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    • 27. 发明授权
    • Calibration-less transmit beamforming
    • 无校准发射波束成形
    • US08548379B2
    • 2013-10-01
    • US12543566
    • 2009-08-19
    • Hang JinJohn Grabner
    • Hang JinJohn Grabner
    • H04B5/00
    • H04W52/42
    • A calibration-less transmit beamforming apparatus and method are provided. In a wireless communication device that comprises a plurality of antennas, a gain block is provided in the front-end module associated with each antenna and the same gain block is used during transmit and receive operations. As a result, the transmit phase offset and receive phase offset for each antenna are made to be equal, thereby achieving conditions for transmit beamforming without the need for complex antenna calibration algorithms and hardware.
    • 提供了一种无校准的发射波束形成装置和方法。 在包括多个天线的无线通信设备中,在与每个天线相关联的前端模块中提供增益块,并且在发射和接收操作期间使用相同的增益块。 结果,使每个天线的发射相位偏移和接收相位偏移相等,从而实现发射波束成形的条件,而不需要复杂的天线校准算法和硬件。
    • 28. 发明授权
    • Offset direct conversion receiver
    • 偏移直接转换接收器
    • US08249538B2
    • 2012-08-21
    • US12276449
    • 2008-11-24
    • Hang JinJohn Grabner
    • Hang JinJohn Grabner
    • H04B1/10
    • H04B1/30
    • An offset direct conversion receiver apparatus and corresponding receiving method are provided. A received wireless signal is directly downconverted and demodulated to a baseband offset frequency that is offset from zero frequency to produce an in-phase (I) baseband offset signal centered at the baseband offset frequency and a quadrature-phase (Q) baseband offset signal centered at the baseband offset frequency. The I baseband offset signal and Q baseband offset signal are bandpass filtered to produce an I bandpass signal and a Q bandpass signal, respectively. The I bandpass signal and the Q bandpass signal are downconverted from the baseband offset frequency to zero frequency to produce an I baseband receive signal and a Q baseband receive signal. A technique and logic are also provided to select the best baseband offset frequency used in an offset direct conversion receiver.
    • 提供一种偏移直接变换接收装置及相应的接收方法。 接收到的无线信号被直接下变频并被解调为从零频率偏移的基带偏移频率,以产生以基带偏移频率为中心的同相(I)基带偏移信号,并以正交相位(Q)基带偏移信号为中心 在基带偏移频率。 I基带偏移信号和Q基带偏移信号被带通滤波,分别产生I带通信号和Q带通信号。 I带通信号和Q带通信号从基带偏移频率下变频到零频率,以产生I基带接收信号和Q基带接收信号。 还提供了一种技术和逻辑来选择在偏移直接转换接收机中使用的最佳基带偏移频率。
    • 29. 发明授权
    • Hybrid time-spatial multiplexing for wireless broadcast messages through antenna radiation beam synthesis
    • 通过天线辐射束合成的无线广播消息的混合时空复用
    • US08195240B2
    • 2012-06-05
    • US12103406
    • 2008-04-15
    • Hang JinJohn GrabnerLi GuoQingwen Liu
    • Hang JinJohn GrabnerLi GuoQingwen Liu
    • H04W40/00H04J3/00
    • H04W16/28H04W48/12H04W72/048
    • A hybrid time-spatial multiplexing technique is provided for beamforming broadcast messages to mobile stations that may be within a coverage region or cell of a base station. The coverage region is divided into a plurality of segments. The mobile stations are assigned to at least one of the segments based on their locations within the coverage region or other criteria. The base station computes beamforming antenna weights which are configured to produce a radiation beam pattern from a plurality of antennas of the base station to respective ones of each of the plurality of segments in the region. A broadcast message is transmitted to each segment of the region in a time-division multiplexed manner using the beamforming antenna weights associated with the radiation beam pattern for the corresponding segment.
    • 提供混合时空复用技术用于向可能在基站的覆盖区域或小区内的移动台发送波束成形广播消息。 覆盖区域被分成多个段。 基于其在覆盖区域内的位置或其他标准,移动站被分配给至少一个段。 基站计算波束成形天线权重,其被配置为从该基站的多个天线到该区域中的多个段中的每一个的相应的一个的相应的一个波段图形。 使用与用于相应段的辐射束图案相关联的波束成形天线权重,以时分复用方式将广播消息发送到该区域的每个段。
    • 30. 发明授权
    • Method and system for transmitter beamforming
    • 发射机波束成形的方法和系统
    • US08116818B2
    • 2012-02-14
    • US11397214
    • 2006-04-04
    • Hang JinJohn Grabner
    • Hang JinJohn Grabner
    • H04M1/00
    • H04B7/0617H04B7/0626H04B17/373
    • A system and method are provided for improving the performance of a beamforming antenna array in a wireless communications system. A predetermined number of spatial signatures are observed for a communications channel between a base station and a mobile terminal during a predetermined time period. One or more test spatial signatures are generated based on statistical analysis of the observed predetermined number of spatial signatures. A beamforming weight is derived based on the generated test spatial signatures for beamforming by an antenna subsystem of the base station.
    • 提供了一种用于改善无线通信系统中波束成形天线阵列的性能的系统和方法。 在预定时间段期间,在基站和移动终端之间的通信信道上观察到预定数量的空间签名。 基于观察到的预定数量的空间签名的统计分析来生成一个或多个测试空间签名。 基于由基站的天线子系统产生的用于波束成形的所产生的测试空间特征导出波束成形权重。