Results 251 to 260 of about 7,611,580 (295)

Space time transmit site diversity for OFDM multi base station system

4th International Workshop on Mobile and Wireless Communications Network, 2003
In a single frequency network (SFN) using OFDM, the signals from plural base stations cannot be combined coherently at the receiver and large diversity gain cannot be achieved. We consider a system using space time transmit diversity (STTD) for site diversity between base stations.
Manabu Inoue, Masao Nakagawa, Takeo Fujii   +2 more
openaire   +2 more sources

Error Analysis Based on Multi-Base Station Network VRS Technology

Advanced Materials Research, 2011
The existing problems of conventional RTK in actual applications specifically show that the difference technology can only eliminate the public error between base station and subscriber station under certain conditions, with the increases of baseline length (more than 20 km), the correlation of errors between tropospheric and ionospheric weakened or ...
Hong He, Hai Ping Fang, Hang Li, Da Jian Zhang, Ming Feng Hou   +4 more
openaire   +1 more source

Distributed estimation of sparse user activity for multi-base station on-off random access

2015 IEEE International Conference on Communication Workshop (ICCW), 2015
We consider user activity estimation for on-off random access in multi-base station systems. With on-off random access, each user, at a fixed slot, transmits its unique codeword (and is hence active) with probability p, and is heard by all base stations in its vicinity; the goal for each base station is then to determine which of the users in its ...
Dusan Jakovetic, Dragana Bajovic, Dejan Vukobratovic   +2 more
openaire   +1 more source

DOA Estimation and Localization Using Multi-Base Station Spatial Spectrum Fusion

ION GNSS+, The International Technical Meeting of the Satellite Division of The Institute of Navigation, 2017
From retail shopping, emergency services, location based services to disaster recovery accurate location technology will be prime localization experience. GPS assisted system for accurate location are available for outdoor, but indoors, where GPS fades, and presence of multipath, non-line-of-sight, and scattering environment yields unreliable position ...
Madhu Kumari Choudhary, Di He, Lav Dutta, Fei Wen, Peilin Liu, Wenxian Yu, Yi Zhang   +6 more
openaire   +1 more source

Multi-base Station Energy Cooperation Based on Nash Q-Learning Algorithm

2017
In view of the current energy problems of communication base station, a multi-base station energy cooperation strategy is proposed to reduce the energy consumption of power grid, which is introducing renewable energy and energy cooperation between the base station based on the Nash-Q learning algorithm.
Yabo Lv, Baogang Li, Wei Zhao 0021, Dandan Guo, Yuanbin Yao   +4 more
openaire   +2 more sources

A Multi-base Station Cooperative Algorithm for LDPC-OFDM System in the HF Channel

2014 International Conference on Wireless Communication and Sensor Network, 2014
Based on LDPC-OFDM system, a multi-base station cooperative algorithm is designed for high frequency (HF) channel, and a LDPC cooperative decoding algorithm is proposed, which adopts information combining strategy based on the probability measure. The center station in the system model uses the multiple signals received from the relay stations to ...
Xiao-Bei Li, Song Zhang, Fei-Hu Zhao, Hai-Wei Zhang   +3 more
openaire   +1 more source

VRS technology based on multi-base station network and its error analysis

2009 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA 2009), 2009
The existing problems of conventional RTK in actual applications specifically indicate that the difference technology can only eliminate the public error between base station and subscriber station under certain conditions. With the increases of baseline length (more than 20 km), the correlation of errors between tropospheric and ionospheric weakens or
null Hong He, null Hao Liu, null Da-Jian Zhang, null Bao-Feng Zhang, null Yong Tian, null Ke-Xi Wang, null Hui Meng, null Ming-Feng Hou   +7 more
openaire   +1 more source

Performance approximation of a multi-base station slotted ALOHA for wireless LAN's

IEEE Transactions on Vehicular Technology, 1992
It has been reported that the capture effect can improve the performance of slotted ALOHA systems. Further improvement can be expected when the number of base stations is increased. The performance of such slotted ALOHA systems with multiple base stations is analyzed with the aid of the equilibrium point analysis.
openaire   +1 more source

Indoor multi-base stations system with simultaneous transmission using OFDM adaptive array antenna

11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525), 2002
We propose to set an OFDM adaptive array on a mobile terminal in order to collect the signals received from multi-base stations efficiently in an indoor wireless system. By doing so, the system will obtain some diversity gain when the received signals contain the same data.
Takeo Fujii, Masao Nakagawa
openaire   +1 more source

Multi-Base-Station UWB Time Difference Positioning System

2021 International Conference on Microwave and Millimeter Wave Technology (ICMMT), 2021
Qiu Liyuan, Li Bo, Zhao Sijie, Wang Hao
openaire   +1 more source