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    • 2. 发明申请
    • LOW LATENCY CHANNEL ESTIMATION FOR DOWNLINK MIMO
    • 用于下行链路MIMO的低信道信道估计
    • WO2011156940A1
    • 2011-12-22
    • PCT/CN2010/001054
    • 2010-07-14
    • TELEFONAKTIEBOLAGET L M ERICSSON (publ)HU, YangJONSSON, Elias
    • HU, YangJONSSON, Elias
    • H04W80/00
    • H04W24/02H04J13/0003H04J13/004H04J13/0048H04J13/18H04L5/0016H04L5/0051H04L25/022H04L25/0224H04L25/0232H04L27/2613H04L27/262H04W48/08H04W72/042
    • When more than two layers are multiplexed in one CDM group, length-4 OCC has to be used across both clusters in one subframe. This means that slot-by-slot channel estimation according to conventional schemes cannot be exploited and Doppler impact cannot be well overcome. By introducing virtual variables and virtual channel samples that are used in processing two time slots in a subframe independently and applying a frequency domain filter based on the virtual variables and then performing postprocessing based on virtual channel samples, slot-by-slot processing is possible to reduce latency and overcome Doppler impact. Code de- spreading of length-4 OCC is no longer processed in time domain, but in frequency domain with two adjacent CDM subgroups. As a result, the frequency domain filtering can start earlier whereby detection latency and processing time for OCC of length longer than 2 is reduced. It can also be used for the length-2 OCC.
    • 当一个CDM组中多于两层复用时,必须在一个子帧中跨两个簇使用长度为4的OCC。 这意味着根据常规方案的逐时隙信道估计不能被利用,并且多普勒影响不能很好地克服。 通过引入用于独立处理子帧中的两个时隙的虚拟变量和虚拟信道样本,并且基于虚拟变量应用频域过滤器,然后基于虚拟信道样本执行后处理,逐个时隙处理是可能的 减少延迟并克服多普勒影响。 长度为4的OCC的码扩展不再在时域中进行处理,而在频域中具有两个相邻的CDM子组。 结果,可以更早地开始频域滤波,从而降低长度大于2的OCC的检测等待时间和处理时间。 它也可以用于长度为2的OCC。
    • 7. 发明申请
    • SYSTEM AND METHOD OF MODULATION AND CODING SCHEME ADJUSTMENT FOR A LTE SHARED DATA CHANNEL
    • 用于LTE共享数据信道的调制和编码方案调整的系统和方法
    • WO2010018442A2
    • 2010-02-18
    • PCT/IB2009/006512
    • 2009-08-11
    • TELEFONAKTIEBOLAGET L M ERICSSON (publ)CHENG, jung-FuHU, Yang
    • CHENG, jung-FuHU, Yang
    • H04L5/00
    • H04L1/0005H04L1/0003H04L1/0011H04L1/0026H04L5/0007H04L5/0044H04L5/0058
    • A system, method and node for modulation and coding scheme adjustment for a Long Term Evolution (LTE) shared Data Channel. The method determines an actual number of orthogonal frequency division multiplexing (OFDM) symbols, N OS utilized for the shared Data Channel. A modulation order for transmission of data on the shared Data Channel is increased when the actual number of OFDM symbols Nos is less than 11 and decreased when N OS is more than 11. A modulation and coding scheme field ( I MCS ) of a downlink control information of the shared Data Channel may also be determined. If o ≤ I MCS +11- N OS ≤ 28, the modulation order is modified by utilizing a factor of (I MCS + 11 - N OS ) in a standardized modulation scheme. If it is determined that I MCS + 11 - N OS MCS + 11 - N OS > 28, the modulation order is set to 64 Quadtrative Amplitude Modulation (64QAM).
    • 用于长期演进(LTE)共享数据信道的调制和编码方案调整的系统,方法和节点。 该方法确定用于共享数据信道的正交频分复用(OFDM)符号的实际数量N OS。 当实际的OFDM符号数目N s小于11时,用于共享数据信道上的数据传输的调制阶数增加,并且当N OS大于11时,调制阶数降低。调制和编码方案字段( 还可以确定共享数据信道的下行链路控制信息的数目。 如果满足下列条件,则调制阶数通过利用因子(I MCS + 11 - N OS)在标准化调制方案中。 如果确定I MCS + 11-N o,调制阶数设置为正交相移键控(QPSK)。 如果确定I MCS + 11-N OS > 28,调制阶数被设置为64 Quadrature Amplitude Modulation(64QAM)。
    • 10. 发明申请
    • METHOD AND APPARATUS FOR LED DRIVING AND DIMMING, AND ILLUMINATION SYSTEM
    • LED驱动和调光及照明系统的方法与装置
    • WO2012028554A1
    • 2012-03-08
    • PCT/EP2011/064744
    • 2011-08-26
    • OSRAM AGHU, YangWU, Li Bo
    • HU, YangWU, Li Bo
    • H05B33/08
    • H05B37/02H05B33/0818H05B33/0851
    • The present invention relates to method and apparatus for driving an LED, and method and apparatus tor dimming an LED, an illumination system including an apparatus for driving an LED, and an illumination, system including an apparatus for dimming an LED. The method for driving an LED includes determining duty cycle of pulse sequence for controlling the power switch according to present current and predetermined operating current of the LED; generating the pulse sequence according to the duty cycle and according to randomized period sequence and/or randomized pulse position sequence; and controlling switching operation of the power switch by the pulse sequence, so as to drive the LED. Wherein, the LED is connected to power switch. By applying the present; invention, electromagnetic interference may be decreased, and the flickering of the LED may be reduced.
    • 本发明涉及用于驱动LED的方法和装置,以及对LED调光的方法和装置,包括用于驱动LED的装置的照明系统,以及包括用于使LED变暗的装置的照明系统。 用于驱动LED的方法包括根据当前的LED和预定的工作电流确定用于控制电源开关的脉冲序列的占空比; 根据占空比根据随机期间序列和/或随机脉冲位置序列产生脉冲序列; 并通过脉冲序列控制电源开关的开关动作,驱动LED。 其中LED连接电源开关。 通过应用现在; 发明中,电磁干扰可能降低,LED的闪烁可能降低。