Multi-User Ultra-Wide Band Communication System Based on Modified Gegenbauer and Hermite Functions

Abstract. Known for many years but unexploited in the field of communications, ultra wideband systems (UWB) can be a solution to the saturation of the frequency bands. The advantage of such systems is that they are inexpensive in energy because of the limitations imposed by the standard. Our work is to design a high data rate IR-UWB system, through the use of modulation M-OAM (Orthogonal Amplitude Modulation), and the study of the system performances by adding the effect of the propagation channels dedicated to the UWB. The channel modeling is an important step in the implementation of any system, especially for those in development, as is the case of UWB systems. Although this model is one of the key elements of the overall chain system, it must take into account the distance between the two antennas, multipath and signal type. In this paper, we discover the existing models suitable for UWB channels and their implementation on our M-OAM system. The introduction of real channels in our chain of transmission reduces the quality of our system. Therefore, a RAKE receiver is proposed as a solution to improve performance.

show abstract

“…These waveforms have been developed in IEMN_DOAE and IFSTAR-LEOST laboratories for communication applications [4] [5].…”

Section: Modified Gegenbauer Functionsmentioning

confidence: 99%

UWB System Based on the M-OAM Modulation in IEEE.802.15.3a Channel

Hamidoun¹,

Elassali²,

Elhillali

et al. 2014

Technological Innovation for Collective Awareness Systems

Self Cite

View full text Add to dashboard Cite

show abstract

“…In this paper, we propose to use the Modified Gegenbauer Functions (MGF), derived from orthogonal polynomials [2], to achieve the multiple access needed in our application.…”

Section: Proposed Systemmentioning

confidence: 99%

“…Several properties speak in favour of the use of UWB technique such as: high data rate, low probability of interception and detection, system simplicity, low cost, reduced average power consumption, low sensitivity to the near-far problem or immunity to interference [2] [3].…”

Section: Introductionmentioning

confidence: 99%

Novel approach of UWB multi-band system based on orthogonal function for transports applications

Elbahhar

Lamari

Rivenq

et al. 2011

Eur. Phys. J. Appl. Phys.

Self Cite

View full text Add to dashboard Cite

Abstract. Ultra Wide Band (UWB) is based on the transmission of very short pulses with relatively low energy. This technology may see increased use in the wireless communications and sensing application. Having the available bandwidth of 7.5 GHz and the minimum signal bandwidth of 500 MHz, UWB systems can be divided into two groups: Impulse communication system and Multi-band system. In multi-band, the spectrum is divided into several sub-bands. In this paper, we propose this technique for subway transport systems; especially for communication between trains or train-infrastructure. So, the main purpose of this paper is to make use of the original mathematical tools called orthogonal functions to allow a multi-user communication system for multi band UWB transmission. The BER values will be calculated and analyzed using computer simulations in the presence of multi-user interference, in order to evaluate the performances of the proposed system. These BER values will be given for two cases: the users in the same sub-band and a single user per sub-band. We will show that the proposed orthogonal waveforms give good performances in terms of BER and are able to reduce multi-user interference. The proposed method has many potentials advantages in terms of complexity and implementation.

show abstract

“…The orthogonal functions are introduced as basis functions for the pulse shapes in a multi-band system. It is shown in [9] that MGF offer better performance for multi-user UWB communication. The orthogonality of these MGF is then exploited here to construct a multi-band UWB location and communication system and to reduce the Multi-User Interference (MUI) in asynchronous communications.…”

Section: Studied Systemmentioning

confidence: 99%

“…The use of Gegenbauer polynomials in ultra wideband communication has recently been proposed [9,10] in the impulse radio (baseband)case. The polynomials are defined on the interval [-1, 1] and verify the orthogonality relation:…”

Section: Modified Gegenbauer Functionsmentioning

confidence: 99%

Performance Evaluation of a Multi-band UWB Location and Communication System Based on Modified Gegenbauer Functions

Lamari

Elbahhar

Rivenq

et al. 2008

Wireless Pers Commun

Self Cite

View full text Add to dashboard Cite

Ultra Wide Band (UWB) may offer very effecient solutions for various communication and sensing applications. Two approaches have emerged, which meet all the communication requirements: impulse and multi-band systems. The first system operates between 3.1 to 10.6 GHz in a single frequency band. The second one exploits the division of the bandwidth into sub-bands (each sub-band width being up to around 500 MHz wide). The present work is concerned in the second approach. So, we propose to use orthogonal functions called Modified Gegenbauer Functions (MGF) in the multi-band UWB system. Different scenarios are studied and compared in the scope of a system offering communication and location capabilities for subway trains. In order to evaluate the performance of the proposed system, the Bit Error Rate (BER) values are calculated and analyzed in the presence of multi-user interference, assuming asynchonous users. It is shown that Gegenbauer functions offer the performance required for our multi-band UWB communication and location system.

show abstract

Multi-User Ultra-Wide Band Communication System Based on Modified Gegenbauer and Hermite Functions

Cited by 32 publications

References 9 publications

UWB System Based on the M-OAM Modulation in IEEE.802.15.3a Channel

UWB System Based on the M-OAM Modulation in IEEE.802.15.3a Channel

Novel approach of UWB multi-band system based on orthogonal function for transports applications

Performance Evaluation of a Multi-band UWB Location and Communication System Based on Modified Gegenbauer Functions

Contact Info

Product

Resources

About