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New user? Register now. Quick search: within: This issue This series All series. Cited by Ettien L. International Journal of Microwave and Wireless Technologies 9 :7, Online publication date: Mar Optical Spreading Codes. Introduction to Optical Communications. Online publication date: 1-Nov International Journal of Microwave and Wireless Technologies 9 :7, Online publication date: Mar Optical Spreading Codes. Introduction to Optical Communications.

Online publication date: 1-Nov Online publication date: 8-Dec Quick search:. This issue This series All series. PDF KB. What is claimed is: 1. A method of modulating a code-division multiple access device that receives information to be transmitted from a selected device, said method comprising the steps of:. A method of modulating a code-division multiple access device as in claim 1 wherein step c. A method of modulating a code-division multiple access device as in claim 1 further including the step of:. A method of modulating a code-division multiple access device as in claim 4 wherein said chaotic circuit is Chua's circuit.

A method of modulating a code-division multiple access device as in claim 5 wherein Chua's circuit includes a Chua's diode and said seed signal is a voltage across said Chua's diode that is normalized. A method of communication between first and second code-division multiple access devices that transmit selected information therebetween via a selected medium, said method comprising the steps of:.

A method of communication between first and second code-division multiple access devices as in claim 7 wherein step c. A method of communication between first and second code-division multiple access devices as in claim 7 further including the steps of:.

Code Division Multiple Access (CDMA)

A method of communication between first and second code-division multiple access devices as in claim 7 wherein step f. A method of communication between first and second code-division multiple access devices as in claim 7 , preceding step a. A method of communication between first and second code-division multiple access devices as in claim 11 wherein:. A method of modulating a code-division multiple access device as in claim 7 or 11 wherein said chaotic circuit is Chua's circuit. A method of modulating a code-division multiple access device as in claim 7 or 11 wherein said chaotic circuit is a Chua's circuit that includes a Chua's diode and said seed signal is a normalized signal of the voltage across said Chua's diode.

A method of modulating a code-division multiple access device as in claim 12 wherein each of said first and second chaotic circuits is Chua's circuit. A method of modulating a code-division multiple access device as in claim 15 wherein each of Chua's circuits includes a Chua's diode and said seed signal from each of said Chua's circuits is a voltage across said Chua's diode that is normalized.

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A method of communication between first and second code-division multiple access devices as in any one of claims 7 - 12 further includes the repetition of all of the recited steps for transmitting information from said second code-division multiple access device to said first code-division multiple access device. A method of communication between first and second code-division multiple access devices as in any one of claims 7 - 12 wherein:. A code-division multiple access device to transmit and receive selected information to and from other code-division multiple access devices, said code-division multiple access device comprising:.

A code-division access device as in claim 24 further includes a key signal generator couple to said spectrum spreading device to scramble said carrier signal using a preselected code. A code-division access device as in claim 24 wherein said chaotic seed signal is generated by chaotic circuit having the same preselected initial conditions as assigned to said second code-division multiple access device with which communication is established.

A code-division multiple access device as in claim 28 wherein said chaotic circuit is Chua's circuit. A code-division multiple access device as in claim 29 wherein Chua's circuit includes a Chua's diode and said seed signal is a voltage across said Chua's diode that is normalized. A code-division multiple access communication system comprising:. A code-division multiple access communication system as in claim 32 wherein each of said first and second code-division multiple access devices further includes a key signal generator coupled to said spectrum spreading device to scramble said carrier signal each using a matching preselected code.

A code-division multiple access communication system as in claim 32 wherein said chaotic device includes a first chaotic circuit coupled to said first code-division multiple access device and a second chaotic circuit coupled to said second code-division multiple access device with both said first and second chaotic circuits having the same preselected initial conditions. A code-division multiple access communication system as in claim 36 wherein each of said first and second chaotic circuit is a Chua's circuit.

A code-division multiple access communication system as in claim 37 wherein Chua's circuit includes a Chua's diode and said seed signal is a voltage across said Chua's diode that is normalized. A code-division multiple access communication system as in claim 36 or 37 further includes a synchronization circuit to randomly select and apply said initial conditions to each of said first and second chaotic circuits and to apply impulsive synchronization to each of said first and second chaotic circuits at preselected intervals to maintain said first and second spread spectrum signals substantially the same during interaction between said first and second code-division multiple access devices.

Which Carriers Are CDMA? Which Are GSM?

A code-division multiple access communication system as in claim 35 further includes a synchronization circuit to randomly select and apply said preselected code to each of said key signal generators. A code-division multiple access communication system as in any one of claims 32 - 41 wherein:.


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TABLE 1. Results of different statistical tests of chaotic. TABLE 2. TABLE 3. TABLE 4. USP true USB1 en. AUA en. WOA1 en.


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    Lecture 26: Introduction to Code Division Multiple Access (CDMA)

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    Code-division multiple access | omaquvacexys.tk

    Andrew J. Donald E. Knuth, The Art of Computer Programming, second edition, vol. Geng Wu, et al. Jorge A. Ulloa, et al. Cruz, et al.

    What is CDMA (Code Division Multiple Access)?

    Sean Halle, et al. Klein S. Gilhousen, et al. Leon O. Chua, et al. Sobhy, et al. Marvin K. Simon, et al. Michael G. Jansen, et al. Naohiko Inaba, et al. Raymond L. Pickholtz, et al. Tao Yang, et al. Vijay K. Garg, et al. William C. Lee, Mobile Cellular Telecommunications, Second edition, , pp. Yoshifumi Nishio, et al. Multi-tier ad-hoc network in which at least two types of non-interfering waveforms are communicated during a timeslot.

    CNB en. KRB1 en. EPB1 en. System and method for generating signal waveforms in a CDMA cellular telephone system.

    Chaotic Digital Code-Division Multiple Access (CDMA) Communication Systems

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    JPB2 en. Apparatus and communication method based on orthogonal Hadamard reference sequence with the selected correlation properties. Method and apparatus for reducing amplitude variations and interference in communication signals, such as in wireless communication signals employing inserted pilot symbols. USA1 en.

    EPA2 en. Cell search procedure for time division duplex communication systems using code division multiple access. Method and apparatus for improving detection of data bits in a slow frequency hopping communication system.