04L43/16
    • In an ultra-wideband (“UWB”) receiver, a received UWB signal is periodically digitized as a series of ternary samples. During a carrier acquisition mode of operation, the samples are continuously correlated with a predetermined preamble sequence to develop a correlation value. When the value exceeds a predetermined threshold, indicating that the preamble sequence is being received, estimates of the channel impulse response (“CIR”) are developed. When a start-of-frame delimiter (“SFD”) is detected, the best CIR estimate is provided to a channel matched filter (“CMF”). During a data recovery mode of operation, the CMF filters channel-injected noise from the sample stream. Both carrier phase errors and data timing errors are continuously detected and corrected during both the carrier acquisition and data recovery modes of operation. The phase of the carrier can be determined by accumulating the correlator output before it is rotated by the carrier correction. By comparing the carrier phases of two receivers separated by a known distance, d, the angle of incidence, θ, of the signal can be determined. One or more receivers may be adapted to use multiple antennae, thus reducing the total number of receivers relative to the total number of antennae.
    • 9. 发明申请
    • CONVOLUTIONAL CODE FOR USE IN A COMMUNICATION SYSTEM
    • 在通信系统中使用的转换代码
    • US20110264988A1
    • 2011-10-27
    • US13092146
    • 2011-04-21
    • Michael McLaughlinBilly Verso
    • Michael McLaughlinBilly Verso
    • H03M13/03G06F11/10
    • H03M13/23H03M13/3769H03M13/41H03M13/6306H03M13/655H04L1/0054H04L1/08
    • In a communication system, a transmitter receives an input bit, and in response thereto, generates at least an n-bit codeword, each bit of which is generated by a respective one of n generators of which m are exactly the same, m being greater than n/2. A receiver comprises: m detectors, each adapted to receive the bit generated by a respective one of the m generators, and provide a respective one of m partial detection signals if a strength of the received bit exceeds a predetermined minimum threshold; and a majority logic element adapted to receive each of the m partial detection signals, and provide an output bit indicative of the input bit only if more than m/2 of the received m partial detection signals exceeds the minimum threshold.
    • 在通信系统中,发射机接收一个输入比特,响应于此产生至少一个n比特的码字,其中每个比特由n个发生器中的相应一个生成,其中m个m个正好相同,m个更大 比n / 2。 接收机包括:m个检测器,每个检测器适于接收由m个发生器中的相应一个发生器产生的位,并且如果接收到的比特的强度超过预定的最小阈值,则提供m个部分检测信号中的相应的一个; 以及多数逻辑元件,其适于接收每个所述m个部分检测信号,并且仅当接收到的m个部分检测信号的m / 2个超过最小阈值时才提供指示输入比特的输出比特。