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In this article, a novel receiver for Ultra-wideband (UWB) communication based the emerging theory of Compressed Sensing (CS) is proposed. Our proposals focus on solving two following problems. At First, according to the concept of CS that gets from the sparsity of the most signal to attain dependable demodulation via a comparatively small number of measurements, the receiver would be designed to...
In this paper, a novel transceiver for the Ultra-Wideband (UWB) communication based on emerging theory of compressed sensing (CS) is exploited. The proposed approach of this article is to apply the CS theory for UWB communication to solve the bottleneck of the sampling at the receiver. CS appears to be a natural solution to solve this problem. Our major contribution is to exploit the sparsity of the...
The ultra-wide band (UWB) technology can be used for low cost and low power applications such as body area networks, IoT based applications, wireless sensor networks and high data rate short range wireless communications. In the UWB literature, non-coherent energy detector (ED) receiver is proposed to reduce receiver implementation complexity by avoiding the complex channel estimation process and...
Pulse shape modulation (PSM) is new and one of the best modulation scheme for Ultra-wideband (UWB) communication due to its low interference, multi-dimension data transmission and asynchronous demodulation features. The PSM scheme uses orthogonal pulses for data transmission as reported in the UWB literature. It is also known that the pulse geometry can change significantly by passing through a filter...
In this paper, we propose a new method for mitigating narrowband interference in Ultra-WideBand (UWB) communication systems based on Orthogonal Frequency Division Multiplexing (OFDM). Spreading data symbols to some subcarriers, the interference is effectively mitigated. However, the range to be spread for the interference is limited in conventional methods. In the proposed method, we widen more the...
Ultra wide-band (UWB) technology is suitable for high data rate short range wireless communication, localization, and imaging techniques. In many applications, UWB devices may be operating in environments with impulse noise sources or narrow band interferers, called as impulse interferer. Impulse noise of high amplitude and random occurrences can overlap a UWB signal making UWB signal recovery difficult...
Ultrawideband (UWB) is a promising technology for getting high data rate communications. UWB communications refer to the utilization of signals with a frequency range (3.1 to 10.6 GHz) on the condition of having a fractional bandwidth of 20% or absolute bandwidth of 500 MHz or higher. The limited power spectral density of − 41.3 dBm/MHz allows UWB communications to be safely deployed with existing...
Ultra-wideband (UWB) communication techniques are highly interesting because they seek to rearrange the huge spectrum of UWB for diverse applications. Therefore, UWB is the main technique employed in communication systems for 4G wireless networks. However, several issues in UWB technology, such as interference with various existing civil and military communication systems, require resolution. In this...
The robustness of the time reversal (TR) scheme in a non stationary channel environment has been previously studied for ultra-wide band (UWB) channels. However, its robustness with different bandwidth specially for bandwidths significantly lower than ultra-wide bandwidths has not been established. In this paper, the performance of a TR communication system has been studied for large number of bandwidths...
A pre-coding based compressed sensing (CS) ultra-wideband (UWB) communication system is proposed in this paper. Our major contribution is that we attempt to achieve effective signal measurement required in CS by applying a digital random pre-coding block at the transmitter instead of analog schemes. By exploiting pulse modulation and UWB channel as parts of CS measurement process, signal model from...
The asymptotic signal bandwidth of various kinds of large-scale asynchronous Time Hopping Impulse Radio Ultra-Wide Band (TH-IR UWB) communication networks such that multiple access interference can be negligible with respect to output noise with high probability is derived. The asynchronous TH-IR UWB communication networks consist of n nodes distributed in a cube (three-dimension) or on a square (two-dimension)...
Ultra-wideband(UWB) radio has gained a major breakthrough in wireless communications. However, the sampling is a huge obstacle to it. Applying compressed sensing(CS) principle which can recover a sparse signal from less measurement to UWB communication has been a hot topic for many years. This paper shows two methods to construct the CS model for UWB communication, jointing the signal reconstruction...
The paper analyzes M-ary modulation schemes of time hopping ultra-wideband (TH-UWB) system. Based on the performance analysis of the two conventional multiple modulation schemes TH PPM and TH PAM, a combined modulation scheme (TH OPPM-BPSM) is analyzed. By introducing the modified Hermite polynomial (MHP) orthogonal pulses, three transmission schemes are analyzed through computer simulations under...
A highly efficient QPSK demodulator module is presented, which synchronizes carrier phase and frequency in the analog domain by feed-forward carrier recovery. By this, the need for high-precision ADCs is eliminated, which become especially problematic for data rates exceeding several Gbit/s. The QPSK demodulator is realized as a SiGe HBT MMIC and is packaged on a standard low cost substrate material,...
Energy detectors (ED) and transmitted reference (TR) systems are known as promising candidates for noncoherent UWB receivers. One way of non-coherent communication, is to use a transmitted reference (TR) pulse for detection. In conventional TR, the reference pulse and data bearing pulse are multiplexed in time domain. In frequency shifted reference (FSR) method, these pulses are multiplexed in the...
This paper presents the wireless network architecture to provide multilingual speech translation and local positioning system during Hajj operations. The pilgrims require low power, low cost and compact ear connected devices to receive the information in their native language. The proposed RF transceiver front-end design consists of multiple numbers of oscillators tuned within spectrum of 5-to-8.5...
In impulse-based UWB systems, positional accuracy is inversely proportional to the signal bandwidth. In this work, a number of anchor nodes are located at fixed positions in an indoor environment transmitting synchronized 2.5ns pulses with Differential Binary Phase Shift Keying (DBPSK) modulation. An UWB receiver mounted on a mobile robot utilizes Time Difference of Arrival (TDOA) between pairs of...
We proposed power line communication (PLC) through a microprocessor's power distribution network as a novel technique for communicating to any node inside a chip and demonstrated the suitability of Impulse Ultra-Wideband (UWB) communication. Applications of this scheme discussed in this paper exemplify the applicability of this scheme in future microprocessors. Further, data recovery block design...
Ultra Wide Band (UWB) is foreseen to support a physical layer in Body Area Networks (BAN). The nature of the channel leads to the spread of the signal energy through the numerous paths from the reflexions in the environment. With such a multipath channel, inter-pulses interference (IPI) may occur if the channel delay spread is longer than the interval between two consecutive pulses. An energy detector...
This paper addresses the robustness of FM-UWB BAN radio to frequency-selective multipath and interference. Examples of the FM-UWB radio performance with IEEE802.15.6 BAN channel models are given. Robustness to interference is demonstrated and interference mitigation solutions at the physical layer of the receiver front-end are presented and illustrated with simulation results.
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