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    • 83. 发明申请
    • SYSTEM FOR IMPROVING MEMORY INTERFACE DATA INTEGRITY IN PLDS
    • 改进PLDS中记忆界面数据完整性的系统
    • US20060290542A1
    • 2006-12-28
    • US11458962
    • 2006-07-20
    • Hui Liu
    • Hui Liu
    • H03M7/34
    • G06F11/1032
    • An integrated circuit (IC) for optimizing data presentation to an external memory interface bus is provided. The IC is in communication with the external memory via the external memory interface bus. The IC includes an encoder that may encode the data that are being sent to an external memory. The encoder encodes the data based on the logic value of the majority of bits in the data. The encoder is capable of setting a status bit to indicate that the data are encoded. Further connected in series with the encoder is a parity generator that sets the parity bit logic value based on whether the number of logic 1s in the data, along with the status bit, is even or odd. The IC also includes a parity checker to detect whether any error occurred in the data during transmission. The decoder within the IC decodes the data to the original data.
    • 提供了一种用于优化到外部存储器接口总线的数据呈现的集成电路(IC)。 IC通过外部存储器接口总线与外部存储器通信。 该IC包括编码器,其可以对正在发送到外部存储器的数据进行编码。 编码器根据数据中大多数位的逻辑值对数据进行编码。 编码器能够设置状态位以指示数据被编码。 进一步与编码器串联的是奇偶校验发生器,其基于数据中的逻辑1的数量以及状态位是偶数还是奇数来设置奇偶校验位逻辑值。 IC还包括一个奇偶校验器,用于检测在传输过程中数据是否发生错误。 IC内的解码器将数据解码为原始数据。
    • 86. 发明授权
    • Smart antenna CDMA wireless communication system
    • 智能天线CDMA无线通信系统
    • US6122260A
    • 2000-09-19
    • US768100
    • 1996-12-16
    • Hui LiuGuanghan Xu
    • Hui LiuGuanghan Xu
    • H04B7/10H04B7/005H04B7/04H04B7/06H04B7/08H04B7/26H04J13/00
    • H04W52/42H04B7/0617H04B7/0632H04B7/086H04B7/0408Y02B60/50
    • A TDD antenna array S-CDMA system for increasing the capacity and quality of a wireless communications is disclosed. By simultaneous exploiting the spatial and code diversities, high performance communications between a plurality of remote terminals and a base station is achieved without sacrificing system flexibility and robustness. The time-division-duplex mode together with the inherent interference immunity of S-CDMA signals allow the spatial diversity to be exploited using simple and robust beamforming rather than demanding nulling. Measurements from an array of receiving antennas at the base station are utilized to estimate spatial signatures, timing offsets, transmission powers and other propagation parameters associated with a plurality of S-CDMA terminals. Such information is then used for system synchronization, downlink beamforming, as well as handoff management. In an examplary embodiment, the aforementioned processing is accomplished with minimum computations, thereby allowing the disclosed system to be applicable to a rapidly varying environment. Among many other inherent benefits of the present invention are large capacity and power efficiency, strong interference/fading resistance, robustness power control, and easy hand-off.
    • 公开了一种用于增加无线通信的容量和质量的TDD天线阵列S-CDMA系统。 通过同时利用空间和代码多样性,实现了多个远程终端与基站之间的高性能通信,而不牺牲系统灵活性和鲁棒性。 时分双工模式以及S-CDMA信号的固有抗干扰能力允许使用简单且鲁棒的波束成形来利用空间分集,而不是要求零点。 来自基站的接收天线阵列的测量被用于估计与多个S-CDMA终端相关联的空间签名,定时偏移,发射功率和其它传播参数。 然后将这样的信息用于系统同步,下行链路波束成形以及切换管理。 在示例性实施例中,通过最小计算来实现上述处理,从而允许所公开的系统适用于快速变化的环境。 本发明的许多其它固有的优点是具有大容量和功率效率,强的抗干扰/抗褪色性,鲁棒性功率控制和便于切换。