| 摘要 |
RF repeater circuits may be used to regenerate an RF signal. A method and apparatus is described for regenerating a received RF signal the RF signal comprising a plurality of channels, each channel comprising a plurality of channel symbols, the method comprising producing a digitized RF signal from the received RF signal, extracting spectral information of each of the channels from the digitized RF signal, recovering one or more channel symbols from each of the plurality of channels, remodulating the channel symbols, and converting the remodulated channel symbols to an analog signal resulting in a regenerated RF signal. |
| 主权项 |
1. A radio-frequency (RF) repeater for regenerating a received RF signal, the RF signal comprising a plurality of channels, each channel comprising a plurality of channel symbols, the radio-frequency repeater comprising:
an input for receiving the received RF signal, an analog to digital convertor coupled to the input and configured to output a digitized RF signal, a spectrum processor coupled to the analog to digital convertor and configured to extract spectral information of each of the plurality of channels from the digitized RF signal, a channel symbol extraction module coupled to the spectrum processor and configured to extract one or more channel symbols from each of the plurality of channels, an RF signal regenerator coupled to the channel symbol extraction module and configured to remodulate the one or more extracted channel symbols in each of the plurality of channels and output a digitized regenerated RF signal, a digital to analog convertor coupled to the RF signal regenerator and configured to convert the digitized regenerated RF signal to a regenerated RF signal for transmission, wherein the spectrum processor comprises a Fourier transform module, wherein the spectrum processor is arranged to process the spectrum of a RF signal comprising a plurality of channels modulated using one of a Quadrature Amplitude Modulation (QAM) a Phase Shift Keying (PSK) modulation or Orthogonal Frequency Division Multiplexing scheme, and the spectrum is processed by adjusting the number of points Npts of the Fourier transform using a window function with a window bandwidth factor K in units of the number of Fourier transform output bins according to the relationship K*(Sample frequency/Npts)=Channel bandwidth, wherein N and K are positive integers. |
