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    Signal receiver with adaptive soft information adjustment and associated signal processing method
    1.
    发明授权
    Signal receiver with adaptive soft information adjustment and associated signal processing method 有权

    公开(公告)号：US09787520B2

    公开(公告)日：2017-10-10

    申请号：US14990962

    申请日：2016-01-08

    Applicant: MStar Semiconductor, Inc.

    Inventor： Yu-Che Su ,  Tzu-Hsuan Huang ,  Tai-Lai Tung

    IPC: H04L25/06 ,  H04L27/38

    CPC classification number: H04L27/38 ,  H04L25/067

    Abstract: A signal receiver with adaptive software information adjustment of a communication system is provided. The signal receiver receives a modulated signal comprising a plurality of packets, and includes: a demodulating circuit, configured to demodulate the modulated signal to generate a plurality of sets of soft information corresponding to each packet; a software information adjusting circuit, coupled to the demodulating circuit, configured to adjust the sets of soft information according to a distribution of the sets of soft information corresponding to each packet; a quantizer, coupled to the soft information adjusting circuit, configured to quantize the adjusted sets of soft information to generate a plurality of sets of data; and a decoder, coupled to the quantizer, configured to decode the data.

    Apparatus and method for estimating carrier frequency offset for multipath signals
    2.
    发明授权
    Apparatus and method for estimating carrier frequency offset for multipath signals 有权

    公开(公告)号：US09923586B2

    公开(公告)日：2018-03-20

    申请号：US15401310

    申请日：2017-01-09

    Applicant: MStar Semiconductor, Inc.

    Inventor： Kuan-Chou Lee ,  Yu-Che Su ,  Tai-Lai Tung

    IPC: H04B1/10 ,  H04L27/00 ,  H04L27/26

    CPC classification number: H04B1/1081 ,  H04L27/0014 ,  H04L27/2657 ,  H04L27/2672

    Abstract: An apparatus for estimating carrier frequency offset for multipath signals includes an echo signal filtering circuit, an Mth power circuit, a spectrum generating circuit, a peak frequency determining circuit and a frequency offset determining circuit. The echo signal filtering circuit filters out an echo signal from an input signal to generate a filtered signal. The Mth power circuit performs an Mth power calculation on the filtered signal to generate an Mth power calculation result. The spectrum generating circuit generates an Mth power spectrum according to the Mth power calculation result. The peak frequency determining circuit determines a peak frequency corresponding to an amplitude peak from the Mth power spectrum. The frequency offset determining circuit determines an estimated carrier frequency offset according to the peak frequency.

    Device and method for handling bit allocation
    4.
    发明授权
    Device and method for handling bit allocation 有权

    公开(公告)号：US10028157B2

    公开(公告)日：2018-07-17

    申请号：US15016406

    申请日：2016-02-05

    Applicant: MStar Semiconductor, Inc.

    Inventor： Yu-Che Su ,  Tai-Lai Tung

    IPC: H04L12/26 ,  H04W24/08 ,  H04W72/08 ,  H04L5/00

    Abstract: A bit allocation device includes: a channel estimation unit, performing a channel estimation to generate a plurality of channel qualities of a plurality of subcarriers; a processing unit, coupled to the channel estimation unit, generating a first plurality of bit numbers of the plurality of subcarriers according to the plurality of channel qualities; and a control unit, coupled to the processing unit, generating a second plurality of bit numbers of the plurality of subcarriers according to the first plurality of bit numbers and an upper limit of a total bit number.

    RECEIVER CIRCUIT AND ASSOCIATED METHOD CAPABLE OF CORRECTING ESTIMATION OF SIGNAL-NOISE CHARACTERISTIC VALUE
    5.
    发明申请
    RECEIVER CIRCUIT AND ASSOCIATED METHOD CAPABLE OF CORRECTING ESTIMATION OF SIGNAL-NOISE CHARACTERISTIC VALUE 审中-公开
    接收电路和相关方法可以校正信号噪声特征值的估计

    公开(公告)号：US20160380658A1

    公开(公告)日：2016-12-29

    申请号：US14847084

    申请日：2015-09-08

    Applicant: MStar Semiconductor, Inc.

    Inventor： Yu-Che Su ,  Tai-Lai Tung

    IPC: H04B1/10 ,  H04B1/12

    CPC classification number: H04B1/1027 ,  H04B1/123 ,  H04L1/0003 ,  H04L25/0202 ,  H04L25/03 ,  H04L25/061

    Abstract: A receiver circuit capable of correcting an estimation of a signal-noise characteristic value (e.g., SNR) is provided. The receiver circuit includes an equalizer, a slicer, an estimation circuit and a correction circuit. The equalizer provides an equalized signal according to a received signal. The slicer interprets digital information in the equalized signal and accordingly provides a sliced signal. The estimation circuit provides an initial signal-noise characteristic value according to a difference between the equalized signal and the sliced signal. The correction circuit provides a corresponding correction value according to the initial signal-noise characteristic value, and corrects the initial signal-noise characteristic value according to the corresponding correction value to generate a corrected signal-noise characteristic value.

    Abstract translation: 提供了能够校正信号噪声特性值（例如，SNR）的估计的接收机电路。 接收机电路包括均衡器，限幅器，估计电路和校正电路。 均衡器根据接收到的信号提供均衡的信号。 切片器解释均衡信号中的数字信息，从而提供切片信号。 估计电路根据均衡信号和分片信号之间的差异提供初始信号噪声特性值。 校正电路根据初始信号噪声特性值提供对应的校正值，并根据对应的校正值校正初始信号噪声特性值，以产生校正的信号噪声特性值。

    Wireless receiving system and signal processing method thereof
    6.
    发明授权
    Wireless receiving system and signal processing method thereof 有权
    无线接收系统及其信号处理方法

    公开(公告)号：US09369400B2

    公开(公告)日：2016-06-14

    申请号：US14194898

    申请日：2014-03-03

    Applicant: MStar Semiconductor, Inc.

    Inventor： Teng-Han Tsai ,  Yu-Che Su ,  Tai-Lai Tung

    IPC: H04L12/911 ,  H04L27/26 ,  H04W56/00

    CPC classification number: H04L47/70 ,  H04L27/2656 ,  H04W56/003 ,  H04W56/0085

    Abstract: A wireless system including a decoding module, an estimating module and a searching module is provided. The decoding module receives and decodes a packet to generate a decoding result. The estimating module retrieves package length information from the decoding result, and estimates a transmission end time of the packet according to the packet length information. The searching module determines a search start time according to the transmission end time, and starts packet searching at the search start time.

    Abstract translation: 提供了包括解码模块，估计模块和搜索模块的无线系统。 解码模块接收并解码分组以产生解码结果。 估计模块从解码结果中检索包长度信息，并根据分组长度信息估计分组的传输结束时间。 搜索模块根据发送结束时间确定搜索开始时间，并且在搜索开始时间开始分组搜索。

    Method and device for symbol decision and digital receiver
    7.
    发明授权
    Method and device for symbol decision and digital receiver 有权

    公开(公告)号：US10063344B2

    公开(公告)日：2018-08-28

    申请号：US15485327

    申请日：2017-04-12

    Applicant: MStar Semiconductor, Inc.

    Inventor： Chia-Wei Chen ,  Yu-Che Su ,  Tai-Lai Tung

    IPC: H04L1/00 ,  H04L25/06 ,  H04L25/03 ,  H04L27/38

    Abstract: A symbol decision method includes: storing a look-up table (LUT) to a symbol decision circuit; receiving a first signal, and generating a coordinate signal set corresponding to the first signal according to the first signal, wherein the coordinate signal set is located in a first decision region; and reading the LUT according to the coordinate signal set to output a first symbol corresponding to the first signal, wherein the first symbol is a first constellation point corresponding to the first decision region.

    Signal detection method and device
    9.
    发明授权
    Signal detection method and device 有权

    公开(公告)号：US09979424B2

    公开(公告)日：2018-05-22

    申请号：US15219372

    申请日：2016-07-26

    Applicant: MStar Semiconductor, Inc.

    Inventor： Yu-Che Su ,  Tai-Lai Tung

    IPC: H04B3/00 ,  H04B1/10 ,  H04B3/54

    CPC classification number: H04B1/1036 ,  H04B3/542

    Abstract: A signal detection method includes: retrieving a first period component of a signal and at least one second period component adjacent to the first period component; squaring a subtraction result of the first period component and each of the at least one second period component to calculate at least one first square value to further obtain a first detection parameter; squaring an addition result of the first period component and each of the at least one second period component to calculate at least one second square value to further obtain a second detection parameter; dividing the second detection parameter by the first detection parameter to obtain a detection function; determining that the signal is detected when the value of the detection function is greater than or equal to a threshold, or else determining that the signal is not detected.

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