淘宝官方店推荐课程在线工具联系方式关于我们

	微波射频仿真设计 Ansoft Designer 中文培训教程 \| HFSS视频培训教程套装
	Agilent ADS 视频培训教程 \| CST微波工作室视频教程 \| AWR Microwave Office

首页 >> Ansoft Designer >> Ansoft Designer在线帮助文档

Ansoft Designer / Ansys Designer 在线帮助文档：

System Simulator >
System Component Models >
Equalizers >
Least Mean Square Equalizer, Complex (CLMSE)

Least Mean Square Equalizer, Complex (CLMSE)

Property	Description	Units	Default	Range/Type
NTAPS	The number of filter coefficients	None	4	(-Inf, Inf)/Integer
DELTA	The LMS algorithm step size	None	1	(-Inf, Inf)/Real
RIN1	Input1 impedance	Ohm	Inf	(0, Inf]/Real
RIN2	Input2 impedance	Ohm	Inf	(0, Inf]/Real
RIN3	Input3 impedance	Ohm	Inf	(0, Inf]/Real
RIN4	Input4 impedance	Ohm	Inf	(0, In]f
ROUT1	Output1 impedance	Ohm	0	[0, Inf)/Real
ROUT2	Output2 impedance	Ohm	0	[0, Inf)/Real
Ports
Input1	Real part of the complex input signal (real)
Input2	Imaginary part of the complex input signal (real)
Input3	Real part of the error signal (real)
Input4	Imaginary part of the error signal (real)
Output1	Real part of the complex output signal (real)
Output2	Imaginary part of the complex output signal (real)

Notes

1. This model updates the filter coefficients of the equalizer based on the input signal and the error signal (i.e., the difference between the output of the equalizer and the actual desired output). The update is based on minimizing the mean square error.

2. Let X(n) and h(n) denote the complex input signal vector and the vector of the complex filter coefficients respectively at time instant n. Each vector is assumed to be of length NTAPS (i.e., number of filter taps). The update of the filter coefficients is done according to

h(n+1) = h(n) + DELTA * e(n) * conj(X(n))

where: conj(X(n)) is the complex conjugate of the vector X(n) and e(n) = d(n) - y(n), where
d(n) is the desired output and y(n) is the equalizer output at time instant n.

3. The complex output of the equalizer at instant n + 1 is given by
y(n+1) = transpose(X(n+1)) * h(n+1)

4. The following initial conditions are always assumed:
h(-1) = 0, X(-1) = 0

Netlist Form

CLMSE:NAME n1 n2 n3 n4 n5 n6 NTAPS=val DELTA=val [RIN1=val] [RIN2=val] [RIN3=val] [RIN4=val] [ROUT1=val] [ROUT2=val]

Netlist Example

CLMSE:1 1 2 3 4 5 6 NTAPS=6 DELTA=.005

References

1. G. Proakis, Digital Communications, McGraw-Hill, 1989.

2. G. Proakis and D. G. Manolakis, Digital Signal Processing, Macmillan, 1988.

HFSS视频教程 ADS视频教程 CST视频教程 Ansoft Designer 中文教程


Copyright © 2006 - 2013 微波EDA网, All Rights Reserved 业务联系：mweda@163.com