Linear Recursive Sequences Flashcards
1
Q
What is a linear recursive sequence ?
A
A repeating sequence of predictable numbers which will continually repeat themselves if left to run.
2
Q
How does LRS work ?
A
linear recursive sequences uses pseudo random numbers
3
Q
5 uses of LRS?
A
SELCAL Encryption Code division multiple access Frequency hopping Randomisation Direct sequence spread spectrum Bit error rate testing Echo cancellation Cypher starts For award error correction
4
Q
What is included in an Shift register generator?
A
Shift register
Clock
XOR logic gate
Bistable cells
5
Q
What is the initial start condition known as?
A
The fill
6
Q
The arrangements and tap points can be defined by what ?
A
Numeric, standard form and polynomial
7
Q
What influences the length of an LRS?
A
the number of bi stable cells and number and location of tapping points.
8
Q
What is the formula for calculating the maximal sequence length of an LRS?
A
2n-1( where n equals the number of cells in the shift register.
