Sökning: "trilateration"

Visar resultat 16 - 20 av 38 uppsatser innehållade ordet trilateration.

1. 16. Cost-Effective Positioning based on WiFi-Probes: A Quantitative Study : Deriving the Position of a Smartphone using the Signal Strength of WiFi-Probes

   Kandidat-uppsats, Blekinge Tekniska Högskola/Institutionen för datalogi och datorsystemteknik

   Författare :Alexander Ljung; Hannes Knutsson; [2018]
   Nyckelord :WiFi; Probe Broadcast; Local Positioning System; Trilateration; RSSI;

   Sammanfattning : In the modern society, almost everyone has a smartphone. These devices tend to almost always use WiFi-networking. For the device to identify nearby WiFi access points it has to send out WiFi probing broadcasts. Nearby access points respond to these broadcasts in order to let the device know that they are within reach. LÄS MER

3. 17. Performance Comparison of Localization Algorithms for UWB Measurements with Closely Spaced Anchors

   Master-uppsats, Luleå tekniska universitet/Rymdteknik

   Författare :Max Nilsson; [2018]
   Nyckelord :Trilateration; Linear Least Squares; Weighted Block Newton; Kalman Filter; Indoor Positioning System;

   Sammanfattning : Tracking objects or people in an indoor environment has a wide variety of uses in many different areas, similarly to positioning systems outdoors. Indoor positioning systems operate in a very different environment however, having to deal with obstructions while also having high accuracy. LÄS MER

4. 18. A Combination method of Fingerprint Positioning and Propagation Model Based localization scheme in 3D Large-Scale Indoor Space

   Master-uppsats, Mittuniversitetet/Avdelningen för informationssystem och -teknologi

   Författare :Jun Liu; [2018]
   Nyckelord :;

   Sammanfattning : To achieve the concrete aim of improving the positioning accuracy for large-scale indoor space in this thesis, we propose a weighted Gaussian and Mean hybrid filter (G-M filter) to obtain the G-M mean of received signal strength indicator (RSSI) measurements, which is implemented by taking the practically experimental measurements of received signal strength indicator and analyzing the characteristics of received signal strength indicator. Meanwhile, various path loss models have been utilized to estimate the separation between the transmitting antenna and the receiver (T-R separation) by calculating the G-M mean of received signal strength indicator, therefore, a dynamic-parameter path loss model has been proposed which can be appropriate to enhance the accuracy of estimated T-R separation and accurately describe the indoor position. LÄS MER

5. 19. User Configurable Indoor Positioning System using WiFi Trilateration and Fingerprinting

   Kandidat-uppsats, Uppsala universitet/Institutionen för informationsteknologi

   Författare :Anton Carlsson; Filip Gölander; Fredrik Sandelin; [2017]
   Nyckelord :wifi; trilateration; fingerprinting; rssi; indoor positioning; positioning system; Indoor localization;

   Sammanfattning : The use of smartphones for positioning and navigation is mostly limited to outdoor settings. Indoors, where GPS signals are too inaccurate for positioning, an alternative must be used. LÄS MER

7. 20. Evaluating Off-the-shelf Hardware for Indoor Positioning

   Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

   Författare :Yaqin Chen; [2017]
   Nyckelord :Indoor positioning; UWB; WIFi; BLE; TOF; RSS; Technology and Engineering;

   Sammanfattning : An indoor positioning system (IPS) is a system to locate objects in indoor environments using radio waves, magnetic fields, acoustic, optical and video signals or other sensory information with help of a number of known reference positions. Nowadays, indoor positioning based services are used in a wide variety of areas and indoor positioning is getting considerable attention from both research and industry. LÄS MER