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Ultra-wideband pulse modulation system and methodRelated Patent Categories: Pulse Or Digital Communications, Spread SpectrumUltra-wideband pulse modulation system and method description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070153875, Ultra-wideband pulse modulation system and method. Brief Patent Description - Full Patent Description - Patent Application Claims
[0001] This application claims priority under 35 U.S.C. .sctn.120 as a continuation of U.S. patent application Ser. No. 10/425,936, filed Apr. 28, 2003, entitled "Ultra-Wideband Pulse Modulation System and Method," which claims priority to a U.S. Provisional Application, Ser. No. 60/452,020, filed Mar. 3, 2003, titled: "Ultra-Wideband Pulse Modulation System and Method," which is referred to and incorporated herein in its entirety by this reference. FIELD OF THE INVENTION [0002] The present invention generally relates to ultra-wideband communications. More particularly, the invention concerns a method of modulating ultra-wideband pulses for wire and wireless communications. BACKGROUND OF THE INVENTION [0003] The Information Age is upon us. Access to vast quantities of information through a variety of different communication systems are changing the way people work, entertain themselves, and communicate with each other. For example, as a result of increased telecommunications competition mapped out by Congress in the 1996 Telecommunications Reform Act, traditional cable television program providers have evolved into full-service providers of advanced video, voice and data services for homes and businesses. A number of competing cable companies now offer cable systems that deliver all of the just-described services via a single broadband network. [0004] These services have increased the need for bandwidth, which is the amount of data transmitted or received per unit time. More bandwidth has become increasingly important, as the size of data transmissions has continually grown. Applications such as movies-on-demand and video teleconferencing demand high data transmission rates. Another example is interactive video in homes and offices. Moreover, traffic across the Internet continues to increase, and with the introduction of new applications, such as the convergence of voice and Internet data, traffic will only increase at a faster rate. Consequently, carriers and service providers are overhauling the entire network infrastructure--including switches, routers, backbone, and the last mile (i.e., the local loop)--in an effort to provide more bandwidth. [0005] Other industries are also placing bandwidth demands on Internet service providers, and other data providers. For example, hospitals transmit images of X-rays and CAT scans to remotely located physicians. Such transmissions require significant bandwidth to transmit the large data files in a reasonable amount of time. The need for more bandwidth is evidenced by user complaints of slow Internet access and dropped data links that are symptomatic of network overload. [0006] Therefore, there exists a need for a method to increase the bandwidth of wired network or communication system, as well as a wireless network or communication system. SUMMARY OF THE INVENTION [0007] The present invention provides a method of modulating an ultra-wideband (UWB) signal comprised of a multiplicity of UWB pulses. The pulse can be transmitted and received wirelessly, or through any wire medium, whether the medium is twisted-pair wire, coaxial cable, fiber optic cable, or other types of wire media. [0008] One embodiment of the present invention provides an UWB pulse modulation method that increases the available bandwidth of a communication system by enabling the simultaneous transmission of conventional carrier-wave signals and ultra-wideband pulses. The method includes transforming the data into a ternary data set with data being represented with states of zero, positive one and negative one. The modulation and pulse transmission method of the present invention enables the simultaneous coexistence of the ultra-wideband pulses with conventional carrier-wave signals. The present invention may be used in wireless and wired communication networks such as hybrid fiber-coax networks. [0009] In one embodiment of the present invention, data is transformed so that it will always include a zero in every pair of transmitted data bits. Zeros in the modulation technique of the present invention are represented by the absence of electromagnetic energy. Therefore, by ensuring a zero in every pair of transmitted data bits, the average energy transmitted into the radio frequency spectrum is reduced. This reduces the possibility of interfering with other signals, and alternatively, in another embodiment of the present invention, may allow the power of each ultra-wideband pulse to be increased. [0010] One feature of the present invention is that the transmitted ultra-wideband pulses have a spectral power density that does not cause interference with other communication signals. [0011] Thus, the ultra-wideband pulses transmitted according to the methods of the present invention enable a significant increase in the bandwidth, or data rates of a communication system. [0012] These and other features and advantages of the present invention will be appreciated from review of the following detailed description of the invention, along with the accompanying figures in which like reference numerals refer to like parts throughout. BRIEF DESCRIPTION OF THE DRAWINGS [0013] FIG. 1 is an illustration of different communication methods; [0014] FIG. 2 is an illustration of two ultra-wideband pulses; [0015] FIG. 3 is an illustration of time bins within ultra-wideband (UWB) pulse transmission frames according to three embodiments of the present invention; [0016] FIG. 4 is an illustration of a data manipulation method according to one embodiment of the present invention; [0017] FIG. 5 is an illustration of UWB pulses positioned in time bins within UWB pulse transmission frames according to one embodiment of the present invention; [0018] FIG. 6 is an illustration of UWB pulses positioned in time bins within UWB pulse transmission frames according to one embodiment of the present invention; [0019] FIG. 7 is an illustration of UWB pulses positioned in time bins within UWB pulse transmission frames according to one embodiment of the present invention; [0020] FIG. 8 is an illustration of UWB pulses positioned in time bins within UWB pulse transmission frames according to one embodiment of the present invention; Continue reading about Ultra-wideband pulse modulation system and method... 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