Flexible Spectrum Control and Receiver Performance Improvement Technologies for B3G Wireless Systems

2006 ◽  
Author(s):  
Seiichi Sampei ◽  
Shinsuke Ibi
Keyword(s):  
Performance Improvement ◽  
Wireless Systems ◽  
Receiver Performance ◽  
Spectrum Control

Laser Radar Receiver Performance Improvement by Inter Symbol Interference

2012 ◽  
Vol E95.B (8) ◽  
pp. 2631-2637 ◽  
Author(s):  
Xuesong MAO ◽  
Daisuke INOUE ◽  
Hiroyuki MATSUBARA ◽  
Manabu KAGAMI
Keyword(s):  
Performance Improvement ◽  
Laser Radar ◽  
Receiver Performance ◽  
Inter Symbol Interference

scholarly journals Wlan Performance Improvement by Header Compression and Packet Overhearing Reduction

2014 ◽  
Vol 65 (4) ◽  
pp. 203-212
Author(s):  
David Levy ◽  
Ivan Kotuliak ◽  
Peter Trúchly
Keyword(s):  
Power Consumption ◽  
Performance Improvement ◽  
Wireless Systems ◽  
Wireless Devices ◽  
Vital Importance ◽  
Performance Improvements ◽  
Header Compression ◽  
Radio Resources ◽  
Normalized Throughput ◽  
Simulation Results

Abstract For wireless systems, it is of vital importance to use the scarce radio resources in an efficient way. The main targets are to reduce the power consumption and increase the throughput of wireless devices. Using header compression both throughput can be increased and power can be saved. Using packet overhearing reduction power can be saved. This paper presents the achieved performance improvements when using these two methods. The simulation results are confirmed by analytical calculations. We show that we can achieve up to 35% power save when combining both methods and close to 0.1 additional normalized throughput.

scholarly journals Signal processing for transmitted-reference ultra wideband system

2021 ◽  
Author(s):  
Alston L. Emmanuel ◽  
Xavier N. Fernando
Keyword(s):  
Wavelet Analysis ◽  
Performance Improvement ◽  
System Performance ◽  
Channel Model ◽  
Wireless Systems ◽  
Ultra Wideband ◽  
Ieee 802.11A ◽  
Transmitted Reference ◽  
Receiver Architecture ◽  
Notch Filtering

This thesis focuses on transmitted-reference ultra wideband (TR-UWB) systems coexistence with IEEE802.11a WLAN systems. TR-UWB systems can relax the difficult synchronization requirements and can provide a simple receiver architecture that gathers the energy from many resolvable multipath components. However, UWB TR systems are susceptible to interference which comes from other wireless systems. In this thesis, TR-UWB system performance is studied in the presence of strong IEEE 802.11a WLAN interference in both AWGN and IEEE channel model. In order to reduce both the effects of interference by and into UWB signals, we propose a new method in conjunction with a multi-carrier type transmission pulse using wavelet analysis and notch filtering. Using wavelet analysis, spectral density of the transmitted UWB signal around the interfering band is reduced by 60 dB lower than the peak. With the modified TR-UWB receiver, the TR-UWB system shows performance improvement in the presence of strong IEEE 8-2.11a interference in both AWGN and IEEE channel models. The proposed method can be used for the coexistence of different wireless systems with UWB system.

scholarly journals Performance Improvement of MIMO-OFDM Wireless Systems using PAPR Reduction Techniques

2012 ◽  
Vol 53 (18) ◽  
pp. 7-12
Author(s):  
Gamal MabroukAbdel-Hamid ◽  
Sahar Abdel-Rahman ◽  
Hala Gaber Farrag
Keyword(s):  
Performance Improvement ◽  
Wireless Systems ◽  
Papr Reduction ◽  
Reduction Techniques ◽  
Mimo Ofdm

scholarly journals Nonlinear correlation receiver performance in UWB radio system

2006 ◽  
Vol 16 (1) ◽  
pp. 17-19
Author(s):  
Nenad Milosevic ◽  
Bojan Dimitrijevic ◽  
Zorica Nikolic
Keyword(s):  
Performance Improvement ◽  
Adaptive Filter ◽  
Radio System ◽  
Nonlinear Correlation ◽  
Linear Receiver ◽  
Complex Adaptive ◽  
Correlation Receiver ◽  
Significant Performance ◽  
Receiver Performance ◽  
Uwb Radio

The rejection of QPSK interference in a THPPM UWB system using complex adaptive filter and a nonlinear correlation receiver (NCR) with a soft-limiter will be considered in this paper. This system brings a significant performance improvement compared to the system which uses complex adaptive filter and a linear receiver, particularly in the case of high interference power, where its absence leads to the reception loss.

scholarly journals Signal processing for transmitted-reference ultra wideband system

2021 ◽  
Author(s):  
Alston L. Emmanuel ◽  
Xavier N. Fernando
Keyword(s):  
Wavelet Analysis ◽  
Performance Improvement ◽  
System Performance ◽  
Channel Model ◽  
Wireless Systems ◽  
Ultra Wideband ◽  
Ieee 802.11A ◽  
Transmitted Reference ◽  
Receiver Architecture ◽  
Notch Filtering

This thesis focuses on transmitted-reference ultra wideband (TR-UWB) systems coexistence with IEEE802.11a WLAN systems. TR-UWB systems can relax the difficult synchronization requirements and can provide a simple receiver architecture that gathers the energy from many resolvable multipath components. However, UWB TR systems are susceptible to interference which comes from other wireless systems. In this thesis, TR-UWB system performance is studied in the presence of strong IEEE 802.11a WLAN interference in both AWGN and IEEE channel model. In order to reduce both the effects of interference by and into UWB signals, we propose a new method in conjunction with a multi-carrier type transmission pulse using wavelet analysis and notch filtering. Using wavelet analysis, spectral density of the transmitted UWB signal around the interfering band is reduced by 60 dB lower than the peak. With the modified TR-UWB receiver, the TR-UWB system shows performance improvement in the presence of strong IEEE 8-2.11a interference in both AWGN and IEEE channel models. The proposed method can be used for the coexistence of different wireless systems with UWB system.

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