Device for generating a digitally modulated test signal
First Claim
1. A method for generating a digitally modulated test signal comprising:
- generating a first group of transmission channels comprising I and Q values, in a modulation coder, directly from a modulation data stream according to a predetermined standard;
generating a second group of transmission channels comprising I and Q values by repeating a pre-calculated data sequence of limited length, said pre-calculated data sequence being recalled from a memory of a modulation coder;
adding said I and Q values of said first group and said second group; and
feeding the result to an I/Q modulator to generate said test signal.
1 Assignment
0 Petitions
Accused Products
Abstract
The aim of the invention is to generate a digitally modulated test signal, which is generated in the form of a multitude of transmission channels from a digital modulation data stream according to a predetermined digital modulation standard, and which is fed as I and Q values to an I/Q modulator. To this end: a) a portion of the transmission channels is generated, in a modulation coder, directly from an internal or external modulation data stream according to the predetermined modulation standard; b) the I and Q values for at least one portion of the remaining channels are fed as a pre-calculated modulation data sequence of alimited length from a memory to the modulation coder, and; the I and Q values generated according to a) and b) are added and fed to the I/Q modulator.
-
Citations
15 Claims
-
1. A method for generating a digitally modulated test signal comprising:
-
generating a first group of transmission channels comprising I and Q values, in a modulation coder, directly from a modulation data stream according to a predetermined standard; generating a second group of transmission channels comprising I and Q values by repeating a pre-calculated data sequence of limited length, said pre-calculated data sequence being recalled from a memory of a modulation coder; adding said I and Q values of said first group and said second group; and feeding the result to an I/Q modulator to generate said test signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
Specification