| 摘要 |
A method and apparatus is presented for simultaneous reception of a plurality of digital RF channels. Specifically, N amplifier-filter circuits (111, 112, 113) are configured to receive and separate a multichannel analog RF input signal into N analog signals, each including a different frequency band. N analog-to-digital converters (121, 122, 123) are provided, each respectively coupled to one of the N amplifier-filter circuits (111, 112, 113) and configured to receive an analog signal and generate a respective digital signal. A digital tuner (130) is coupled to receive and demultiplex the N digital signals generated by the N analog-to-digital converters (121, 122, 123), thereby recovering M digital RF channels. M demodulation circuits (141, 142, 143) are provided for performing demodulation and forward-error-correction of the M digital RF channels (see FIG. 1). This combination of components permits substantially simultaneous reception of multiple digital cable channels within a single digital receiver circuit suitable for use with conventional cable delivery systems and at a reasonable cost. |
