Table D-1: Basic Sequences Using Standard Scrambling - Alvarion BreezeACCESS 900 System Manual

Appendix D - Configuring Hopping Frequencies and Operational Sequences
Standard Scrambling
This mode is not recommended for sequences with 7 or more channels.
The scrambled basic sequences for 3 to 6 frequencies when using
Standard Scrambling are:

Table D-1: Basic Sequences using Standard Scrambling

N (number of channels)
3
4
5
6
Frequency 1 (index=1) is the lowest frequency in the list of frequencies
to be used, frequency 2 is the next frequency and so on.
Manual Scrambling
For customized definition of the hopping sequence, using the Manual
Sequence Definition option (see below).
Enhanced Scrambling
Automatically generates hopping sequences using an enhanced
algorithm. It is recommended that Enhanced Scrambling rather then
Standard Scrambling be used. If the Enhanced Scrambling Mode is
selected, the Spanning Factor parameter (see below) must be configured
in the AU. The Enhanced Mode is not suitable for sequences with 6 or
less frequencies. If Enhanced Scrambling is selected with sequences
that have 6 or less frequencies, than Standard Scrambling is used by
default.
The scrambled sequence is generated according to the following rules:
1. The first channel in the basic scrambled sequence is frequency 1
(Frequency 1 (index=1) is the lowest frequency in the list of
frequencies to be used, frequency 2 is the next frequency and so on.)
2. The index of each of the other channels is calculated by adding the
Spanning Factor to the index of the previous channel. Note that the
sequence is cyclic, meaning that adding 1 to the highest index in the
sequence (Index=N where N is the number of channels in the
sequence) will result in the first channel (Index=1).
D-4
Scrambled Basic Sequence (channel indexes)
1, 3, 2
1, 3, 2, 4
1, 3, 5, 2, 4
1, 3, 5, 2, 6, 4
BreezeACCESS 900 System Manual rev 1.1