PERFORMANCE ANALYSIS OF A NOVEL M-ARY CODE SELECTED DS-BPAM UWB COMMUNICATION SYSTEM

2006 ◽  
Vol 15 (03) ◽  
pp. 455-466 ◽  
Author(s):  
ZHIQUAN BAI ◽  
SHAOYI XU ◽  
WEIHUA ZHANG ◽  
KYUNGSUP KWAK
Keyword(s):  
Communication System ◽  
Signal To Noise Ratio ◽  
Pulse Amplitude ◽  
Ultra Wideband ◽  
Modulation Scheme ◽  
Direct Sequence ◽  
High Bit Rate ◽  
Modulation Level ◽  
Uwb Communication ◽  
Selection Of

A novel M-ary direct sequence ultra wideband (UWB) communication system based on the selection of the direct sequence code is studied in this paper. The proposed M-ary code selected direct sequence bipolar pulse amplitude modulation scheme can achieve high bit rate without increasing the system bandwidth or changing the pulse shape. With the increase of the modulation level M, the system bit error rate will be improved even at lower signal to noise ratio per bit. The exact bit error probability is derived over the AWGN channel and correlation receivers. Both Monte-Carlo simulation and the theoretical analysis prove the efficiency of this M-ary UWB system.

A Design of Multi-Band UHF Sensor for Partial Discharge Detection

2013 ◽  
Vol 394 ◽  
pp. 435-440 ◽  
Author(s):  
Bin Liu ◽  
Jing De An ◽  
Wei Dong Zhang ◽  
You Lin Xu
Keyword(s):  
Signal To Noise Ratio ◽  
Partial Discharge ◽  
High Sensitivity ◽  
Ultra Wideband ◽  
Detection Sensitivity ◽  
Surface Discharge ◽  
Communication Signals ◽  
Metallic Particles ◽  
Selection Of ◽  
Multi Band

The selection and design of the sensor is one of the key technologies for UHF PD detection. The UHF sensors popular used in PD detection and location in substation are partial discharge UHF sensor are usually ultra wideband antenna in the frequency range of 200 MHz to 1.5 GHz, which contains interference from communication signals. Accordingly, in order to improve the detection sensitivity and the signal-to-noise ratio, a kind of multi-band UHF narrowband sensor is proposed and designed in accordance with the principles of the loop antenna for PD detection. The proposed frequency resonant bands are set in the ranges of 480MHz-520MHz, 800MHz-850MHz and 1.1GHz-1.2GHz. The design based on simulation is finished and the performances of the prototype sensor are researched by parametric test and PD detection of three typical discharges: corona discharge, surface discharge and metallic particles discharge generated by PD mode. Results show that the selection of band for the UHF sensor is reasonable, and the sensor is with high sensitivity.

scholarly journals A FPGA implementation of GMM MUD algorithm for space formation aircraft communication system

2020 ◽  
Vol 309 ◽  
pp. 01004
Author(s):  
Bo Ma ◽  
Mingdong Xu ◽  
Zhilu Wu
Keyword(s):  
Communication System ◽  
Data Transfer ◽  
Transmission Rate ◽  
Gaussian Mixture ◽  
Detection Algorithm ◽  
Fpga Implementation ◽  
Ultra Wideband ◽  
Direct Sequence ◽  
High Data ◽  
Field Programmable

Space formation aircraft communication system needs to meet strong anti-interference ability, low power consumption and high transmission rate performance. Ultra-wideband (UWB) has high data transfer rate, low device complexity, high interference resistance and confidentiality. Therefore, UWB technology is used in space formation aircraft communication system, which is direct sequence ultra-wideband (DS-UWB) space formation aircraft communication system. This paper, we put forward a multi-user detection (MUD) algorithm based on Gaussian Mixture Model (GMM) in DS-UWB communication system and its field-programmable gate array (FPGA) implementation. We adopt a way which based on MATLAB and FPGA platform, and results show that MUD algorithm based on GMM has better bit error rate (BER) performance compared to classical multi-user detection algorithm.

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