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    • 10. 发明授权
    • Multiple user digital receiver apparatus and method with time division
multiplexing
    • 具有时分复用的多用户数字接收装置和方法
    • US5870402A
    • 1999-02-09
    • US764808
    • 1996-12-12
    • Edwin A. Kelley
    • Edwin A. Kelley
    • G01S1/00H04B1/16H04B1/26H04B1/40H04H40/00H04J1/00
    • H04H40/00G01S19/13G01S19/35H04B1/0003H04B1/0007H04B1/001H04B1/0017H04B1/006H04B1/16H04B1/26H04B1/406G01S19/36
    • A digital receiver apparatus and method, designed for multiple simultaneous users, digitizes a received analog RF signal and tunes to multiple desired frequencies of the received signal on a time division multiplexed basis. After filtering by a finite impulse response (FIR) filter that also operates in time division multiplexing for multiple service bands, the selected signals are digitally demodulated and signal processed, again on a time-shared basis. Different service bands are accommodated at the same time by separate FIR filters, each including a coefficient memory for its particular service band. The multiplexed frequency signal for each band is multiplied by the coefficients of its respective FIR filter memory in a common complex multiplier. The results are demultiplexed and directed to respective accumulators for decimation in accordance with the FIR coefficient characteristics.
    • 为多个同时使用的用户设计的数字接收机装置和方法将接收到的模拟RF信号数字化,并以时分复用为基础调谐到接收信号的多个期望频率。 在通过也用于多个服务频带的时分多路复用的有限脉冲响应(FIR)滤波器进行滤波之后,再次基于时间共享对被选择的信号进行数字解调和信号处理。 通过单独的FIR滤波器同时容纳不同的服务频带,每个FIR滤波器包括用于其特定服务频带的系数存储器。 每个频带的多路复用频率信号在公共复数乘法器中乘以其各自的FIR滤波器存储器的系数。 根据FIR系数特性,将结果解复用并定向到相应的累加器进行抽取。