Real-Time Dispersion Code Multiple Access for High-Speed Wireless Communications

Zou, Lianfeng; Gupta, Shulabh; Caloz, Christophe

doi:10.1109/twc.2017.2765304

Cited by 13 publications

(9 citation statements)

References 38 publications

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“…Following [12], we choose odd Chebyshev dispersion coding [τ U m pωq] for AP U m , @ m, corresponding to…”

Section: A Modulation and Codingmentioning

confidence: 99%

“…A phaser is an analog processor that ideally provides a flat magnitude response and an application-specific group delay response. R-ASP applications include spectrum analysis [3], spectrum sniffing [4], time-stretching based sampling enhancement [5]- [7], time reversal [8], chipless RFID [9], communication SNR enhancement [10] and dispersion code multiple access (DCMA) wireless communication [11], [12].…”

Section: Introductionmentioning

confidence: 99%

“…DCMA wireless communication is a promising R-ASP technology, where each access point is assigned a distinct dispersion code, or a specified group delay function provided by a phaser, for multiple access with low transceiver complexity and negligible processing latency following from the analog nature of R-ASP [12]. However, DCMA systems reported to date can only route signals between fixed communication pairs.…”

Section: Introductionmentioning

confidence: 99%

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Time-Reversal Routing for Dispersion Code Multiple Access (DCMA) Communications

Zou

Caloz

2017

Preprint

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We present the modeling and characterization of a time-reversal routing dispersion code multiple access (TR-DCMA) system. We show that this system maintains the low complexity advantage of DCMA transceivers while offering dynamic adaptivity for practial communication scenarios. We first derive the mathematical model and explain operation principles of the system, and then characterize its interference, signal to interference ratio, and bit error probability characteristics.

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“…Following [12], we choose odd Chebyshev dispersion coding [τ U m pωq] for AP U m , @ m, corresponding to…”

Section: A Modulation and Codingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Time-Reversal Routing for Dispersion Code Multiple Access (DCMA) Communications

Zou

Caloz

2017

Preprint

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“…This technology has recently been introduced as a potential high-speed and lowlatency alternative to dominantly digital technologies, given its unique features of real-time operation, low-power consumption and low-cost production [1]. RAP phasers have been realized in different architectures, including C-sections and D-sections [2]- [6], coupled resonators [7], [8], nonuniform delay lines [9], [10], metamaterial transmission-line structures [11], loss-gain pairs [12], and RAP has been demonstrated in several applications, including compressive receiving [11], real-time spectrum analysis [13], [14], realtime spectrum sniffing [15], [16], Hilbert transformation [17], SNR enhanced impulse radio transceiving [18], dispersion code multiple access (DCMA) [19], signal encryption [20], radio-frequency identication [21] and scanning-rate control in antenna arrays [22].…”

Section: Introductionmentioning

confidence: 99%

Microwave Hilbert Transformer and Its Applications in Real-Time Analog Processing

Wang

Deck-Léger

Zou

et al. 2019

IEEE Trans. Microwave Theory Techn.

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A microwave Hilbert transformer is introduced as a new component for Real-time Analog Processing (RAP). In contrast to its optical counterpart, that resort to optical fiber gratings, this Hilbert transformer is based on the combination of a branch-line coupler and a loop resonator. The transfer function of the transformer is derived using signal flow graphs, and two figures of merits are introduced to effectively characterize the device: the rotated phase and the transition bandwidth. Moreover, a detailed physical explanation of its physical operation is given, using both a steady-state regime perspective and a transient regime perspective. The microwave RAP Hilbert transformer is demonstrated experimentally, and demonstrated in three applications: edge detection, peak suppression and single sideband modulation.

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“…• Using the phaser to implement RTFT analog devices for real-time analysis of impulse signals [110] and real-time dispersion code multiple access (DCMA) [111] [112] for 5G applications.…”

Section: Active Phasers For Analog Signal Processing Applicationsmentioning

confidence: 99%

Dispersion Engineered Radiative & Guided-Wave Electromagnetic Structures for Efficient Wave Control

Emara¹

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Dispersion engineering is the process of controlling the phase response of an electromagnetic (EM) structure as a function of frequency, which in turn determines the propagation characteristics of EM waves in the structure. This thesis presents two novel dispersion engineered structures for controlling the propagation properties of EM waves for two different applications. The first structure is a low-profile dielectric choke ring for multipath mitigation for global navigation satellite systems (GNSS) applications. The proposed structure has a dual-band surface impedance resonance and it is designed by engineering the surface impedance to strategically introduce two resonant frequencies around the GNSS bands of L2 (1227.60 MHz) and L1 (1575.42 MHz). This provides capacitive surface impedances around both bands simultaneously, required for efficient surface wave suppression for higher multipath rejection performance. To demonstrate the proposed principle of surface impedance engineering, an in-house choke ring prototype of the proposed design is tested with the widely used Dorne & Margolin (DM) antenna on top of it. A high multipath rejection in both GNSS bands is experimentally confirmed with comparable performances to an otherwise bulky, heavy, and expensive conventional metallic choke ring. The proposed design further provides 58% reduction in height and 26% reduction in diameter using a low-cost FR4 dielectric material. The second structure is an amplitude-equalized group delay device, called a phaser, for analog signal processing (ASP) applications, implemented at microwave and millimeter-wave (mm-wave) frequencies. The proposed devices achieve a flat magnitude transmission while preserving their strong dispersive group delay response. The microwave phaser is realized using C-sections, and the mm-wave phaser is realized using micro-ring resonators implemented using half-mode substrate integrated waveguide (HMSIW) structures. Both types of phasers are successfully demonstrated using full-wave simulations, with experimental demonstration currently underway for the active configurations.ii

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Real-Time Dispersion Code Multiple Access for High-Speed Wireless Communications

Cited by 13 publications

References 38 publications

Time-Reversal Routing for Dispersion Code Multiple Access (DCMA) Communications

Time-Reversal Routing for Dispersion Code Multiple Access (DCMA) Communications

Microwave Hilbert Transformer and Its Applications in Real-Time Analog Processing

Dispersion Engineered Radiative & Guided-Wave Electromagnetic Structures for Efficient Wave Control

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