info

Return characteristic information about channel filter

Syntax

infostruct = info(chanFilt)

Description

infostruct = info(chanFilt) returns a structure containing characteristic information about the comm.ChannelFilter System object™.

Examples

Determine Channel Filter Structure Dimensions

In a distributed MIMO system, send the same signal from two geographically separate transmitters (Tx) and combine the received signals at one single receiver (Rx) to explore spatial diversity. The two Txs are not co-located and they experience different multipath (path delays) to the Rx. Specify the path delays respectively.

delay1 = [0 1.5 2.3 5.2 6.6];
delay2 = [0 3.7 6.2];

Configure one channel filter object per Tx.

chanFilt1 = comm.ChannelFilter('PathDelays', delay1);
chanFilt2 = comm.ChannelFilter('PathDelays', delay2);

Use the info object function to get the ChannelFilterDelay and ChannelFilterCoefficients.

info(chanFilt1)

ans = struct with fields:
           ChannelFilterDelay: 6
    ChannelFilterCoefficients: [5x21 double]

info(chanFilt2)

ans = struct with fields:
           ChannelFilterDelay: 4
    ChannelFilterCoefficients: [3x19 double]

Input Arguments

chanFilt — Channel filter

System object

Channel filter, specified as a comm.ChannelFilter System object.

Output Arguments

infostruct — Characteristic information about channel filter

struct

Characteristic information about channel filter, returned as a structure containing these fields:

ChannelFilterDelay — Channel filter delay

positive real scalar

Channel filter delay, returned as a positive real scalar.

Data Types: double

ChannelFilterCoefficients — Channel filter coefficients

vector | matrix

Channel filter coefficients, returned as a vector or a matrix.

Data Types: double

Version History

Introduced in R2020b