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    • 4. 发明授权
    • Parallel DSP demodulation for wideband software-defined radios
    • 用于宽带软件定义无线电的并行DSP解调
    • US07697641B2
    • 2010-04-13
    • US10878902
    • 2004-06-28
    • Osama Sami HaddadinBrad Terry HansenDavid S. NelsonRoland Richard Henrie
    • Osama Sami HaddadinBrad Terry HansenDavid S. NelsonRoland Richard Henrie
    • H04L27/06
    • H04B1/0092H04B1/0003H04B1/28H04L7/0029H04L7/0332
    • A demodulator, suitable for use in a communication system and in a modem, has a block polyphase circuit with circuit blocks for different signal processing functions, particularly filtering, delay, and frequency conversion. The circuit blocks are arranged for parallel processing of different portions of an input sequence of signals. Signals of the input sequence to be filtered are divided among the blocks by a demultiplexer for processing at a clock frequency lower than a clock frequency of the input signal sequence. Signals outputted by groups of the circuit blocks are summed to produce an output signal of the group. Output signals of all of the groups are multiplexed to provide an output signal sequence such that the repetition frequency of the outputted signals may be higher, lower, or equal to that of the input signal sequence. This enables use of programmable circuitry operative at reduced clock rates.
    • 适用于通信系统和调制解调器的解调器具有块多相电路,具有用于不同信号处理功能的电路块,特别是滤波,延迟和频率转换。 电路块被布置用于对输入信号序列的不同部分进行并行处理。 要被滤波的输入序列的信号由解复用器在块之间划分,以在低于输入信号序列的时钟频率的时钟频率处理。 将由电路块的组输出的信号相加以产生该组的输出信号。 所有组的输出信号被复用以提供输出信号序列,使得输出信号的重复频率可以高于,低于或等于输入信号序列的重复频率。 这使得可以使用以降低的时钟速率工作的可编程电路。