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公开(公告)号：EP3731478A3
公开(公告)日：2021-01-27
申请号：EP20170048.1
申请日：2020-04-17
申请人： NXP USA, Inc.
IPC分类号： H04L27/26 , H04B1/7183 , H04L27/14
摘要： An acquisition detector and method include a preamble detector configured to search in a plurality of symbols for a preamble match with a known preamble pattern when a power level of the input signal exceeds a determined noise threshold. The acquisition detector further includes a frame delimiter detector configured to search in the plurality of symbols for a frame delimiter match with a known frame delimiter pattern when the preamble match is identified and the power level of the input signal exceeds a determined noise threshold.
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公开(公告)号：EP3621259B1
公开(公告)日：2021-01-27
申请号：EP19195346.2
申请日：2019-09-04
发明人： NIE, Hong
IPC分类号： H04L27/14 , H04L27/20 , H04L27/233
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公开(公告)号：EP3414865B1
公开(公告)日：2021-01-20
申请号：EP17705973.0
申请日：2017-02-08
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14.发明公开
公开(公告)号：EP3701651A2
公开(公告)日：2020-09-02
申请号：EP18878231.2
申请日：2018-08-30
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公开(公告)号：EP3614638A1
公开(公告)日：2020-02-26
申请号：EP19192762.3
申请日：2019-08-21
IPC分类号： H04L27/14
摘要： A gaussian frequency shift keying (GFSK) detector for decoding a GFSK signal. The detector includes: a multi-symbol detector and a Viterbi decoder. The multi-symbol detector is configured to: receive a series of samples representing a received GFSK modulated signal; and generate, for each set of samples representing an N-symbol sequence of the GFSK modulated signal, a plurality of soft decision values that indicate the probability that the N-symbol sequence is each possible N-symbol pattern, wherein N is an integer greater than or equal to two. The Viterbi decoder is configured to estimate each N-symbol sequence using a Viterbi decoding algorithm wherein the soft decision values for the N-symbol sequence are used as branch metrics in the Viterbi decoding algorithm.
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公开(公告)号：EP3591918A1
公开(公告)日：2020-01-08
申请号：EP18868646.3
申请日：2018-05-10
发明人： ZHENG, Guiyan , YANG, Guanglun , CHEN, Guang , DING, Huan , SUN, Guoying , ZHANG, Shengwen , YAN, Bing , WANG, Guoying , MU, Zhenghui , LI, Zhiyu , LIU, Zhen , CHENG, Bangfeng
摘要： The present disclosure provides a method for transmitting data by using a fixed ground balise (500) or an switchable ground balise (600), which can meet requirements of onboard equipment and accurately send effective data information and can more effectively ensure running safety of a vehicle. The present disclosure further provides a fixed ground balise (500) or a switchable ground balise (600).
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公开(公告)号：EP3437281B1
公开(公告)日：2019-12-25
申请号：EP16712913.9
申请日：2016-03-31
发明人： WILHELMSSON, Leif , LOPEZ, Miguel
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公开(公告)号：EP2959596B1
公开(公告)日：2019-07-31
申请号：EP14711865.7
申请日：2014-02-25
申请人： Itron, Inc.
发明人： SEELY, Danny, Ray
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公开(公告)号：EP3298743B1
公开(公告)日：2019-03-20
申请号：EP15730877.6
申请日：2015-05-21
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公开(公告)号：EP2599217B1
公开(公告)日：2018-10-31
申请号：EP11812884.2
申请日：2011-05-03
申请人： Sensus USA Inc.
CPC分类号： H04L27/14 , H04L25/03012
摘要： A Gaussian Frequency Shift Key (GFSK) receiver includes a receiver front end to receive a GFSK-modulated signal and convert the received GFSK-modulated signal to a baseband frequency modulated signal, a channel filter to reduce channel interference which is adjacent to a desired channel of the baseband frequency modulated signal, a demodulator to demodulate the channel filtered baseband modulated signal and to recover a sequence of symbols, a digital filter to reduce inter-symbol interference (ISI) from the sequence of symbols, a slicer to produce symbol decisions based on the filtered sequence of symbols, and a symbol-to-bit mapper to map the symbol decisions to data bits.
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