Cell search time performance using PVS transmit diversity in heterogeneous networks with the same frequency spectrum

2015 ◽  
Author(s):  
Naoki Noguchi ◽  
Mamoru Sawahashi ◽  
Satoshi Nagata
Keyword(s):  
Frequency Spectrum ◽  
Heterogeneous Networks ◽  
Search Time ◽  
Transmit Diversity ◽  
Cell Search ◽  
Time Performance

Effects of Display Failures and Symbol Rotation on Visual Search Using Dot-Matrix Symbols

1988 ◽  
Vol 32 (19) ◽  
pp. 1386-1390
Author(s):  
Jennie J. Decker ◽  
Craig J. Dye ◽  
Ko Kurokawa ◽  
Charles J. C. Lloyd
Keyword(s):  
Visual Search ◽  
Failure Mode ◽  
Rotation Angle ◽  
Search Time ◽  
Vertical Line ◽  
Horizontal Line ◽  
Search Performance ◽  
Display Design ◽  
Time Performance

This study was conducted to investigate the effects of display failures and rotation of dot-matrix symbols on visual search performance. The type of display failure (cell, horizontal line, vertical line), failure mode (ON, failures matched the symbols; OFF, failures matched the background), percentage of failures (0, 1, 2, 3, 4%), and rotation angle (0, 70, 105 degrees) were the variables examined. Results showed that displays which exhibit ON cell failures greater than 1% significantly affect search time performance. Cell failures degrade performance more than line failures. Search time and accuracy were best when symbols were oriented upright. The effects of display failures and rotation angle were found to be independent. Implications for display design and suggestions for quantifying the distortion due to rotation are discussed.

Design and Implementation of Cell Search Time Synchronization in LTE System Based on FPGA

2013 ◽  
Vol 380-384 ◽  
pp. 4076-4079
Author(s):  
De Min Zhang ◽  
Xiang Zhu ◽  
Zhi Hui Qiu ◽  
Chao Bo Duan
Keyword(s):  
Time Synchronization ◽  
Search Time ◽  
Physical Layer ◽  
Timing Synchronization ◽  
Frame Synchronization ◽  
Cell Search ◽  
Symbol Timing ◽  
Symbol Timing Synchronization ◽  
A Cell

LTE is accepted worldwide as the Long Term Evolution Perspective for todays 3G and 4G networks. Cell search time synchronization is an important physical layer procedure by which a user equipment (UE) acquires synchronization with a cell and detects the physical layer cell ID of that cell. Timing synchronization is consisted of the symbol timing synchronization and frame synchronization. This paper supplies the introduction of synchronization signals, presents the detection method, and analyzes the design based on FPGA platform and finally simulated on the Modelsim 6.5 and implemented in Xilinx Virtex-6 kit.

Cell Search Time Comparison Using Hierarchical and Non-hierarchical Synchronization Channels in OFDM Based Evolved UTRA Downlink

2009 ◽  
Vol E92-B (5) ◽  
pp. 1608-1618 ◽  
Author(s):  
Satoshi NAGATA ◽  
Motohiro TANNO ◽  
Yoshihisa KISHIYAMA ◽  
Kenichi HIGUCHI ◽  
Mamoru SAWAHASHI
Keyword(s):  
Search Time ◽  
Cell Search
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