info

Get characteristic information about 3-D MIMO fading channel

Syntax

channelInfo = info(lte3d)

Description

channelInfo = info(lte3d) returns characteristic information about the 3-D multi-input/multi-output (MIMO) fading channel object specified by lte3d.

Examples

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Get Characteristic Information About MIMO Fading Channel

Open Live Script

Create an lte3DChannel System object.

lte3d = lte3DChannel('PathDelays',[0 500e-9], ...
    'AveragePathGains',[-13.4 3.0], ...
    'AnglesAoD',[-178.1 -4.2], ...
    'AnglesAoA',[51.3 -152.7], ...
    'AnglesZoD',[50.2 93.2], ...
    'AnglesZoA',[125.4 91.3], ...
    'NumStrongestClusters',1);

To get characteristic information about the channel, call the info function on the object.

channelInfo = info(lte3d)

channelInfo = struct with fields:
    KFactorFirstCluster: -Inf
           ClusterTypes: {'SubclusteredNLOS'  'SubclusteredNLOS'  'SubclusteredNLOS'  'NLOS'}
             PathDelays: [5.0000e-07 5.0500e-07 5.1000e-07 0]
       AveragePathGains: [-0.0103 -2.2288 -3.9897 -13.4000]
              AnglesAoD: [-4.2000 -4.2000 -4.2000 -178.1000]
              AnglesAoA: [-152.7000 -152.7000 -152.7000 51.3000]
              AnglesZoD: [93.2000 93.2000 93.2000 50.2000]
              AnglesZoA: [91.3000 91.3000 91.3000 125.4000]
    NumTransmitAntennas: 8
        NumInputSignals: 8
     NumReceiveAntennas: 2
       NumOutputSignals: 2
     ChannelFilterDelay: 7
    MaximumChannelDelay: 23

Input Arguments

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`lte3d` — MIMO fading channel
`lte3DChannel` System object™

MIMO fading channel, specified as an lte3DChannel System object. This object implements the TR 36.873 link-level MIMO fading channel.

Output Arguments

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`channelInfo` — Characteristic information about MIMO fading channel
structure

Characteristic information about MIMO fading channel, returned as a structure containing the following fields:

Parameter Field	Value	Description
`PathDelays`	Numeric row vector	Delays of discrete channel paths for each cluster, returned in seconds. These values include the effects of `DelaySpread` scaling, and `KFactor` scaling (when enabled).
`ClusterTypes`	Cell array of character vectors	Type of each cluster in the delay profile, returned as a cell array of character vectors. Cluster types can be `'LOS'`,`'SubclusteredNLOS'`, or `'NLOS'`. The PathDelays, AveragePathGains, AnglesAoA, AnglesAoD, AnglesZoA, and AnglesZoD properties define the delay profile.
`AveragePathGains`	Numeric row vector	Average path gains of the discrete path or clusters in dB. These values include the effect of K-factor scaling if enabled. For more information, see the `KFactor` property.
`AnglesAoD`	Numeric row vector	Azimuth of departure angles of the clusters in degrees.
`AnglesAoA`	Numeric row vector	Azimuth of arrival angles of the clusters in degrees.
`AnglesZoD`	Numeric row vector	Zenith of departure angles of the clusters in degrees.
`AnglesZoA`	Numeric row vector	Zenith of arrival angles of the clusters in degrees.
`KFactorFirstCluster`	Numeric scalar	K-factor of first cluster of delay profile in dB. If the first cluster of the delay profile follows a Laplacian instead of a Rician distribution, `KFactorFirstCluster` is `-Inf`.
`NumTransmitAntennas`	Numeric scalar	Number of transmit antennas.
`NumInputSignals`	Numeric scalar	Number of input signals.
`NumReceiveAntennas`	Numeric scalar	Number of receive antennas.
`NumOutputSignals`	Numeric scalar	Number of output signals.
`ChannelFilterDelay`	Numeric scalar	Channel filter delay in samples.
Note The step of splitting the strongest clusters into subclusters, described in TR 36.873 [1], Section 7.3, requires sorting of the clusters by their average power. Therefore if the `NumStrongestClusters` property is nonzero, the fields of the information structure are sorted by average power. That is, the `AveragePathGains`, `ClusterTypes`, `PathDelays`, `AnglesAoD`, `AnglesAoA`, `AnglesZoD`, and `AnglesZoA` fields are presented in descending order of the average gain. If the `HasLOSCluster` property is set to `true`, the NLOS (Laplacian) part of that cluster, and the LOS cluster, are not necessarily next to each other. However, the `KFactorFirstCluster` field still indicates the appropriate K-factor scaling.

References

[1] 3GPP TR 36.873. “Study on 3D channel model for LTE.” 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA). URL: https://www.3gpp.org.