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    • 91. 发明授权
    • Systems and methods for wireless communication in sub gigahertz bands
    • 用于无线通信的子系统和方法
    • US08625690B2
    • 2014-01-07
    • US13410633
    • 2012-03-02
    • Mohammad Hossein Taghavi NasrabadiSameer VermaniLin YangHemanth Sampath
    • Mohammad Hossein Taghavi NasrabadiSameer VermaniLin YangHemanth Sampath
    • H04K1/10
    • H04L27/2647H04L5/0023H04L5/0053H04L27/2613H04L27/2628
    • Systems, methods, and devices for wireless communication. In one aspect, an apparatus for wireless communication is provided. The apparatus includes a receiver configured to receive a wireless signal comprising a packet. At least a portion of the wireless signal is configured to be received over a bandwidth lower than or equal to 1.25 MHz. The packet is formed from at least one orthogonal frequency-division multiplexing (OFDM) symbol comprising thirty-two tones. The thirty-two tones correspond to frequency subcarriers within the bandwidth. The thirty-two tones of the at least one OFDM symbol are allocated as: twenty-four data tones, two pilot tones, five guard tones, and one direct current (DC) tone. The apparatus includes a processor configured to evaluate the wireless signal. The processor includes a transform module configured to convert the at least one OFDM symbol into a frequency domain signal using a thirty-two point mode.
    • 用于无线通信的系统,方法和设备。 一方面,提供一种无线通信装置。 该装置包括被配置为接收包括分组的无线信号的接收机。 无线信号的至少一部分被配置为在低于或等于1.25MHz的带宽上接收。 分组由包括三十二个音调的至少一个正交频分复用(OFDM)符号形成。 32个音调对应于带宽内的频率子载波。 至少一个OFDM符号的三十二个音调被分配为:二十四个数据音调,两个导频音调,五个保护音调和一个直流(DC)音调。 该装置包括被配置为评估无线信号的处理器。 处理器包括变换模块,其被配置为使用三十二点模式将至少一个OFDM符号转换成频域信号。
    • 95. 发明授权
    • Emergency exit indicator incorporating LED unit
    • 紧急出口指示灯包含LED单元
    • US08297789B2
    • 2012-10-30
    • US12868681
    • 2010-08-25
    • Tay-Jian LiuLin YangFeng Tian
    • Tay-Jian LiuLin YangFeng Tian
    • F21S4/00
    • G09F13/04G09F13/18
    • An emergency exit indicator includes a flat housing and a light source received in the housing. The housing has a length greater than a width thereof. The housing includes a panel provided with a sign thereon to indicate emergency exit. The light source includes a plurality of LEDs each being covered by a lens. Light of the LED goes through the lens and is then illuminated on the sign to cause the sign to be visible. The lens has two opposite sides along a lengthwise direction of the housing longer than other two opposite sides along a widthwise direction of the housing, such that the light through the lens along the widthwise direction of the housing is converged in a narrower manner than the light through the lens along the lengthwise direction of the housing.
    • 紧急出口指示器包括容纳在壳体中的平坦壳体和光源。 外壳的长度大于其宽度。 壳体包括在其上设置有标志以指示紧急出口的面板。 光源包括多个LED,每个LED均被透镜覆盖。 LED的光线穿过镜头,然后在标牌上照亮,使得标志可见。 透镜沿着壳体的长度方向具有沿着壳体的宽度方向的其他两个相对侧的两个相对侧,使得沿着壳体的宽度方向穿过透镜的光以比光更窄的方式会聚 沿着壳体的长度方向穿过透镜。