公开(公告)号：WO2015171958A1

公开(公告)日：2015-11-12

申请号：PCT/US2015/029788

申请日：2015-05-07

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： WONG, Ian C. ,  NIEMAN, Karl F. ,  KUNDARGI, Nikhil U.

IPC: H04B7/04

CPC classification number: H04B7/0456 ,  H04B7/024 ,  H04B7/0413 ,  H04B7/0452 ,  H04L5/0048 ,  H04L7/0012 ,  H04L7/0025 ,  H04W56/00 ,  H04W88/08 ,  H04W88/085

Abstract: Techniques are disclosed relating to signaling and frame structure for massive MIMO communication systems. In some embodiments, an apparatus (102) is configured to receive an uplink pilot symbol from a mobile device (106) over a first channel (UL) and receive uplink data from the mobile device over the first channel, where the uplink data is included in one or more orthogonal frequency division multiplexing (OFDM) symbols at a symbol rate. In these embodiments, the apparatus is configured to, determine channel information based on the pilot symbol, precode downlink data based on the channel information, and transmit the precoded downlink data to the mobile device. In these embodiments, a transition interval between receiving the uplink pilot symbol and beginning to transmit the precoded downlink data corresponds to less than five OFDM symbols at the symbol rate. This may facilitate reciprocity-based precoding for fast-moving mobile devices, in some embodiments.

Abstract translation: 公开了涉及大量MIMO通信系统的信令和帧结构的技术。 在一些实施例中，设备（102）被配置为通过第一信道（UL）从移动设备（106）接收上行链路导频符号，并且通过第一信道从移动设备接收上行链路数据，其中包括上行链路数据 在符号率的一个或多个正交频分复用（OFDM）符号中。 在这些实施例中，该装置被配置为基于导频符号确定基于信道信息的预编码下行链路数据的信道信息，并将预编码的下行链路数据发送到移动设备。 在这些实施例中，接收上行导频符号并开始发送预编码的下行链路数据之间的转换间隔对应于符号速率下的少于5个OFDM符号。 这在一些实施例中可以促进用于快速移动的移动设备的基于互易的预编码。

公开(公告)号：WO2015171956A1

公开(公告)日：2015-11-12

申请号：PCT/US2015/029786

申请日：2015-05-07

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： WONG, Ian C. ,  NIEMAN, Karl F. ,  KUNDARGI, Nikhil U. ,  PRUMO, Brooks C.

IPC: H04B7/04 ,  H04W56/00 ,  H04W88/08

CPC classification number: H04B7/0456 ,  H04B7/024 ,  H04B7/0413 ,  H04B7/0452 ,  H04L5/0048 ,  H04L7/0012 ,  H04L7/0025 ,  H04W56/00 ,  H04W88/08 ,  H04W88/085

Abstract: Techniques are disclosed relating to synchronization of radios in a large antenna count (LAC) system. In some embodiments, a LAC system includes a plurality of slave radios, a clock and trigger distribution system, and a master device. In these embodiments, the plurality of slave radios are configured to establish a fixed relationship between a reference clock and their respective local clocks. In these embodiments, the master device and plurality of slave radios are configured to generate and align respective common periodic time reference (CPTR) signals, at a lower frequency than the local clocks. In these embodiments, the master device is configured to transmit a trigger signal based on its CPTR and the plurality of slave radios are configured to perform an action based on the trigger at a subsequent edge of their CPTRs. This may allow synchronization of sampling for antennas in a massive MIMO base station, for example. In some embodiments the master device a radio and includes a local clock, is configured to establish and maintain a fixed relationship between a reference clock and its local clock, and is configured to perform an action based on the trigger at the subsequent edge of its CPTR.

Abstract translation: 公开了关于大天线计数（LAC）系统中的无线电的同步的技术。 在一些实施例中，LAC系统包括多个从无线电，时钟和触发分配系统以及主设备。 在这些实施例中，多个从无线电装置被配置成建立参考时钟与它们各自的本地时钟之间的固定关系。 在这些实施例中，主设备和多个从属无线电被配置为以比本地时钟低的频率产生和对准各自的公共周期时间基准（CPTR）信号。 在这些实施例中，主设备被配置为基于其CPTR发送触发信号，并且多个从无线电被配置为基于在其CPTR的后续边缘处的触发来执行动作。 这可以允许例如在大规模MIMO基站中的天线的采样同步。 在一些实施例中，主设备无线电并且包括本地时钟，被配置为建立和维持参考时钟与其本地时钟之间的固定关系，并且被配置为基于在其CPTR的后续边缘处的触发来执行动作 。

公开(公告)号：WO2017058717A1

公开(公告)日：2017-04-06

申请号：PCT/US2016/053721

申请日：2016-09-26

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： NIEMAN, Karl F.

IPC: H04B7/04 ,  H04B7/08

CPC classification number: H04B7/0413 ,  H04B7/0837 ,  H04L25/0202

Abstract: Techniques are disclosed relating to massive MIMO communications. In some embodiments, a base station is configured to dynamically adjust the number of processing elements used for MIMO signal estimation (e.g., the number of MIMO RX chains used for parallel processing). In some embodiments, the number of processing elements may be based on the number of antennas currently being used, the number of spatial streams, interconnect throughput thresholds, sampling rate, etc. In some embodiments, the base station includes configurable MIMO cores configured to dynamically switch between MIMO signal estimation techniques, e.g., on a per-symbol basis. In some embodiments, the base station includes configurable linear decoders configured to separately multiply input matrices and combine or refrain from combining the results based on the number of antennas and/or processing elements currently in use.

Abstract translation: 公开了涉及大量MIMO通信的技术。 在一些实施例中，基站被配置为动态地调整用于MIMO信号估计的处理元件的数量（例如，用于并行处理的MIMO RX链的数量）。 在一些实施例中，处理元件的数量可以基于当前使用的天线的数量，空间流的数量，互连吞吐量阈值，采样率等。在一些实施例中，基站包括被配置为动态地配置的MIMO核心 在MIMO信号估计技术之间切换，例如，以每符号为基础。 在一些实施例中，基站包括可配置的线性解码器，其被配置为单独地乘以输入矩阵，并且基于当前使用的天线数量和/或处理元素的组合或组合结果来组合或避免。

公开(公告)号：WO2015171824A1

公开(公告)日：2015-11-12

申请号：PCT/US2015/029550

申请日：2015-05-06

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： WONG, Ian C. ,  NIEMAN, Karl F. ,  KUNDARGI, Nikhil U.

IPC: H04B7/04

CPC classification number: H04B7/0456 ,  H04B7/024 ,  H04B7/0413 ,  H04B7/0452 ,  H04L5/0048 ,  H04L7/0012 ,  H04L7/0025 ,  H04W56/00 ,  H04W88/08 ,  H04W88/085

Abstract: Techniques are disclosed relating to a massive MIMO base station architecture. In some embodiments, a base station is configured to combine signals received by multiple antennas and, for at least a subset of processing elements included in the base station, each processing element is configured to operate on a different portion of the combined signals. In these embodiments, each portion includes signals from multiple antennas. In some embodiments, the portions are different time and/or frequency portions of the combined signals. In some embodiments, this distributed processing may allow the number of antennas of the base station to scale dramatically, provide dynamic re-configurability, facilitate real-time reciprocity-based precoding, etc.

Abstract translation: 公开了与大规模MIMO基站架构相关的技术。 在一些实施例中，基站被配置为组合由多个天线接收的信号，并且对于基站中包括的处理元件的至少一个子集，每个处理元件被配置为在组合信号的不同部分上操作。 在这些实施例中，每个部分包括来自多个天线的信号。 在一些实施例中，这些部分是组合信号的不同时间和/或频率部分。 在一些实施例中，这种分布式处理可以允许基站的天线数目显着地缩放，提供动态可重新配置性，促进基于实时互易的预编码等。