Multi Pulse Position Amplitude Modulation for ultra-high speed time-hopping UWB communication systems over AWGN channel

Herceg, Marijan; Žagar, Drago; Galić, Dario

doi:10.1109/isccsp.2010.5463491

Cited by 5 publications

(3 citation statements)

References 12 publications

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“…Various multilevel modulation schemes using a combination of PPM and pulse-amplitude modulation (PAM) have been proposed in the literature in order to improve the spectralefficiency of pulse-position based modulations [5], [6], [7]. In these works, all combinations of PPM and PAM are considered as symbols, and therefore, the minimum distance between symbols is small.…”

Section: Introductionmentioning

confidence: 99%

Multilevel pulse-position modulation based on balanced incomplete block designs

Noshad

Brandt-Pearce

2012

2012 IEEE Global Communications Conference (GLOBECOM)

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In this paper, two new modulation schemes using multilevel pulse-position modulation (PPM) for application in unipolar optical wireless systems are presented. Balanced incomplete block designs (BIBD) are used for constructing the symbol alphabets. Each symbol is obtained by combining multiple codewords of a BIBD code. In one scheme the symbols have equal energies, and therefore, no threshold is needed to make a decision on the received signal. The other modulation has better performance yet higher complexity. Since cyclic BIBDs are used for constructing the symbols, the transmitters and receivers have simple structures, and can be implemented using shift registers. These schemes can achieve high spectral-efficiencies, and are therefore suitable for systems with bandlimited sources or highly dispersive channels, where intersymbol interference (ISI) has a significant impact on the performance. We also show that using the same receiver structure, the constellation size can be increased by including the complements of the codewords. The performance of the proposed schemes are compared to other modulation schemes for both LED-based non-dispersive and dispersive freespace optical (FSO) systems.Index Terms-Multilevel modulation, pulse position modulation (PPM), balanced incomplete block design (BIBD), free space optical (FSO) systems, spectral-efficiency

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Section: Introductionmentioning

confidence: 99%

Multilevel pulse-position modulation based on balanced incomplete block designs

Noshad

Brandt-Pearce

2012

2012 IEEE Global Communications Conference (GLOBECOM)

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“…Furthermore, N-ary PPM requires N correlators in the optimal receiver, which significantly increases the hardware complexity. To solve these problems and to increase the transmission data rate, the multi pulse position amplitude modulation (MPPAM) scheme [8], which is based on the simultaneous position and amplitude level of the multiple pulses, is proposed. This paper is organized as follows.…”

Section: Introductionmentioning

confidence: 99%

Performance of Multi Pulse Position Amplitude Modulation for TH IR-UWB Communication Systems

2012

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Original scientific paperThe multi pulse position amplitude modulation scheme for time-hopping multiple access impulse radio ultrawideband communication systems has been presented in this paper. Multi pulse position amplitude modulation is a hybrid modulation technique, which combines multi pulse position modulation and pulse amplitude modulation. It is shown that multi pulse position amplitude modulation significantly outperforms pulse position modulation with respect to bandwidth efficiency. The multi pulse position amplitude modulation error probability over IEEE 802.15.3a multipath fading channels in multiuser environment is derived. The system analysis shows that the proper selection of modulation parameters can improve the system performance at the cost of hardware complexity (and vice versa).Key words: Ultra-wideband, Multi pulse position modulation, Pulse amplitude modulation, Multipath channel Performanse višeimpulsno-pozicijske amplitudne modulacije za TH IR-UWB komunikacijske sustave. U ovom je radu predstavljena višeimpulsno-pozicijska amplitudna modulacijska shema za impulsne ultraširokopojasne radiokomunikacijske sustave, zasnovana na višekorisničkom pristupu s vremenskim skakanjem. Višeimpulsno-pozicijska amplitudna modulacija je hibridni modulacijski postupak, koji je kombinacija višeimpulsno-pozicijske modulacije i impulsno-amplitudne modulacije. Pokazano je da višeimpulsno-pozicijska amplitudna modulacija značajno nadmašuje impulsno-pozicijsku modulaciju u pogledu pojasne učinkovitosti. Izvedena je vjerojatnost pogreške višeimpulsno-pozicijske amplitudne modulacije u kanalu IEEE 802.15.3a s višes-taznim rasprostiranjem i iščezavanjem signala u višekorisničkom okruženju. Analiza sustava pokazuje da odgovarajući izbor parametara modulacije može poboljšati performanse sustava uz povećanje složenosti sklopovlja (i obrnuto).Ključne riječi: ultra-široki pojas, višeimpulsno-pozicijska modulacija, impulsno-amplitudna modulacija, kanal s višestaznim rasprostiranjem

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“…Various multilevel modulation schemes using a combination of PPM and pulse-amplitude modulation (PAM) have been proposed in the literature in order to improve the spectral-efficiency of pulse-position based modulations [48], [49], [50]. In these works, all combinations of PPM and PAM are considered as symbols, and therefore, the minimum distance between symbols is small.…”

Section: Multilevel Expurgated Pulse Position Modulationmentioning

confidence: 99%

Applications of Balanced Incomplete Block Designs to Communication Systems

Iranzad

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Balanced incomplete block design (BIBD) is an area of combinatorial mathematics that was first introduced in 1936 and developed very fast. Because of their unique fixed cross-correlation property, BIBDs have attracted the attention of researchers in communication systems. BIBDs have been used in various areas, such as error control coding, cryptography, code division multiple access networks, key distribution in sensor networks and watermarking. Among different BIBDs, symmetric designs are often used as codes; in order to simplify the signal processing, cyclic structures are of greatest interest.In this dissertation, we introduce new applications of symmetric BIBDs in communication systems, with special emphasis on optical communications, and use them primarily in constructing the symbols of novel M -ary modulation schemes. The first modulation technique introduced is a spectral amplitude encoded scheme that uses BIBDs as the encoding pattern, and is shown to achieve a high bit-rate in non-line-of-sight ultraviolet (NLOS-UV) systems. The other three modulation schemes are based on pulse position modulation technique, and are proposed for application is systems with certain restrictions, such as peak-power limited systems. Because of the structure of the symbols in these modulation schemes, the symbols are susceptible to interference between adjacent time-chips, and the error probability increases in dispersive channels. We introduce a technique to decrease the interference effect on these three modulation schemes by interleaving the transmitted pulses at the transmitter and de-interleaving them at the receiver.We then study the application of the new modulation schemes to visible light communication (VLC) systems. VLC is an appealing technology that is proposed for wireless indoor networking. Using this technique internet access can be provided by LED-based lighting system. Due to the integration of the illumination system with the communication system, it is crucial that the modulation techniques support lighting features. Dimming and low-fluctuations are the most challenging features to be supported by a communication system. We show that the proposed modulation techniques are able to provide a wide range of dimming levels and have a low fluctuation effect. We also present two techniques that enable VLC systems to provide simultaneous high-speed network access for multiple users.First and foremost, I would like to express my sincere gratitude towards my supervisor, Professor Maïté Brandt-Pearce, for her support, encouragement, and patience during my PhD career.

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Multi Pulse Position Amplitude Modulation for ultra-high speed time-hopping UWB communication systems over AWGN channel

Cited by 5 publications

References 12 publications

Multilevel pulse-position modulation based on balanced incomplete block designs

Multilevel pulse-position modulation based on balanced incomplete block designs

Performance of Multi Pulse Position Amplitude Modulation for TH IR-UWB Communication Systems

Applications of Balanced Incomplete Block Designs to Communication Systems

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