By Hubble E. P.

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Extra resources for [Article] Changes in the Form of the Nebula N. G. C. 2261

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This baseband equivalent channel has exactly the same form as with successive transmission with real baseband signals such as PAM, except that all quantities are complex. Thus, PAM is a special case. This representation allows a consistent single theory of equalization/modulation as will be followed by subsequent sections of this text and generally throughout the DSL industry. CAP systems can also be modeled by a complex equivalent system above except that the channel output is still passband and is the analytic signal where per real dimension.

Thus, PAM is a special case. This representation allows a consistent single theory of equalization/modulation as will be followed by subsequent sections of this text and generally throughout the DSL industry. CAP systems can also be modeled by a complex equivalent system above except that the channel output is still passband and is the analytic signal where per real dimension. and the noise is statistically again WGN with power spectral density σ2 In either the QAM or CAP case, a complex equivalent channel has been generated and the effects of carrier and/or center frequencies can be subsequently ignored in the analysis, which can then concentrate on detecting xb,k from the complex channel output.

AM ingress is investigated in Chapter 3 for ADSL. 4 Combining Different Crosstalk Signals and Noise Recently, the modeling of several types of different crosstalk signals in a single signal has been investigated by a group of phone companies known as the "full-service access network" group, and has been standardized in [10]. 6 before summing. 6. This can be expressed as: where Xtalk is either NEXT or FEXT, n is the total number of crosstalk disturbers, N is the number of types of unlike disturbers, and nj is the number of each type of disturber.

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