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US 7,116,698 B2Granted
Generator of repetitive sets of spread spectrum sequences
OwnerNorbert Daniele, Dominique Noguet +2inventors
InventorsNorbert Daniele, Dominique Noguet, Rosolino Lionti, Jean-René Lequepeys
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Abstract
A generator of repetitive sets of spreading sequences comprising element (20), for counting and for forming an address and a table (30) containing L sets of S sequences, wherein the address contains q=1+log2S bits, in which one set among L (L=2q) sets is selected and wherein the log2S bits select one sequence among the S sequences in the set.
Claims1
A generator of repetitive sets of spreading sequences for the transmission of symbols by spread spectrum, characterized in that it comprises:
- a) means of counting and forming an address (20) comprising:
- an input (22), receiving the symbols to be processed (Sij);
- a synchronization input (24), receiving pulses (Hs) synchronized with the symbols;
- means of counting the number of received symbols and forming an address (AB), the address comprising a first part (A) composed of a number q of bits, where q is the number of bits in each symbol, and a second part (B) composed of a number r of bits where r=log2S, and where S denotes the number of sequences in a set of sequences, the address (AB) thus comprising a number p of bits where p=q+log2S;
- an output (23) on which the address (AB) can be collected, for each input of each symbol (sij) applied to the means as counting and forming the address (20);
- b) a sequences table (30) comprising a number L of blocks (where L=2q), each block memorizing the set of S sequences, the sequence table being addressed by the address output by the counting and addressing means, the first part (A) of the address selecting one set among the L blocks and the second part (B) selecting one sequence among the S sequences in the one set.
3 more elements
Dependencies are inferred from the claim text.