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    • 9. 发明授权
    • Power spectrum shaping to reduce interference effects in devices sharing a communication medium
    • 功率谱整形,以减少共享通信介质的设备的干扰效应
    • US07154957B1
    • 2006-12-26
    • US10386094
    • 2003-03-10
    • Anton MonkEdward WarnerItzhak GurantzLadd ElwardaniRon Porat
    • Anton MonkEdward WarnerItzhak GurantzLadd ElwardaniRon Porat
    • H04L5/12H04L23/02
    • H04L27/2614H04L27/2608H04L27/2626H04L2025/03414
    • A broadband digital communication network transmits a signal with a shaped power spectrum to minimize interference with devices that share the communication medium. In one embodiment using coaxial wiring, devices such as cable converters and televisions that are not part of the network share the communication medium and are exposed to the network signal. Power levels across the network band are selected to reduce interference in the non-networked devices. One area of susceptibility is the tuner of cable channel receivers, which perform mixing and down conversion of RF signals. The power spectrum profile is selected to minimize the IF and base band interference after down conversion. The spectrum can be shaped within each 6 MHz band to further minimize the interference with a TV signal. The power levels can be optimized for both peak power limitation and quantization effects.
    • 宽带数字通信网络发送具有成形功率频谱的信号以最小化与共享通信介质的设备的干扰。 在使用同轴布线的一个实施例中,不是网络一部分的诸如电缆转换器和电视机的设备共享通信介质并暴露于网络信号。 选择跨网络的功率级别以减少非联网设备中的干扰。 一个敏感区域是有线信道接收机的调谐器,它们执行RF信号的混合和下变频。 选择功率谱分布,以最小化下变频后的中频和基带干扰。 频谱可以在每个6 MHz频带内成形,以进一步最小化对电视信号的干扰。 功率电平可以针对峰值功率限制和量化效应进行优化。