FORMING SCRAMBLE SEQUENCES IN COMMUNICATIONS SYSTEM Russian patent published in 2012 - IPC H03K3/84 G06F7/58 

FIELD: communication systems; technologies of forming scramble and unscramble sequences.

SUBSTANCE: in one of the aspects various scramble sequences are formed on the basis of different circular shifts of the basic scramble sequence which is formed via a linear feedback shift register (LFSR), which can be a maximum length sequence. The scrambling sequence for this channel may be formed (i) by determining the value of the sequence switch based on the channel type and at least one parameter value for the channel and (ii) by a circular shift of the basic scramble sequence based on the sequence switch value. In another aspect the reference signal, which is sent through the system's variable passband, is formed by two scramble sequences which can be different circular shifts of the basic scramble sequence. Scrambling/unscrambling for positive and negative frequencies for the reference signal is implemented through the first and the second scramble sequences respectively.

EFFECT: more effective scrambling of all channels and signals.

29 cl, 10 dwg