scholarly journals A Joint Space-Time Array for Communication Signals-Based on a Moving Platform and Performance Analysis

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3388 ◽  
Author(s):  
Bin Yang ◽  
Cheng Wang ◽  
Bin Yang ◽  
Jiexin Yin
Keyword(s):  
Joint Space ◽  
Space Time ◽  
Communication Signals ◽  
Moving Platform ◽  
Simulation Results ◽  
And Performance ◽  
Array Aperture ◽  
Array Performance ◽  
Cramer Rao Bound ◽  
Source Number

A joint space-time array for communication signals is constructed in this paper to settle the contradiction between the performance of angle estimation and the array aperture. It introduces Doppler information caused by platform motion into the signal processing to obtain favorable performance with limited array aperture. We analyze the theoretical performance in the aspects of distinguishable source number, spatial resolution and Cramér-Rao bound (CRB), respectively. Both theoretical analysis and simulation results demonstrate that the proposed space-time array can give rise to a significant enhancement in achievable array performance.

The Scheme and Performance Analysis of Combined Beamforming with Space-Time Block Coding

2011 ◽  
Vol 30 (2) ◽  
pp. 408-411
Author(s):  
Min Li ◽  
Min Lin ◽  
Zheng-quan Gong ◽  
Run-lan Peng ◽  
De-xiang Li
Keyword(s):  
Performance Analysis ◽  
Space Time ◽  
Time Block ◽  
Block Coding ◽  
Space Time Block Coding ◽  
And Performance

A New Method of 6-DOF Serial Robot’s Trajectory Planning under Multi-Constraints

2014 ◽  
Vol 602-605 ◽  
pp. 1352-1357 ◽  
Author(s):  
Yong Ting Zhao ◽  
Bin Zheng ◽  
Hong Lin Ma
Keyword(s):  
Coordinate System ◽  
Trajectory Planning ◽  
Angular Displacement ◽  
Joint Space ◽  
New Method ◽  
Position Information ◽  
Physical Constraints ◽  
Dynamic Constraints ◽  
Quaternion Interpolation ◽  
And Performance

This paper proposes a new method of 6-DOF serial robot’s trajectory planning. Ensuring to satisfy the physical constraints of space conditions, the robot’s trajectory is interpolated in the Cartesian coordinate system, and using quaternion interpolation to solve the multiple solution problem in RPY interpolation. Meanwhile, the interpolated position information is transformed into the angular displacement information of the joint coordinate system, and the joint space trajectory planning is achieved using the genetic algorithms integrated velocity, acceleration, jerk and torque and other important kinematic and dynamic constraints. In robot safety and stability, the method is better than the general approach, and it has both the ideal trajectory parameters of the global search ability and performance planning.

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