The comparison of time division multiple access (TDMA) (global system for mobile communication, GSM) and wideband-code division multiple access (W-CDMA) (third generation, 3G) system based on their modulation techniques

CDMA is the abbreviation of Code Division Multiple Access which is a kind of new and mature wireless communication technology. The CDMA system Used in 3G mobile communication is simulated using the MATLAB software here. A CDMA2000 base station transmitter is established using the Simulink tools. Each module is initialized in order to achieve the simulation of a base station transmitter of the cdma2000. The whole process of producing singals is simulated by the fundamental reverse channel. The simulation results are compared with theoretical conclusion, proving that the simulation method is very effective.

Download Full-text

Implementing a Power Efficient PN Sequence Generator Using Spintronic Devices for Code Division Multiple Access Based Wireless Mobile Communication

Journal of Computational and Theoretical Nanoscience ◽

10.1166/jctn.2008.2571 ◽

2008 ◽

Vol 5 (7) ◽

pp. 1334-1339

Author(s):

Subir Kumar Sarkar ◽

Ankush Ghosh ◽

Anindya Ghosh ◽

K. Senthil Kumar ◽

T. Datta

Keyword(s):

Mobile Communication ◽

Code Division Multiple Access ◽

Multiple Access ◽

Pn Sequence ◽

Power Efficient ◽

Spintronic Devices ◽

Wireless Mobile Communication ◽

Code Division Multiple ◽

Sequence Generator ◽

Wireless Mobile

Download Full-text

The Design and Application of UAV’s Digital Steering Gear

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.181-182.998 ◽

2011 ◽

Vol 181-182 ◽

pp. 998-1005

Author(s):

Shi Jun Xu ◽

Yong Hong Hu ◽

Wei Wan

Keyword(s):

Code Division Multiple Access ◽

Multiple Access ◽

Computer Control ◽

Normal Operation ◽

Electromagnetic Environment ◽

Aerial Vehicle ◽

Working Principle ◽

Environmental Requirements ◽

Code Division Multiple ◽

Time Division

For a special electromagnetic environment and the installation of environmental requirements of UAV (unmanned aerial vehicle) airborne, a design of digital anti-jamming steering gear is given. The composition, functions and working principle of the steering gear are described in details. The key circuits of functional modules are given, introduce a CDMA (code division multiple access) communication protocol of Digital Servo instruction and TDMA (time division multiple access) state data frame format. Take a UAV as an example, discusses the multi-steering application in airborne systems workflow. The application results showed that: this design not only improves the steering anti-jamming capability, ensures that the steering gear in the normal operation of complex electromagnetic environment, but also greatly reduces the UAV onboard computer control interfaces, improves flexibility and reliability.

Download Full-text

Link budget comparison of different mobile communication systems based on EIRP and EISL

Advances in Radio Science ◽

10.5194/ars-2-127-2004 ◽

2005 ◽

Vol 2 ◽

pp. 127-133 ◽

Cited By ~ 1

Author(s):

G. Fischer ◽

F. Pivit ◽

W. Wiebeck

Keyword(s):

Mobile Communication ◽

Communication Systems ◽

Multiple Access ◽

Mobile Communication Systems ◽

Air Interface ◽

Sensitivity Level ◽

Link Budget ◽

Code Division Multiple ◽

Time Division ◽

Effective Sensitivity

Abstract. The metric EISL (Equivalent Isotropic Sensitivity Level) describing the effective sensitivity level usable at the air interface of a mobile or a basestation is used to compare mobile communication systems either based on time division or code division multiple access in terms of coverage and emission characteristics. It turns out that systems that organize the multiple access by different codes rather than different timeslots run at less emission and offer greater coverage.

Download Full-text