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    • 1. 发明授权
    • Precoder codebooks for effective channels with structured frequency-selectivity
    • 具有结构化频率选择性的有效通道的预编码器码本
    • US08391395B2
    • 2013-03-05
    • US12960964
    • 2010-12-06
    • David HammarwallGeorge Jöngren
    • David HammarwallGeorge Jöngren
    • H04B7/02
    • H04B7/0626H04B7/0417H04B7/065
    • A precoder for an effective channel linking a wireless receiver to a wireless transmitter includes a precoder report and a precoder update report, the effective channel including a propagation channel, transmit filters and receive filters. A structured frequency-selectivity of the effective channel is determined, the structured frequency-selectivity being induced by one or more long term and/or persistent parameters of the effective channel. The precoder update report is generated based on the structured frequency-selectivity. The precoder update report includes frequency-dependent phase compensation which accounts for the structured frequency-selectivity. The precoder report is generated for the effective channel based on channel state information determined for the effective channel. The precoder report and the precoder update report are transmitted to the wireless transmitter. The transmitter determines a transmission operation based on the precoder report and the precoder update report, and transmits data to the wireless receiver in accordance with the transmission operation.
    • 将无线接收机与无线发射机连接的有效信道的预编码器包括预编码器报告和预编码器更新报告,有效信道包括传播信道,发射滤波器和接收滤波器。 确定有效信道的结构化频率选择性,结构化频率选择性由有效信道的一个或多个长期和/或持久参数引起。 基于结构化频率选择性生成预编码器更新报告。 预编码器更新报告包括考虑结构化频率选择性的频率相位相位补偿。 基于为有效信道确定的信道状态信息,为有效信道生成预编码器报告。 预编码器报告和预编码器更新报告被发送到无线发射机。 发射机根据预编码器报告和预编码器更新报告确定传输操作,并根据传输操作向无线接收机发送数据。
    • 3. 发明申请
    • Re-Configurable Passive Mixer for Wireless Receivers
    • 无线接收机的可重构无源混频器
    • US20100081408A1
    • 2010-04-01
    • US12243232
    • 2008-10-01
    • Fenghao MuFredrik Tillman
    • Fenghao MuFredrik Tillman
    • H04B1/26
    • H03D7/1441H03D7/1458H03D7/1466H03D7/165H03D2200/0023H03D2200/0043H03D2200/0084H03D2200/0088
    • A configurable passive mixer is described herein. According to one exemplary embodiment, the passive mixer comprises a clock generator, a controller, and a plurality of passive mixer cores connected in parallel. The clock generator comprises a local oscillator drive unit for each passive mixer core. The controller varies an effective transistor size of the passive mixer by separately configuring each of the passive mixer cores to enable/disable each passive mixer core. For example, the controller may selectively enable one or more of the passive mixer cores to vary the effective transistor width of the passive mixer. As the performance requirements and/or the operating communication standard change, the controller may re-configure each passive mixer core.
    • 这里描述了可配置的无源混频器。 根据一个示例性实施例,无源混频器包括时钟发生器,控制器和并联连接的多个无源混频器核心。 时钟发生器包括用于每个无源混频器核心的本地振荡器驱动单元。 控制器通过分别配置每个无源混频器内核来实现/禁用每个无源混频器内核,从而改变无源混频器的有效晶体管尺寸。 例如,控制器可以选择性地使一个或多个无源混频器内核改变无源混频器的有效晶体管宽度。 随着性能要求和/或操作通信标准的改变,控制器可以重新配置每个无源混频器核心。