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7580157 High-pass dither generator and method  
A method and circuit for generating an M-bit digital dither signal with a substantially uniform probability density function and high-pass spectrum are disclosed. The circuit includes a linear...
7576620 Pseudo random clock generator  
A pseudo random clock generator includes a clock generator for generating a clock signal. A pseudo random code generator receives the clock signal and thereby generating a pseudo random code. A...
7512645 System and method for generating pseudorandom numbers  
A system that has a pseudorandom number generator and a mapping system. The pseudorandom number generator generates a random number that is mapped by the mapping system to an output value that is...
7479837 Noise signal generation by mapping random words  
A noise signal generator includes a random word generator for generating a sequence of random words, each word representing an input value, a mapping unit for receiving the sequence of random...
7480687 Pseudorandom number generator for a stream cipher  
A pseudorandom number generator includes a unit for providing a number of 2n sequences of numbers, n being greater than or equal to 2. The sequences of numbers are combined by a unit such that at...
7433906 Method of updating a shift register  
There is disclosed a method of updating a pseudo noise code shift retiser in a noise code shift register in a software implemented CDMA system from a current value, including representing a tap...
7426528 Method and device for calculating an iterated state for a feedback shift register arrangement  
A final state in a shift register arrangement is obtained from an initial state by means of N-fold iteration using an iteration rule prescribed by a characteristic polynomial f(x) of n-th order. To...
7412057 Fast-software-implemented pseudo-random code generator  
Embodiments of the present invention provide a fast, software-implemented data scrambling system for data communications. For pseudo-random codes that are periodic within a predetermined number of...
7398287 Fast linear feedback shift register engine  
A method of generating a pseudo-noise sequence without masking a linear feedback shift register (LFSR) generator is provided. An offset pseudo-noise sequence is generated at a desired offset from a...
7389316 Method and apparatus for true random number generation  
Method and apparatus for true random number generation is described. One aspect of the invention relates to a digital logic circuit that includes N logic gates, where N is an integer greater than...
7383295 Selective sequence generation method and apparatus  
A sequence generator is configured to be re-initialized to a value selected derived from a candidate group that is derived from a predetermined value. If and when the re-initializing is performed,...
7356551 Method and apparatus of retaining maximum speed of flip-flop metastability based random number generators  
An apparatus, system and method for retaining the maximum speed of flip-flop metastability based random number generators includes a fixed delay unit having an input for receiving a common signal...
7346834 Randomizer systems for producing multiple-symbol randomizing sequences  
A system that produces one or more non-repeating randomizer sequences of up to 2 m −1 or more m-bit symbols includes a randomizer circuit that is set up in accordance with a polynomial with...
7340496 System and method for determining the Nth state of linear feedback shift registers  
The Nth state of an n-stage linear feedback shift register (LFSR) used to generate pseudo random binary sequences or patterns, and which may be configured as a multiple input signature register...
7317776 Efficient pseudo-noise sequence generation for spread spectrum applications  
The invention solves the problem of efficiently generating pseudo noise sequences with an arbitrary offset delay. Novel and improved architectures are used, based on the matrix-vector pseudo noise...
7313162 Apparatus and method for calculating and implementing a Fibonacci mask for a code generator  
An apparatus and method for calculating and implementing a Fibonacci mask for a code generator is disclosed herein. The first step receives a desired code offset from a reference code state in a...
7299355 Fast SHA1 implementation  
Provided is an architecture (hardware implementation) for an authentication engine to increase the speed at which SHA1 multi-loop and/or multi-round authentication algorithms may be performed on...
7293054 Random number source and associated methods  
A random number source includes a ring oscillator generating an internal clock signal having random phase noise, and a first linear feedback shift register connected to the ring oscillator. A...
7286589 Method and apparatus for generation of downlink scrambling code in wideband CDMA mobile devices  
An initialization method is performed to initialize the states for producing downlink scrambling code for a wideband code division multiple access (WCDMA) mobile device. The initialization method...
7269258 Cryptographic key, encryption device, encryption/decryption device, cryptographic key management device, and decryption device  
A cryptographic key 1 constituted to be freely attachable and detachable to/from a personal computer 2 encrypting and decrypting data by use of a cipher key includes: a pseudo random number...
7260591 Method for synthesizing linear finite state machines  
Method and apparatus for synthesizing high-performance linear finite state machines (LFSMs) such as linear feedback shift registers (LFSRs) or cellular automata (CA). Given a characteristic...
7206797 Random number slip and swap generators  
A microelectronic apparatus and method for generating random binary words including at least one clocked pseudorandom binary number sequence generator normally operative to generate a cyclic output...
7194496 System and method for producing functions for generating pseudo-random bit sequences  
In a system and method for producing functions for generating pseudo-random bit sequences, an extended shift register (ESR) is formed. Each bit in the ESR is shifted to a next higher bit and the...
7177421 Authentication engine architecture and method  
Provided is an architecture (hardware implementation) for an authentication engine to increase the speed at which multi-loop and/or multi-round authentication algorithms may be performed on data...
7171564 Universal password generation method  
A method is provided for a user to generate a password for a software application accessible from a computer system which includes a universal password generator (UPG). The UPG includes a specified...
7142675 Sequence generator and method of generating a pseudo random sequence  
A sequence generator for generating a pseudo random sequence for random number generation or a stream cipher engine includes a plurality of linear feedback shift registers operable to generate a...
7124156 Apparatus and method for immediate non-sequential state transition in a PN code generator  
A power of a square matrix is determined in a time approximately proportional to the upper integer of the base-2 logarithm of the order of the matrix. A preferred embodiment uses two types of...
7113966 Method and apparatus for decorrelating a random number generator using a pseudo-random sequence  
A method and apparatus are disclosed for generating random numbers using the meta-stable behavior of flip-flops. A flip-flop is clocked with an input that deliberately violates the setup or hold...
7092979 Random data generator and scrambler using the same, and method therefore  
A random data generating apparatus which receives m bits, including: a first random data generator having: an m×2 m decoder which receives the m bits and outputs n bits; registers arranged in...
7082449 Method and apparatus for generating pseudo-random numbers  
A method and apparatus for generating pseudo-random numbers. The method includes defining a first set of R bits and defining a second set of S bits different from the first set of R bits. The...
7080107 Gold code generator design  
A gold code generator is described comprising two pairs of linear feedback shift registers, the seed values for the second pair of linear feedback shift registers are different from the seed values...
7053800 Apparatus and method for generating a code mask  
A new output mask for a m-sequence generator is produced by modulo-2 summing a number of intermediate masks. The intermediate masks are produced by shifting a shift template by amounts...
7046803 Random keystream generation apparatus and method for use in an encryption system  
A random keystream generation apparatus and method for use in an encryption system, generates an m-bit random keystream, using a PS-LFSR with n storage stages for storing n-bit binary data is...
7034654 Motor vehicle engine immobilizer security system and method  
Methods and apparatus are provided for insuring that a motor vehicle is being operated by an authorized operator. The apparatus includes an electronic control unit (ECU), an engine immobilizer...
7027444 Apparatus and method for generating a preamble sequence in a wireless communication system  
Disclosed is an apparatus for creating an aperiodic recursive multiplex (ARM) code having a predetermined length by receiving a first sequence having a given length. The apparatus outputs a third...
7012950 Apparatus for generating pseudo-noises code and method for generating pseudo-noise codes using the same  
An apparatus for generating pseudo-noise codes adapted for advancing or retarding pseudo-noise chips generated therefrom within one clock in a radio communication network based on code division...
6999984 Modification to reconfigurable functional unit in a reconfigurable chip to perform linear feedback shift register function  
A reconfigurable chip using reconfigurable functional units is modified to better implement linear feedback shift registers. The reconfigurable functional unit has its input multiplexer unit...
6993542 Efficient random number generation for communication systems  
Truly random numbers are generated with a minimum of extra hardware by taking advantage of the inherent noise in a communication channel. Random numbers can thus be generated without specialized...
6961403 Programmable frequency divider with symmetrical output  
A programmable frequency divider circuit with symmetrical output is disclosed. The frequency divider includes a non-symmetrical LFSR based component operated in series with a symmetrical divider...
6954770 Random number generator  
A random number generator comprising an oscillator with an output signal dependant upon a random source, a sampling device to sample the output signal from the oscillator to obtain a sampled...
6944253 Circuit and software for generating a stream cipher  
A circuit or software generates a cipher stream. The software models components or the circuit comprises a first and a second plurality of linear feedback shift registers (LFSR). A first of the...
6834291 Gold code generator design  
Embodiments for a gold code generator are generally described herein.
6832231 Multiple width random number generation  
Method and system for generating a multiple width (e.g., 16-bit width) pseudo-random number (PRN). Each of first and second 8-bit width PRNs is generated, using first and second LFSR configurations...
6816992 Test generator having a poisson distribution error signal  
A test set used for introducing a Poisson distribution of errors into a known digital data signal to produce a test signal uses an error signal generator that produces a Poisson distribution error...
6816876 Apparatus and method for modifying an M-sequence with arbitrary phase shift  
An embodiment of the invention described in the specification and drawings is an apparatus and method of generating a phase-shifted maximum length pseudo-random noise (PN) sequence without...
6807553 Digital true random number generator circuit  
A digital true random number generator circuit, comprising a linear feedback shift register having an input and an output, a system clock having a system clock frequency value for driving the shift...
6788787 Pseudorandom number generator, stream encryption method, and stream encrypting communication method  
A chaos-generating loop includes a one dimensional mapping circuit ( 13 ) with non-linear input-output characteristics for generating chaos, a linear or non-linear AD converter ( 15 ) for...
6785389 System for bitstream generation  
A bitstream generator including a plurality of linear feed shift registers (LFSRs) operative to generate a bit stream and including: at least a first LFSR operative, when assigned as a generator...
6766312 Method and system for a random number generator  
A method, system and computer readable instructions for generating a random number consisting of a plurality of binary bits is provided. A race condition gate is set. An atomic lock is accessed...
6765506 Scrambler, de-scrambler, and related method  
A scrambler includes a linear shift register having logic suitable for generating a scrambling sequence according to a predetermined generator sequence, a plurality of logic gates that allow for...
Matches 1 - 50 out of 141 1 2 3 >