High-resolution range estimation technique using shift invariant TOA estimation algorithm for indoor localization of chirp spread spectrum system

Li, Yingchun; Chong, Jong‐Wha

doi:10.1109/icnidc.2012.6418818

Cited by 2 publications

(2 citation statements)

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“…where α is the gain of the amplifier and s T (t) is the transmitted signal. Considering the attenuation (β), phase shift (φ) and delay (τ) due to the path, the received signal will be as (2). It must be noted that the phase is a function of scattered field from a target and since in this paper the target is a simple object (metallic sheet), its frequency response has been considered to be flat and this is the reason for using a constant phase in the formulation (assuming that the ray tracing method is applicable in the corresponding bandwidth)…”

Section: Design Of M-sequence Radarmentioning

confidence: 99%

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High‐resolution range estimation using time delays in ultra‐wideband M‐sequence radar

Fereidoony

Mirtaheri

Chamaani

2017

IET Microwaves, Antennas & Propagation

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Getting a high range resolution is an important issue in many research areas and applications especially for narrowband system. Although wideband systems have a better condition from this viewpoint, they have additional challenges in terms of cost and RF manufacturing. Thus, overcoming the bandwidth constraint on the resolution can be a game changer in the simplicity and feasibility aspects of a system. In this paper, an accurate and efficient approach for high resolution range measurement is proposed. An ultra‐wideband (UWB) M‐sequence system is established for its simplicity and cost effectiveness compared to other methods like frequency modulated continuous wave (FMCW) and impulse technique. However, the limited usable bandwidth in the power spectrum of an M‐sequence signal degrades its resolution. We have alleviated this shortcoming by applying a Least squares (LS) estimator to improve the resolution and accuracy of the system. The acceptable performance of the presented method is verified experimentally and numerically by achieving 45% improvement in the resolution with the accuracy of more than 95%. By considering the effects of different parameters such as response of antenna, method of scan and systematic errors, the proposed method would be a good candidate for remote sensing applications.

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Section: Design Of M-sequence Radarmentioning

confidence: 99%

“…Traditional and mostly expensive high-resolution range estimation has been widely investigated in many research areas such as radar, navigation, localisation and tracking [1,2]. However, for newer generations of sensing systems, simplicity and lower cost should be preserved, too.…”

Section: Introductionmentioning

confidence: 99%