info
Description
returns a structure containing characteristic information about the infostruct
= info(chanFilt
)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:
ChannelFilterCoefficients: [5x21 double]
ChannelFilterDelay: 6
info(chanFilt2)
ans = struct with fields:
ChannelFilterCoefficients: [3x19 double]
ChannelFilterDelay: 4
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
— Excess filter delay
positive integer
Excess filter delay in samples, returned as a positive integer.
If you configure the
PathDelays
property of your channel object with all integer-valued delays, the implemented channel filter adds no excess delay to the channel output. In this case, theChannelFilterDelay
field reports0
for the excess path delay.If you configure the
PathDelays
property of your channel object with any noninteger-valued delays, the implemented channel filter may add excess delay to the channel output. In this case, theChannelFilterDelay
field may report a nonzero value for the excess path delay.
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
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