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System Simulator >
System Component Models >
Channels >
Multipath Channel, Constant Gains and Integer Delays (MNCH)

Multipath Channel, Constant Gains and Integer Delays (MNCH)

Property	Description	Units	Default	Range/Type
L	Number of paths	None	3	[1, 12]/Integer
D1	Delay of first path (samples)	None	0	[0, Inf)/Integer
Gain1	Magnitude of the compex gain factor for first path	None	1	[0, Inf)/Real
Phase1	Phase of the complex gain factor for the first path	Degree	0	[-180, 180]/Real
D2 ~ D12	Multipath delays of all other paths (samples)	None	0	[0, Inf)/Integer
Gain2 ~ Gain12	Magnitude of the complex gain factor of all other paths, in dB	None	0	[0, Inf)/Real
Phase2 ~ Phase12	Phase of the complex gain factor of all other paths	Degree	0	[-180, 180)/Real
RIN	Input impedance	Ohm	Inf	(0, Inf]/Real
ROUT	Output impedance	Ohm	0	[0, Inf)/Real
Ports
Input	Input signal in complex envelope format (complex)
Output	Multipath nonfading signal in complex envelope format (complex)

Notes

1. This model can be used to simulate a Multipath Nonfading Channel with Integer Delays in samples.

2. Representing the RF channel as a time-variant channel and using a base-band complex envelope representation, the channel gain factor is specified by:

(1)
where L is the number of paths, Gain_iand Phase_i are magnitude and phase of the complex gain for the ith path, t_i >= 0 is the channel delay which can be expressed by D_isamples.

Netlist Form

MNCH:NAME n1 n2 L=val D1=val Gain1=val Phase1=val
[D2=val . . . Phase12=val] +[RIN=val] [ROUT=val]

Netlist Example

MRFCH:1 1 2 L=2 D1=0 Gain1=1.0 Phase1=0DEG D2=2 Gain1=0.2 Phase1=30DEG

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