English to German Tech/Engineering Telecom(munications) interference cancellation

Kontext:

Throughout this document, the complex baseband notation is used. The baud-rate sampled outputs of linear transmission schemes without CCI can be described by the equivalent, discrete-time ISI channel model

[hier folgt eine math. Formel] (1)

where k is the time index. The channel coefficients h1(k) comprise the pulse shaping filter, the physical time-varying multipath fading channel, the receiving filter, and the sampling. The finite channel memory length L is assumed to be known at the receiver. The complex sequence a(k) represents the data and the complex values n(k) are additive white Gaussian-distributed noise samples of a random process with one-sided power spectral density N0. An extension to oversampled systems is straightforward ***by means of polyphase channels***.

Arbeitsbegriff derzeit: mittels mehrphasiger Kanäle

Ich habe in dt. Texten jedoch auch den Begriff "Phasenmehrdeutigkeit" in passenden Zusammenhängen gefunden. Was trifft hier nun zu?

Vielen Dank schon mal!