Optimal and suboptimal receivers for ultra-wideband transmitted reference systems

2009 IEEE International Conference on Ultra-Wideband

et al. 2009

In this paper, we analyze the performance of a particular class of Transmitted-Reference (TR) receiver for Impulse Radio (IR) Ultra Wide Band (UWB) communication systems, which is called Chip-Time Differential TransmittedReference (Tc-DTR). The analysis aims at investigating the performance of this receiver in the presence of faded narrowband interference, and at comparing it with other TR receiver schemes proposed in the literature. It is shown that Tc-DTR receivers can offer a substantial performance gain with respect to other non-coherent receiver architectures, provided that some optimization conditions on code design are satisfied. Guidelines for optimal code and system optimization to reject narrow-band interference are provided in the present manuscript, as well as their effect on system performance. Numerical simulations are also shown to substantiate findings and analytical derivations.

Section: A Computation Of (Signal+interference)-to-noise Ratio -(S+i)nrmentioning

confidence: 99%

On the robustness of T<inf>C</inf>-DTR UWB receivers to narrow-band interference: Performance analysis and guidelines for system optimization

2009 IEEE International Conference on Ultra-Wideband

et al. 2009

“…which is obtained by following the same approach as in [29] and [71] but including DS coding and NBI. See also Appendix I for further information.…”

Section: A Framework To Compute the Abepmentioning

confidence: 99%

“…By using arguments similar to [5], [29], [71], the following identities and approximations can be proved after lengthly algebraic manipulations: ⎧ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎨ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎩…”

Section: Appendix I Computationmentioning

confidence: 99%

Performance Analysis and Optimization of $\hbox{T}_{\rm c}$-DTR IR-UWB Receivers Over Multipath Fading Channels With Tone Interference

IEEE Trans. Veh. Technol.

et al. 2011

In this paper, we analyze the performance of a particular class of Transmitted-Reference (TR) receivers for Impulse Radio (IR-) Ultra Wide Band (UWB) communication systems, which is called Chip-Time Differential Transmitted-Reference (Tc-DTR). The analysis aims at investigating the robustness of this receiver to single-and multi-tone Narrow-Band Interference (NBI), and at comparing its performance with other non-coherent receivers proposed in the literature. It is shown that the Tc-DTR scheme provides more degrees of freedom for performance optimization, and it is inherently more robust to NBI than other non-coherent receivers. More specifically, it is analytically proved that the performance improvement is due to the chip-time level differential encoding/decoding of the Direct Sequence (DS) code, and to an adequate design of DS code and average pulse repetition time. The analysis encompasses performance metrics that are useful for both data detection (i.e., Average Bit Error Probability, ABEP) and timing acquisition (i.e., False Alarm Probability, P fa , and Detection Probability, P d). Moving from the proposed semi-analytical framework, the optimal code design and system parameters are derived, and it is highlighted that the same optimization criterion can be applied to all performance metrics considered in this paper. Also, analytical frameworks and theoretical findings are substantiated via Monte Carlo simulations. Index Terms-Ultra wide band (UWB), impulse radio (IR), transmitted-reference (TR), tone interference, multipath fading channels, code design, performance analysis. I. INTRODUCTION T RANSMITTED-REFERENCE (TR) signaling schemes in conjunction with auto-correlation receiver architectures are well-known techniques to transmit and receive data over unknown fading channels (see, e.g.

“…which is obtained by following the same approach as in [10] and [32] but including DS coding and NBI.…”

Section: R-r-mentioning

confidence: 99%

Detection and false alarm probabilities of IR-UWB Chip-Time Differential Transmitted-Reference receivers: A framework for performance analysis and optimization over multipath fading channels with tone interference

MILCOM 2009 - 2009 IEEE Military Communications Conference

et al. 2009

In this paper, we will propose a framework for computing Detection (Pd) and False Alarm (Pfa) Probabilities for Chip-Time Differential Transmitted-Reference (Tc-DTR) receivers over frequency-selective multipath fading channels further impaired by Narrow-Band Interference (NBI). We will show that, when compared to similar non-coherent receiver architectures, T c-DTR offers an intrinsic robustness to NBI, provided that the Direct Sequence (DS) signature code is adequately designed to minimize the effect of interference. We will point out that, among various non-coherent receiver schemes, the property of almost completely rejecting NBI via a proper code design is unique to T c-DTR with DS coding. Guidelines for optimal code and system optimization will also be provided in the present manuscript. Numerical simulations will be shown to substantiate findings and analytical derivations.