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    • 74. 发明授权
    • Per stream rate control (PSRC) for improving system efficiency in OFDM-MIMO communication systems
    • 每个流速控制(PSRC),用于提高OFDM-MIMO通信系统中的系统效率
    • US07499393B2
    • 2009-03-03
    • US11189649
    • 2005-07-26
    • Fatih Ozluturk
    • Fatih Ozluturk
    • H04J11/00
    • H04L5/006H04B7/02H04B7/0697H04L1/0003H04L1/0009H04L1/0026H04L5/0023H04L5/0046H04L27/2608
    • A transmitter splits a user-data stream into a plurality of sub-streams. The transmitter then adaptively selects a modulation scheme and coding rate for each of the sub-streams based on current channel conditions. Next, a plurality of sub-carriers are modulated and encoded with the sub-stream data according to the selected modulation schemes and coding rates. The modulated sub-carriers are each allocated to one or more transmit antennas for transmission. Prior to transmission, a transmission power for each of the sub-carriers is adjusted based on the channel conditions. The adaptive modulation and coding function, the sub-carrier allocation function, and the power control function are jointly controlled to optimize throughput, signal quality, and system efficiency.
    • 发送器将用户数据流分解成多个子流。 然后,发射机基于当前信道条件自适应地选择每个子流的调制方案和编码率。 接下来,根据所选择的调制方案和编码率,利用子流数据对多个子载波进行调制和编码。 调制后的子载波被分配给一个或多个发射天线用于发射。 在发送之前,基于信道条件来调整每个子载波的发送功率。 共同控制自适应调制编码功能,子载波分配功能和功率控制功能,优化吞吐量,信号质量和系统效率。
    • 79. 发明申请
    • Wireless communication method and system for forming three-dimensional control channel beams and managing high volume user coverage areas
    • 用于形成三维控制信道波束和管理大容量用户覆盖区域的无线通信方法和系统
    • US20050272472A1
    • 2005-12-08
    • US11019422
    • 2004-12-22
    • Steven GoldbergFatih OzluturkJung-Lin PanYingming Tsai
    • Steven GoldbergFatih OzluturkJung-Lin PanYingming Tsai
    • H04W16/24H04W16/28H04Q7/20
    • H04W16/28H04W16/24
    • A wireless communication system and method generates and shapes one or more three-dimensional control channel beams for transmitting and receiving signals. Each three-dimensional beam is directed to cover a particular coverage area and beam forming is utilized to adjust bore sight and beam width of the three-dimensional beam in both azimuth and elevation, and the three-dimensional control channel beam is identified. In another embodiment, changes in hot-zones or hot-spots, (i.e., designated high volume user coverage areas), are managed by a network cell base station having at least one antenna. Each of a plurality of wireless transmit/receive units (WTRUs) served by the base station use a formed beam based on one or more beam characteristics. When the coverage area is changed, the base station instructs at least one of the WTRUs to change its beam characteristics such that it forms a return beam concentrated on the antenna of the base station.
    • 无线通信系统和方法产生并形成用于发送和接收信号的一个或多个三维控制信道波束。 每个三维光束被引导以覆盖特定的覆盖区域,并且利用光束成形来调节三维光束在方位角和仰角中的视野和光束宽度,并且识别三维控制信道光束。 在另一个实施例中,热区或热点(即,指定的大容量用户覆盖区域)的变化由具有至少一个天线的网络小区基站管理。 由基站服务的多个无线发射/接收单元(WTRU)中的每一个基于一个或多个波束特性使用形成的波束。 当覆盖区域改变时,基站指示至少一个WTRU改变其波束特性,使得它形成集中在基站的天线上的返回波束。