Method for generating measuring signals for measuring transmission properties of transmission links mutually influencing one another with crosstalk in telecommunications systems, particularly of handsfree equipment
AssigneeSiemens Aktiengesellschaft
InventorsDieter Leckschat, Karl-Heinz Pflaum
Life of this patent
Estimating the term…
Abstract
In order to be able to measure the transmission properties of transmission links mutually influencing one another with crosstalk in electrical message systems, particularly of handsfree equipment (FSE) such that the measurement is not falsified by occurring crosstalk influences, measuring signals that are essentially orthogonal are generated in the time or frequency domain in the measuring system (MS) from respectively at least two voice or test signals.
Claims7
A method for generating measuring signals for measuring transmission properties of transmission links mutually influencing one another with crosstalk in a telecommunications system, comprising the steps of:
- generating a plurality k of source signals s;
- defining a (k−n+1)th source signal length xk−n+1 of a (k−n+1)th source signal sk−n+1 with xk−n+1 SIGNAL parts
- a1k−n+1, a2k−n+1, a3k−n+1 . . . axk−n+1−1, axk−n+1,
- said source signal length x being x 0, and said coefficient n being n{2 . . . k};
- defining a kth source signal length xk of a kth source signal sk with xk signal parts
- a1k, a2k, a3k . . . axk−1, axk;
- calculating a measuring signal length m as m=n′m′, said n being n′ 0 and said m′ being m′=2ent((ld(max{xk−n+1, xk}))+0,5;
- lengthening said (k−n+1)th source signal sk−n+1 to said measuring signal length m by attaching m−xk−n+1 zeros to an end of said (k−n+1)th source signal sk−n+1;
- lengthening said kth source signal sk to said measuring signal length m by attaching m−xk zeros to an end of said kth source signal sk;
- and
- modifying said lengthened (k−n+1)th source signal sk−n+1, and said lengthened kth source signal sk such that said (k−n+1)th source signal sk−n+1 and said kth source signal sk being essentially orthogonal.
A device for measuring transmission properties of transmission links mutually influencing one another with crosstalk in a telecommunications system, comprising:
- a measuring system for generating measuring signals, said measuring signals being generated by:
- generating a plurality k of source signals s;
- defining a (k−n+1)th source signal length xk−n+1 of a (k−n+1)th source signal sk−n+1 with xk−n+1 signal parts
- a1k−n+1, a2k−n+1, a3k−n+1 . . . axk−n+1−1 , axk−n+1,
- said source signal length x being x< >0, and said coefficient n being n{2 . . . k};
- defining a kth source signal length xk of a kth source signal sk with xk signal parts
- a1k, a2k, a3k . . . axk−1, axk;
- calculating a measuring signal length m as m=n′m′, said n being n′ 0 and said m′ being m′=2ent((ld(max{xk−n+1, x}))+0.5k
- lengthening said (k−n+1)th source signal sk−n+1 to said measuring signal length m by attaching m−xk−n+1 zeros to an end of said (k−n+1)th source signal sk−n+1;
- lengthening said kth source signal sk to said measuring signal length m by attaching m−xk zeros to an end of said kth source signal sk;
- and
- modifying said lengthened (k−n+1)th source signal sk−n+1 and said lengthened kth source signal sk such that said (k−n+1)th source signal sk−n+1 and said kth source signal sk being essentially orthogonal.
Dependencies are inferred from the claim text.