Upstream frequency response measurement and characterization

摘要

Upstream frequency response measurement and characterization. Signaling is provided between respective communication devices within a communication system. Based upon at least one of these signals, one of the communication devices captures a number of sample sets corresponding thereto at different respective frequencies (e.g., a different respective center frequencies, frequency bands, etc.). Then, spectral analysis is performed with respect to each of the sample sets to generate a respective and corresponding channel response estimate there from. After this number of channel response estimates is determined, they are combined or splice together to generate a full channel response estimate. In implementations including an equalizer, different respective sample sets may correspond to those that have undergone equalization processing and those that have not.

主权项

1. An apparatus comprising:
a communication interface; and a processor configured to:
receive, via the communication interface, a ranging burst transmitted via a channel from another apparatus;capture a plurality of sample sets corresponding to the ranging burst, wherein each sample set of the plurality of sample sets corresponds to a respective center frequency of a plurality of center frequencies of a plurality of sub-channels distributed across the channel;perform fast Fourier transform (FFT) processing of each sample set of the plurality of sample sets to generate a plurality of channel response estimates, wherein each channel response estimate of the plurality of channel response estimates corresponds to a respective channel response estimate of a respective sub-channel of the plurality of sub-channels; andsplice the plurality of channel response estimates together to generate a full channel response estimate of the channel.