1、 TECHNICAL REPORT ATIS-0600024 MULTIPLE-INPUT MULTIPLE-OUTPUT CROSSTALK CHANNEL MODEL ATIS is the leading technical planning and standards development organization committed to the rapid development of global, market-driven standards for the information, entertainment and communications industry. Mo
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5、e information, please visit . Notice of Disclaimer also referred to as the “Brown and Sharpe (B is forced to comply with the 99% worst-case model. Therefore = 6.6 . This leads to following table for the intra binder crosstalk: North America (ANSI) FEXT (with d in meters) 1.59410-10a -60 dB b 10 dB 1
6、1.0 6.6 5.1.2.2.3.3 Binder offset parameter As the distribution from the inter binder crosstalk seems to have a similar shape as the intra binder crosstalk, a single parameter (the binder offset parameter) can be used to determine the inter binder crosstalk, relative to the intra binder crosstalk. D
7、ue to the noise floor, which affects lower crosstalk values, the parameter was not determined based upon a fitting over the full data set. Instead, the 1% strongest crosstalk value of the measurement was used for the calculation of . This provides a good fit for the inter binder crosstalk measuremen
8、ts. 5.2 Relation to existing models in ATIS-0600417 and DSM TR Annex G There are three crosstalk models in documents that have been developed by the ATIS NIPP Committee (or its predecessor the T1E1 sub-committee): the single-line crosstalk model in ANSI ATIS-0600417.2003(R2007) Annex C, the MIMO cha
9、nnel model in the Dynamic Spectrum Management Technical Report (DSM TR) Annex G (ATIS-0600007), and the MIMO channel model in Clause 4 of this technical report. Each of these three crosstalk models has significant differences in both intended purpose and design. The crosstalk model published ANSI AT
10、IS-0600417.2003(R2007) Annex C: ATIS-0600024 18 Is a single-line deterministic analytical model. Model is based on measurements made on actual North American cables. Is a 99% worst-case model. This means that on average, 99% of the pairs tested have a FEXT coupling amplitude that is less than the va
11、lue given by the model at the given frequency. Phase information is not included in the ATIS-0600417 Annex C model. FEXT is always considered symmetric between any two pairs that originate and terminate at the same sites, are of the same length and of the same cable type. Inter-binder FEXT couplings
12、 were modeled between adjacent binders by adding a 10 dB loss at all frequencies. Non-adjacent binders were not modeled. The MIMO model in Annex G of the DSM TR: Primary purpose is to provide a detailed theoretical model of MIMO crosstalk in a cable/binder. Is a theoretical analytical model based on
13、 the ABCD theory of a multi-conductor transmission environment. The model is based on the two-port ABCD model described in an extension of the single-line ABCD model of ANSI ATIS-0600417 Annex C. The model includes parameters to model the randomness that may be observed in actual cable. In the DSM T
14、R Annex G MIMO model, the ABCD matrix of the multi-conductor transmission media must be obtained from the measured RLCG matrix parameters for a given cable. The FEXT couplings are then obtained from this frequency dependent matrix. This results in considerable computational complexity to utilize the
15、 model. The MIMO model in Clause 4 of this Technical Report: Models FEXT for the purpose of evaluating performance of FEXT cancellation systems. Model is based on measurements made on actual North American cables. The statistical variation of the FEXT couplings between pairs is taken into account by
16、 introducing an offset with a Beta distribution. The parameters of the Beta distribution have been chosen such that the amplitude of only 1% of the FEXT channels in a realization of the model exceeds the 99% worst-case value. Includes the distribution of the phase of the FEXT channel. Takes into acc
17、ount the issue of asymmetric FEXT couplings between pairs. The modeling of the FEXT couplings between pairs in different binders is addressed. Model is optimized for computational simplicity, especially when compared with the model in the DSM TR. It only requires that the parameters for the offsets and the phases be provided; yet it produces a model that matches well statistically with the actual measurements of the MIMO channel.
