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    Wideband subcarrier wireless transceiver circuits and systems
    3.
    发明授权
    Wideband subcarrier wireless transceiver circuits and systems 有权

    公开(公告)号：US10708012B1

    公开(公告)日：2020-07-07

    申请号：US16271808

    申请日：2019-02-09

    申请人： Jason Brent ,  Dengkui Zhu ,  Ping Liang

    发明人： Jason Brent ,  Dengkui Zhu ,  Ping Liang

    IPC分类号： H04L27/26 ,  H04J11/00 ,  H04B7/024 ,  H04L5/00 ,  H04W72/04

    摘要： This invention discloses methods and circuits of wideband wireless transmitting and/or receiving by combining multiple RF transmitters and/or receivers, or multiple transceivers, each of which has a narrower bandwidth, e.g., producing a RF transmitter and receiver or a RF transceiver whose signal bandwidth is the sum or approximately the sum, e.g., slightly less than the sum, of the signal bandwidth of the multiple RF transmitters and/or receivers, or multiple RF transceivers. The embodiments apply in wireless communication systems with orthogonal or approximately orthogonal subcarrier type of modulation (OSM), e.g., Orthogonal Frequency Division Multiplexing (OFDM).

    Enhanced SRS for massive MIMO channel estimation
    4.
    发明授权
    Enhanced SRS for massive MIMO channel estimation 有权

    公开(公告)号：US10171217B2

    公开(公告)日：2019-01-01

    申请号：US15537877

    申请日：2016-01-16

    申请人： Jason Brent ,  Dengkui Zhu ,  Ping Liang

    发明人： Jason Brent ,  Dengkui Zhu ,  Ping Liang

    IPC分类号： H04L5/00 ,  H04B7/04 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/06 ,  H04W72/04

    摘要： This invention provides SRS transmission methods to meet the Massive MIMO systems requirements. These methods are described in two separate categories. Firstly, enhancements to multiplex more channels in the same resources for a given SRS transmission and to provide Massive MIMO throughput performance improvements. Secondly, scheduling enhancements to provide adaptive UE-specific scheduling based on channel conditions for each UE. These methods can be combined in different ways in each BS to optimize the channel estimation system capacity for a given level of system performance.

    Massive MIMO channel emulator
    7.
    发明授权
    Massive MIMO channel emulator 有权

    公开(公告)号：US10454594B2

    公开(公告)日：2019-10-22

    申请号：US16077479

    申请日：2017-02-17

    申请人： Ping Liang

    发明人： Ping Liang ,  Jason Brent ,  Dengkui Zhu

    IPC分类号： H04B17/00 ,  H04B7/0452 ,  H04B17/391

    摘要： This invention presents a RF channel emulator for testing a large-scale Multiple-User Multiple-Input Multiple-Output (MU-MIMO) wireless communication system, including embodiments of using over-the-air channels for connecting a RF channel emulator and a large-scale MU-MIMO wireless communication system, calibration processes that maintain the over-the-air channel reciprocity, and emulation of carrier aggregation.

    Text telephone modem communications over packet networks
    8.
    发明申请
    Text telephone modem communications over packet networks 有权
    通过分组网络的文本电话调制解调器

    公开(公告)号：US20050195801A1

    公开(公告)日：2005-09-08

    申请号：US11036627

    申请日：2005-01-13

    申请人： Keith Chu ,  Jason Brent

    发明人： Keith Chu ,  Jason Brent

    IPC分类号： H04L12/66 ,  H04L29/06 ,  H04M11/06 ,  H04L12/28

    CPC分类号： H04L12/66 ,  H04L29/06 ,  H04L69/18 ,  H04M11/06

    摘要： A modem detection method is provided for use by a first gateway, the first gateway capable of communicating with a second gateway over a packet network. The method comprises setting the first gateway to a voice mode having a first coding scheme, encoding an input signal using the first coding scheme to generate a first encoded input signal, transmitting the first encoded input signal to the second gateway over the packet network, looking for a first tone in the input signal while the first gateway is in the voice mode, wherein the first tone is indicative of a beginning of a character, detecting the first tone in the input signal; setting the first gateway from the voice mode to a modem mode in response to the detecting; and transmitting the input signal to the second gateway according to the modem mode.

    摘要翻译： 提供调制解调器检测方法供第一网关使用，第一网关能够通过分组网络与第二网关进行通信。 该方法包括将第一网关设置为具有第一编码方案的语音模式，使用第一编码方案对输入信号进行编码以产生第一编码输入信号，通过分组网络将第一编码输入信号发送到第二网关， 当所述第一网关处于所述语音模式时，对于所述输入信号中的第一音调，其中所述第一音调表示字符的开始，检测所述输入信号中的所述第一音调; 响应于检测将第一网关从语音模式设置为调制解调器模式; 以及根据调制解调器模式将输入信号发送到第二网关。

    Method and apparatus for detecting and determining characteristics of a digital channel in a data communication system
    9.
    发明授权
    Method and apparatus for detecting and determining characteristics of a digital channel in a data communication system 有权
    用于检测和确定数据通信系统中的数字信道特性的方法和装置

    公开(公告)号：US06574280B1

    公开(公告)日：2003-06-03

    申请号：US09361872

    申请日：1999-07-27

    申请人： Thomas Liau ,  Jason Brent ,  Zhenyu Zhou

    发明人： Thomas Liau ,  Jason Brent ,  Zhenyu Zhou

    IPC分类号： H04B1404

    CPC分类号： H04L25/4927 ,  H04L29/06 ,  H04L69/24 ,  H04M11/06

    摘要： An initialization procedure for a digital modem system treats the presence of ADPCM as if it were a digital impairment such that the modem system can utilize effective compensation techniques to address the ADPCM. The modem system initially determines whether the current communication channel is a fully digital channel. Next, the modem system determines whether the channel includes any ADPCM elements. If ADPCM is detected, then a digital impairment learning routine is performed to obtain the ADPCM compression characteristics and data rate. The digital impairment learning routine may use a single probing sequence to obtain the ADPCM characteristics while identifying any concurrent digital impairments such as RBS, digital pads, and encoding law conversions. Once the digital channel is characterized, the modem system may condition its transmitters and receivers in an appropriate manner to obtain an increased data rate.

    摘要翻译： 数字调制解调器系统的初始化程序将ADPCM的存在视为数字损害，使得调制解调器系统可以利用有效的补偿技术来解决ADPCM。 调制解调器系统最初确定当前通信信道是否是完全数字信道。 接下来，调制解调器系统确定信道是否包括任何ADPCM元素。 如果检测到ADPCM，则执行数字损伤学习程序以获得ADPCM压缩特性和数据速率。 数字损伤学习程序可以使用单个探测序列来获得ADPCM特征，同时识别任何并发的数字损伤，例如RBS，数字焊盘和编码法则转换。 一旦数字信道被表征，调制解调器系统可以以适当的方式调节其发射机和接收机以获得增加的数据速率。