Fading channel simulator

Patent · Tue Mar 02 00:00:00 EST 1993

OSTI ID:6253745

Argo, P E; Fitzgerald, T J

Fading channel effects on a transmitted communication signal are simulated with both frequency and time variations using a channel scattering function to affect the transmitted signal. A conventional channel scattering function is converted to a series of channel realizations by multiplying the square root of the channel scattering function by a complex number of which the real and imaginary parts are each independent variables. The two-dimensional inverse-FFT of this complex-valued channel realization yields a matrix of channel coefficients that provide a complete frequency-time description of the channel. The transmitted radio signal is segmented to provide a series of transmitted signal and each segment is subject to FFT to generate a series of signal coefficient matrices. The channel coefficient matrices and signal coefficient matrices are then multiplied and subjected to inverse-FFT to output a signal representing the received affected radio signal. A variety of channel scattering functions can be used to characterize the response of a transmitter-receiver system to such atmospheric effects.

• Assignee: Dept. of Energy, Washington, DC (United States)
• Patent Number(s): US 5191594; A
• Application Number: PPN: US 7-798780
• OSTI ID: 6253745
• Resource Relation: Patent File Date: 27 Nov 1991
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
RADIO EQUIPMENT
SIMULATORS
DATA TRANSMISSION
EARTH ATMOSPHERE
FOURIER TRANSFORMATION
MATRICES
RESPONSE FUNCTIONS
SIGNALS
ANALOG SYSTEMS
COMMUNICATIONS
ELECTRONIC EQUIPMENT
EQUIPMENT
FUNCTIONAL MODELS
FUNCTIONS
INTEGRAL TRANSFORMATIONS
TRANSFORMATIONS
426000* - Engineering- Components
Electron Devices & Circuits- (1990-)