ultra-wideband multiple-access communications
Multistage Frequency Hopping Assisted Ultra Wideband Multiple Access Communications
... FHMA communications the FH patterns must be assigned such that: a) there is no ambi- guity concerning the identity of the user and the information it transmits; b) the probability of a hit or collision between the ...
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Residue Number System Assisted Fast Frequency Hopped Synchronous Ultra Wideband Spread Spectrum Multiple Access: A Design Alternative to Impulse Radio
... novel multiple-access scheme, namely MS/UWB FHMA, which is suitable for ultra-wideband wireless communications using FFH tech- niques in conjunction with MFSK modulated narrowband ...
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Enhancing the bit error rate performance of ultra wideband systems using time hopping pulse position modulation in multiple access environments
... multiplexing multiple signals on a single transmission line using time-domain processing methods described in a patent by Ross, et ...UWB communications. After this developing wireless UWB ...
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Timing Acquisition with Noisy Template for Ultra Wideband Communications in Dense Multipath
... Emerging interest in commercial applications of UWB radios focuses on dense-multipath indoor wireless commu- nications [10]. In a dense-multipath channel, the received signal no longer has a low-duty cycle, as each ...
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Ultra-wideband and mmWave Channel Propagation for Public Safety and UAV Communications.
... voice communications between pilots and ground ...and multiple access were frequency division with manual channel assignment by air traffic ...AG communications con- tinues to use the reliable ...
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Development Of Cross Layer Pulse-Based Ultra-Wideband Communication System For Short Range Wireless Application
... radio ultra-wideband (IR-UWB) appears to have the potential to overcome this ...of ultra-wideband radio, typically on the order of the gigahertz (GHz), allows for the resolution of multipath ...
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Principles and Limitations of Ultra Wideband FM Communications Systems
... the wideband FM delay-line demodulator in the pres- ence of a single FM ...the wideband FM demodulator strongly influences the receiver ...division multiple access (FDMA) subcarrier ...
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Adaptive low-rank channel estimation for multi-band OFDM ultra-wideband communications
... part, multiple users are allowed to use the same fre- quency-band group simultaneously to provide frequency diversity as well as channelization and multiple-access capability among different ...by ...
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A New Time Hopping Multiple Access Communication System Simulator: Application to Ultra Wideband
... These links can correspond to di ff erent real users transmit- ting and receiving through different terminals or to different links established between two terminals in order to achieve a higher aggregate bit rate. No ...
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Prefiltering-Based Interference Suppression for Time-Hopping Multiuser UWB Communications over MISO Channel
... pulsed ultra-wideband (UWB) system by shifting the signal processing needs from the receiver at the radio terminal (RT) to the transmitter at the fixed access point (AP) where power and computational ...
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Millimeter Wave Ultra Wideband Six Port Receiver Using Cross Polarized Antennas
... This paper presents a new low-cost millimeter-wave ultra-wideband (UWB) transceiver architecture operating over V-band from 60 to 64 GHz. Since the local oscillator (LO) power required in the operation of ...
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An extension of the RiMAX multipath estimation algorithm for ultra wideband channel modeling
... in multiple UWB sub-bands, the advantage of our algorithm is that the AoD, AoA, and ToA are kept constant over the entire UWB bandwidth in the initialization procedure, ensuring that geometrical propagation ...
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Ultra Wideband Radio
... wireless communications” as possibilities, including vehicle collision avoidance, public safety systems (including motion detection applications), RF tags for personnel and as- set tracking, location-aware ad hoc ...
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UWB MAC Design Constraints and Considerations
... The adoption of CSMA/CA as a distributed protocol must be jointly evaluated with the performance of the underlying UWB physical layer. In general it may not be a suitable choice for an UWB MAC unless proper ...
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Ultra Wideband Channel Modeling for Intravehicle Environment
... the ultra-wide bandwidth of the UWB signals, the time delay di ff erence between resolvable paths, which normally equals the reciprocal of the bandwidth, is much smaller than that of the narrowband ...
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Wideband Code Division Multiple Access (W CDMA) Tutorial
... In January 1998, European Telecommunications Standards Institute (ETSI) decided to choose the W–CDMA technology to be the multiple access techniques for the third- generation mobile telephone system. For a ...
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Design of a rectangular Patch AntennaAmandeep Bath, Abhishek Thakur, Jitender Sharma, Prof. Basudeo Prasad
... 1) Ultra-wide band antennas have already been used in applications such as satellite communication, remote sensing, ultra wide band radar technology and so ...Wireless communications is enjoying ...
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Enhancing the energy efficiency of ultra wideband (UWB) based media access control (MAC) protocols in mobile ad hoc networks (MANETs) through the use of steerable directional antenna
... The simulation time is 140sec and assumed to be in a real-life connection. A number of three repeated iterations are made on the scenarios created to enable the simulation to obtain accurate results. The steerable ...
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An Ultra Wideband Monopole Antenna with Multiple Fractal Slots with Dual Band Rejection Characteristics
... In recent years, research in the area of ultra wideband (UWB) systems has generated a lot of interest among microwave engineers. Feb. 2002 witnessed the allocation of frequency range 3.1 to 10.6 GHz as the ...
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Feed line calculations of microstrip antenna
... Abstract— A patch antenna is a type of radio antenna with a low profile, which can be mounted on a flat surface. It consists of a flat rectangular sheet or "patch" of metal, mounted over a larger sheet of metal ...
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