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    Multiplexing of real time services and non-real time services for OFDM systems
    1.
    再颁专利
    Multiplexing of real time services and non-real time services for OFDM systems 有权

    公开(公告)号：USRE47228E1

    公开(公告)日：2019-02-05

    申请号：US14296081

    申请日：2014-06-04

    Applicant: QUALCOMM Incorporated

    Inventor： Ahmad Jalali ,  Jay R. Walton ,  Mark Wallace

    IPC: H04B7/02 ,  H04L27/26

    Abstract: Transmitter and receiver units for use in an OFDM communications system and configurable to support multiple types of services. The transmitter unit includes one or more encoders, a symbol mapping element, and a modulator. Each encoder receives and codes a respective channel data stream to generate a corresponding coded data stream. The symbol mapping element receives and maps data from the coded data streams to generate modulation symbol vectors, with each modulation symbol vector including a set of data values used to modulate a set of tones to generate an OFDM symbol. The modulator modulates the modulation symbol vectors to provide a modulated signal suitable for transmission. The data from each coded data stream is mapped to a respective set of one or more “circuits”. Each circuit can be defined to include a number of tones from a number of OFDM symbols, a number of tones from a single OFDM symbol, all tones from one or more OFDM symbols, or some other combination of tones. The circuits can have equal size or different sizes. Different circuits can be used for full rate data (e.g., active speech) and low rate data (e.g., silence periods).

    PILOTS FOR MIMO COMMUNICATION SYSTEMS
    3.
    发明申请
    PILOTS FOR MIMO COMMUNICATION SYSTEMS 有权
    用于MIMO通信系统的PILOTS

    公开(公告)号：US20150365147A1

    公开(公告)日：2015-12-17

    申请号：US14836620

    申请日：2015-08-26

    Applicant: QUALCOMM Incorporated

    Inventor： John Ketchum ,  Mark Wallace ,  J. Rodney Walton ,  Steven Howard

    IPC: H04B7/04 ,  H04L5/00 ,  H04L27/26

    CPC classification number: H04B7/0421 ,  H04B7/043 ,  H04B7/0615 ,  H04B7/0669 ,  H04B7/0684 ,  H04B7/0697 ,  H04B7/0854 ,  H04L1/0001 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0017 ,  H04L1/0071 ,  H04L1/0618 ,  H04L1/08 ,  H04L1/16 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/006 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/03343 ,  H04L27/2613 ,  H04L2027/0089 ,  H04W16/28 ,  H04W28/20 ,  H04W52/50

    Abstract: Pilots suitable for use in MIMO systems and capable of supporting various functions are described. The various types of pilot include—a beacon pilot, a MIMO pilot, a steered reference or steered pilot, and a carrier pilot. The beacon pilot is transmitted from all transmit antennas and may be used for timing and frequency acquisition. The MIMO pilot is transmitted from all transmit antennas but is covered with different orthogonal codes assigned to the transmit antennas. The MIMO pilot may be used for channel estimation. The steered reference is transmitted on specific eigenmodes of a MIMO channel and is user terminal specific. The steered reference may be used for channel estimation. The carrier pilot may be transmitted on designated subbands/antennas and may be used for phase tracking of a carrier signal. Various pilot transmission schemes may be devised based on different combinations of these various types of pilot.

    Abstract translation: 描述适用于MIMO系统并能够支持各种功能的飞行员。 各种类型的导频包括信标导频，MIMO导频，导向参考或导向导频，以及载波导频。 信标导频从所有发射天线发射，并可用于定时和频率采集。 MIMO导频是从所有发射天线发射的，但由分配给发射天线的不同正交码覆盖。 MIMO导频可以用于信道估计。 引导参考在MIMO信道的特定本征模式上发送，并且是用户终端特定的。 转向参考可用于信道估计。 载波导频可以在指定的子带/天线上发射，并且可以用于载波信号的相位跟踪。 可以基于这些各种类型的飞行员的不同组合来设计各种导频传输方案。

    Transmit power violation protection mechanism in a radio unit of a disaggregated base station
    4.
    发明授权
    Transmit power violation protection mechanism in a radio unit of a disaggregated base station 有权

    公开(公告)号：US11621752B1

    公开(公告)日：2023-04-04

    申请号：US17656706

    申请日：2022-03-28

    Applicant: QUALCOMM Incorporated

    Inventor： Ori Auslender ,  Christian Oliver Thelen ,  Afshin Shiravi ,  Mark Wallace

    IPC: H04B7/0456 ,  H04B7/0426 ,  H04W52/30

    Abstract: This disclosure provides systems, methods and apparatuses for protecting against transmit power violations in a radio unit (RU) of a disaggregated base station. For example, when a distributed unit (DU) provides frequency domain samples to the RU, the DU may set a reference input level that causes the RU scale a gain lineup to avoid saturation or sensitivity issues in a signal processing chain while ramping up to a required transmit power. Accordingly, to avoid signal saturation or clipping at the RU, the RU may monitor energy estimation measurements and take remedial action when a transmit power violation occurs. For example, the RU may provide one or more system alarms to the DU or prevent transmission over an air interface in cases where the energy estimation measurements fail to satisfy one or more thresholds.

    OFDM communication system with multiple OFDM symbol sizes
    6.
    发明授权
    OFDM communication system with multiple OFDM symbol sizes 有权
    具有多个OFDM符号大小的OFDM通信系统

    公开(公告)号：US09154274B2

    公开(公告)日：2015-10-06

    申请号：US13920971

    申请日：2013-06-18

    Applicant: QUALCOMM Incorporated

    Inventor： Jay Rod Walton ,  John W. Ketchum ,  Mark Wallace ,  Steven J. Howard

    IPC: H04L5/00 ,  H04W72/04 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04L1/00 ,  H04L25/02 ,  H04L27/26 ,  H04W28/20 ,  H04W52/50

    CPC classification number: H04L5/0007 ,  H04B7/0421 ,  H04B7/043 ,  H04B7/0669 ,  H04B7/0697 ,  H04B7/0854 ,  H04L1/0017 ,  H04L5/0023 ,  H04L5/0028 ,  H04L5/0037 ,  H04L25/0232 ,  H04L25/0248 ,  H04L27/2602 ,  H04W28/20 ,  H04W52/50 ,  H04W72/04

    Abstract: Techniques to use OFDM symbols of different sizes to achieve greater efficiency for OFDM systems. The system traffic may be arranged into different categories (e.g., control data, user data, and pilot data). For each category, one or more OFDM symbols of the proper sizes may be selected for use based on the expected payload size for the traffic in that category. For example, control data may be transmitted using OFDM symbols of a first size, user data may be transmitted using OFDM symbols of the first size and a second size, and pilot data may be transmitted using OFDM symbols of a third size or the first size. In one exemplary design, a small OFDM symbol is utilized for pilot and for transport channels used to send control data, and a large OFDM symbol and the small OFDM symbol are utilized for transport channels used to send user data.

    Abstract translation: 使用不同大小的OFDM符号来实现OFDM系统更高效率的技术。 系统业务可以被布置成不同的类别（例如，控制数据，用户数据和导频数据）。 对于每个类别，可以基于该类别中的业务的预期有效载荷大小来选择适当尺寸的一个或多个OFDM符号用于使用。 例如，可以使用第一大小的OFDM符号发送控制数据，可以使用第一大小和第二大小的OFDM符号发送用户数据，并且可以使用第三大小或第一大小的OFDM符号来发送导频数据 。 在一个示例性设计中，小OFDM符号用于导频和用于发送控制数据的传输信道，并且将大OFDM符号和小OFDM符号用于用于发送用户数据的传输信道。

    Coding scheme for a wireless communication system
    8.
    发明申请
    Coding scheme for a wireless communication system 有权
    无线通信系统的编码方案

    公开(公告)号：US20160043784A1

    公开(公告)日：2016-02-11

    申请号：US14885787

    申请日：2015-10-16

    Applicant: QUALCOMM Incorporated

    Inventor： Fuyun Ling ,  J. Rodney Walton ,  Mark Wallace ,  Ivan Fernandez ,  Naga Bhushan

    IPC: H04B7/04

    CPC classification number: H04B7/0417 ,  H04B7/0632 ,  H04L1/0009 ,  H04L1/0041 ,  H04L1/005 ,  H04L1/0055 ,  H04L1/0066 ,  H04L1/0068 ,  H04L1/0071 ,  H04L5/0023 ,  H04L5/0046 ,  H04L5/0048 ,  H04L5/006 ,  H04L25/03171 ,  H04L27/3488

    Abstract: Coding techniques for a (e.g., OFDM) communication system capable of transmitting data on a number of “transmission channels” at different information bit rates based on the channels' achieved SNR. A base code is used in combination with common or variable puncturing to achieve different coding rates required by the transmission channels. The data (i.e., information bits) for a data transmission is encoded with the base code, and the coded bits for each channel (or group of channels with the similar transmission capabilities) are punctured to achieve the required coding rate. The coded bits may be interleaved (e.g., to combat fading and remove correlation between coded bits in each modulation symbol) prior to puncturing. The unpunctured coded bits are grouped into non-binary symbols and mapped to modulation symbols (e.g., using Gray mapping). The modulation symbol may be “pre-conditioned” and prior to transmission.

    Abstract translation: 能够基于信道实现的SNR以不同的信息比特率在多个“传输信道”上发送数据的（例如，OFDM）通信系统的编码技术。 基本码与公共或可变的打孔组合使用以实现传输信道所需的不同的编码速率。 针对数据传输的数据（即，信息比特）用基本码进行编码，并且针对每个信道（或具有相似传输能力的信道组）的编码比特被打孔以实现所需的编码率。 在穿孔之前，编码比特可以被交织（例如，以抵消衰落并消除每个调制符号中的编码比特之间的相关性）。 未经穿孔的编码比特被分组成非二进制符号并映射到调制符号（例如，使用灰色映射）。 调制符号可以是“预调节”并且在传输之前。

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