On the optimum pulse-position modulation index for ultra-wideband communication

Onunkwo, Uzoma; Li, Ye

doi:10.1109/casset.2004.1322921

Cited by 7 publications

(6 citation statements)

References 10 publications

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“…η not only depends on the autocorrelation characteristic of the pulse p (t), but also the index . The role of in the reduction of BER has been studied in detail in [11]. We just adopt the best value of for a given p (t) here.…”

Section: B Pulse Shape Effect On Mui Reductionmentioning

confidence: 99%

A Pulse Shape Design Method for Ultra-Wideband Communications

Gao

Venkatesan

2007

2007 IEEE Wireless Communications and Networking Conference

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A new design method to generate pulses for ultrawideband (UWB) communication systems is presented. The systematic searching method is based on the linear combination of a number of Gaussian derivative pulses to form one single pulse whose power spectral density (PSD) not only conforms to the FCC spectral mask, but also effectively exploits the allowable bandwidth and power. In addition, the effect of pulse shaping on the mitigation of multi-user interference (MUI) is also taken into consideration in the proposed pulse shape design method. In particular, we develop a parameter called normalized meansquared partial pulse correlation, which only has relation with the pulse shape and can directly affect the signal-to-noise ratio (SNR) of the receiver in a multi-user environment. By choosing a pulse which minimizes this parameter, we obtain the desired pulse shape. Compared with the widely used single Gaussian derivative pulses, the pulses we designed achieve better bit error rate performance in both single link and multi-user TH-PPM and TH-BPSK UWB communication systems.Index Terms-ultra-wideband (UWB), pulse shape design, Gaussian derivative, multi-user interference (MUI)

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Section: B Pulse Shape Effect On Mui Reductionmentioning

confidence: 99%

A Pulse Shape Design Method for Ultra-Wideband Communications

Gao

Venkatesan

2007

2007 IEEE Wireless Communications and Networking Conference

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“…The performance of IR-UWB has been extensively studied [17]- [19]. Some work on the optimization of IR-UWB systems considering antenna design, synchronization and channel capacity are also present in the literature [20]- [23]. However, none of these optimizations is aimed at minimizing the energy consumption in IR-UWB systems.…”

Section: Related Workmentioning

confidence: 99%

Link Energy Minimization in IR-UWB Based Wireless Networks

Wang

Heinzelman

Seyedi

2010

IEEE Trans. Wireless Commun.

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Impulse Radio Ultra WideBand (IR-UWB) communication has proven to be an important technique for supporting high-rate, short-range, and low-power communication. In this paper, using detailed models of typical IR-UWB transmitter and receiver structures, we model the energy consumption per information bit in a single link of an IR-UWB system, considering packet overhead, retransmissions, and a Nakagami-m fading channel. Using this model, we minimize the energy consumption per information bit by finding the optimum packet length and the optimum number of RAKE fingers at the receiver for different transmission distances, using Differential Phase-shift keying (DBPSK), Differential Pulse-position Modulation (DPPM) and On-off Keying (OOK), with coherent and non-coherent detection. Symbol repetition schemes with hard decision (HD) combining and soft decision (SD) combining are also compared in this paper. Our results show that at very short distances, it is optimum to use large packets, OOK with non-coherent detection, and HD combining, while at longer distances, it is optimum to use small packets, DBPSK with coherent detection, and SD combining. The optimum number of RAKE fingers are also found for given transmission schemes.

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“…The specific effect of timing jitter on an impulse radio system depends on the modulation scheme being used. For instance, when the PPM modulation scheme is used, timing jitter distorts the correlation at the optimal modulation index [20]. Without loss of generality, consider the basic Gaussian pulse function with c = 0:…”

Section: Fig 6: Am/am Amplifier Characteristics (Rapp Model)mentioning

confidence: 99%

“…The timing jitter is often modeled as wide sense stationary Gaussian process with zero mean and variance σj² [20]. As indicated in [21] and [22], the RMS (Root Mean Square) of timing jitter, σj², typically ranges from 10 to 150 ps in UWB receivers.…”

Section: Fig 7: Correlation Dependency On Modulation Index δmentioning

confidence: 99%

“…As indicated in [21] and [22], the RMS (Root Mean Square) of timing jitter, σj², typically ranges from 10 to 150 ps in UWB receivers. It can be seen that for less amount of white jitter (variance in the order of delta/10, where delta is the optimum PPM shift), the effects are negligible but when the white jitter variance becomes higher (in the order of delta/5) significant performance degradation is observed [20]. In our simulations, in order to mitigate the effect of white timing jitter, we have assumed that σj² = .…”

Section: Fig 7: Correlation Dependency On Modulation Index δmentioning

confidence: 99%

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MM-wave LTE-A small-cell wireless backhauling based on TH-IR techniques

Rahman

Sacchi

Stallo

2015

2015 IEEE Aerospace Conference

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The backhauling will be one of the key issues for future wireless networking in the framework of LTE-A (Long Term Evolution-Advanced) standardization. 3GPP (3rd Generation Partnership Project) standardization committee has decided to study different alternative solutions for small cell backhauling, considering also broadband wireless solutions based on MM-wave Point-to-Point (P-t-P) and Point-to-multiPoint (P-t-mP) transmissions. Currently, E-band (81-86 GHz) is preferred for LOS backhauling, while the 28 GHz band has been intensively studied for NLOS (Not Line of Sight) backhauling. In this paper, we aim at proposing feasible and effective solutions for LOS small-cell wireless backhaul based on UWB (Ultra Wide Band) Time-Hopping Impulse Radio (TH-IR) techniques in E-band. The motivation of the choice of TH-IR lies in the robustness of such kind of signals and in ease of generation and detection. The intrinsically lowspectral efficiency is compensated by the possibility of spanning the transmitted signal over the entire available bandwidth, keeping the power spectral density as low as required. Typical channel impairments affecting MM-wave transmission (nonlinear distortions, rain fading, oxygen absorption, phase noise, etc.) have been considered in our simulations. Results have shown the capability of TH-IR to reach a net capacity of 3.48 Gb/s at a distance superior to 1 Km in a point-to-multipoint 4-to-1 backhaul configuration.

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On the optimum pulse-position modulation index for ultra-wideband communication

Cited by 7 publications

References 10 publications

A Pulse Shape Design Method for Ultra-Wideband Communications

A Pulse Shape Design Method for Ultra-Wideband Communications

Link Energy Minimization in IR-UWB Based Wireless Networks

MM-wave LTE-A small-cell wireless backhauling based on TH-IR techniques

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