A New Anti-blackout Communication Method Based on Carrier Aggregation of OFDMA and Frequency Diversity

2018 ◽  
pp. 351-360
Author(s):  
Jieqi Li ◽  
Xiaoya Zuo ◽  
Yong Zhang ◽  
Zhengxue Li ◽  
Shaohui Mei ◽  
...  
Keyword(s):  
Carrier Aggregation ◽  
Frequency Diversity ◽  
Communication Method

Performance Evaluation of LTE-Advanced Heterogeneous Network Deployment Using Carrier Aggregation between Macro and Small Cells

2013 ◽  
Vol E96.B (6) ◽  
pp. 1297-1305
Author(s):  
Takahiro TAKIGUCHI ◽  
Kohei KIYOSHIMA ◽  
Yuta SAGAE ◽  
Kengo YAGYU ◽  
Hiroyuki ATARASHI ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Heterogeneous Network ◽  
Small Cells ◽  
Carrier Aggregation ◽  
Lte Advanced

Experiments on Asymmetric Carrier Aggregation Associated with Control Signaling Reception Quality in LTE-Advanced

2013 ◽  
Vol E96.A (11) ◽  
pp. 2106-2113
Author(s):  
Keisuke SAITO ◽  
Yuichi KAKISHIMA ◽  
Teruo KAWAMURA ◽  
Yoshihisa KISHIYAMA ◽  
Hidekazu TAOKA ◽  
...  
Keyword(s):  
Carrier Aggregation ◽  
Lte Advanced

Improving Space-Time-Frequency MIMO-OFDM with ICI Self-Cancellation Scheme using Least Square Error Estimator

2015 ◽  
Vol 12 (1) ◽  
pp. 25
Author(s):  
Nur Farahiah Ibrahim ◽  
Zahari Abu Bakar ◽  
Azlina Idris
Keyword(s):  
Channel Estimation ◽  
Orthogonal Frequency Division Multiplexing ◽  
Symbol Error Rate ◽  
Space Time ◽  
Least Square ◽  
Error Estimator ◽  
Frequency Diversity ◽  
Time Frequency ◽  
Mimo Ofdm ◽  
Subcarrier Mapping

Channel estimation techniques for Multiple-input Multiple-output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) based on comb type pilot arrangement with least-square error (LSE) estimator was investigated with space-time-frequency (STF) diversity implementation. The frequency offset in OFDM effected its performance. This was mitigated with the implementation of the presented inter-carrier interference self-cancellation (ICI-SC) techniques and different space-time subcarrier mapping. STF block coding in the system exploits the spatial, temporal and frequency diversity to improve performance. Estimated channel was fed into a decoder which combined the STF decoding together with the estimated channel coefficients using LSE estimator for equalization. The performance of the system was compared by measuring the symbol error rate with a PSK-16 and PSK-32. The results show that subcarrier mapping together with ICI-SC were able to increase the system performance. Introduction of channel estimation was also able to estimate the channel coefficient at only 5dB difference with a perfectly known channel.

CREATIVITY OF URBANONYMS AS A FORM OF MODERN URBAN FOLK CULTURE (ON THE EXAMPLE OF VELIKY NOVGOROD)

2020 ◽  
pp. 139-144
Author(s):  
E.O. Orlova
Keyword(s):  
Folk Culture ◽  
Image Characteristics ◽  
Communication Method

The author reveals the understanding of the nomination of urban microtoponyms as a communication method within the community: preservation and transfer of culturally significant meanings. The signs of creativity are shown in Veliky Novgorod urbanonyms: deviation from stereotypes, overcoming schemes and a combination of associative elements. The use of words-images expressiveness is shown as a leading feature of Novgorod microtoponymics. The article describes the word-image characteristics which are the basis of urbanonyms.

The application of WeChat App with “group function” in emergency management and treatment of COVID-19 (Preprint)

2020 ◽  
Author(s):  
Jing Liu ◽  
Hong Shan ◽  
Changli Tu ◽  
Meizhu Chen ◽  
Xiujuan Qu ◽  
...  
Keyword(s):  
Public Health ◽  
Group Communication ◽  
Public Health Emergency ◽  
Diagnosis And Treatment ◽  
Labor Costs ◽  
Wuhan City ◽  
Group Function ◽  
The Public ◽  
Communication Method ◽  
Tertiary Hospitals

UNSTRUCTURED Background: Since December 2019, Coronavirus Disease 2019 (COVID-19) emerged in Wuhan city and rapidly spread throughout China. Facing this kind of public health emergency, an efficient, fast and group communication method is needed. Method: As a director of the department Pulmonary and Critical Care Medicine in a tertiary hospitals, which is the only designated one for diagnosis and treatment of COVID-19 in a medium-sized city, I analyzed and summarized the “group function” of WeChat (Weixin, micro-message) App in working about COVID-19. Results: By February 16, 2020, we have completed 1,526 citywide consultations and treatment of 322 inpatients, including 97 patients diagnosed with COVID-19, with the help of 12 WeChat groups by handy. The advantages of WeChat group are as follows: 1. Work efficiency can be improved greatly, saving labor costs. 2. Accurate and intuitive information can be gotten fast and timely, avoiding close contacting with COVID-19 patients. 3. Data and message in WeChat groups can be saved, arranged and reviewed at any time. Conclusions: The “group function” in WeChat App plays a greater role in the public health emergent work about management, diagnosis and treatment of COVID-19.

Sign in / Sign up

Export Citation Format

Share Document