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US 2007/0258593 A1Published application
System for generating pseudorandom sequences
AssigneeInterDigital Technology Corporation
InventorEdward Hepler
Life of this patent
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Abstract
A system for generating pseudorandom codes using a register which contains an identification of the code tree leg of the desired code and a counter which outputs a successive binary sequence. The output from the counter is bit-by-bit ANDed with the output of the register, and those outputs are XORed together to output a single bit. As the counter is sequenced, each count results in a different bit that is output from the XOR gate, resulting in the desired code.
Claims13
A method for generating a pseudorandom code, the method comprising the steps of:
- (a) generating a series of 2M M-bit wide binary codes starting from the lowest bit to the highest bit;
- (b) selecting am M-bit wide binary index code corresponding to the index number of the pseudorandom code among a set of pseudorandom codes;
- and,
- (c) performing a logical operation between each of the 2M codes generated in step (a) and an index code selected in step (b) in order to generate a 2M-bit wide pseudorandom code.
1 more element
A pseudorandom code generator comprising:
- a code generator for generating a series of 2M M-bit wide binary codes starting from the lowest bit to the highest bit;
- an index code selector for selecting an M-bit wide binary index code corresponding to the index number of the pseudorandom code among a set of pseudorandom codes;
- and,
- a logical operator for performing a logical operation between each code generated by the code generator and the index code selected by the index code selector in order to generate a 2M-bit wide pseudorandom code.
1 more element
Dependencies are inferred from the claim text.