Analysis on the Performance of Doppler Diversity Receiver with Different Combining Methods

2014 ◽  
Vol 11 (16) ◽  
pp. 5915-5926
Author(s):  
Yufeng Ma
Keyword(s):  
Doppler Diversity ◽  
Diversity Receiver ◽  
Combining Methods

Diversity Combining for Cooperative Communications

2010 ◽  
pp. 301-320
Author(s):  
Diomidis S. Michalopoulos ◽  
George K. Karagiannidis
Keyword(s):  
Performance Analysis ◽  
Antenna Arrays ◽  
Cooperative Communications ◽  
Cooperative Relaying ◽  
Diversity Combining ◽  
Practical Applications ◽  
Relaying Protocols ◽  
Diversity Receiver ◽  
Combining Methods ◽  
Switch And Stay Combining

A major advantage of cooperative communications is the potential for forming distributed antenna arrays, that is arrays whose elements are not collocated, but carried by independent relaying terminals. This allows for a study and design of cooperative communications under a novel perspective, where the inherent end-to-end paths between the source and destination terminal constitute the multiple branches of a virtual, distributed diversity receiver. As a result, the well-known combining methods used in conventional diversity receivers can be implemented in a distributed fashion, resulting in novel relaying protocols and, generally, in new ways for exploiting the resources available in cooperative relaying setups. This chapter provides an overview of this distributed diversity concept, as well as a performance analysis of the corresponding distributed diversity schemes, with particular emphasis on the analysis of distributed switch-and-stay combining. Further insights regarding the potential of implementing the distributed diversity concept in practical applications are obtained.

Research on the Application of DPSK Technology in OFDM Doppler Receiver

2012 ◽  
Vol 468-471 ◽  
pp. 2206-2210
Author(s):  
Yao Fu ◽  
Xue Yan Chen ◽  
Yu Feng Ma ◽  
Hong Yuan Wang
Keyword(s):  
Computational Complexity ◽  
Channel Estimation ◽  
Phase Modulation ◽  
Original Data ◽  
Differential Phase ◽  
Doppler Diversity ◽  
Performance Gains ◽  
Diversity Receiver

A Doppler diversity receiver for OFDM is proposed by Kim B C[1], which requires channel estimation at the receiver, so its structure is complicated, what’s more, the receiver needs a large amount of calculation. Different from it, we use the differential phase modulation technology in the OFDM Doppler receiver, so the receiver can recover the original data without channel estimation, and the implement is simple, the computational complexity is low. However, experiment results show that the BER of the new receiver is higher than the conventional, and it can not get performance gains by diversity either.

On Performance of Combining Methods for Three-Node Relay Network

2012 ◽  
Vol 263-266 ◽  
pp. 1160-1164
Author(s):  
Wen Yuan Rao
Keyword(s):  
Relay Network ◽  
Estimation Accuracy ◽  
Diversity Order ◽  
Amplify And Forward ◽  
Decode And Forward ◽  
Channel Quality ◽  
Combining Methods ◽  
Better Than

We study the performance of the three-node relay network. Three combining methods for the Amplify-and-Forward (AF) protocol and the Decode-and-Forward (DF) protocol are compared. Simulations indicate that the AF protocol is better than DF under all these three combining methods. To combine the incoming signals the channel quality should be estimated as accuracy as possible, more estimation accuracy requires more resource. A very simple combining method can obtain the performance comparative with optimal combining methods approximately. At the same time, all three combining methods for both diversity protocols can achieve the maximum diversity order.

scholarly journals A Framework of Multipath Mitigation With Joint Multipath-Doppler Diversity for RF Relative Measurement

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 166839-166851
Author(s):  
Weiqing Mu ◽  
Zijie Wang ◽  
Lantu Guo ◽  
Yanan Liu
Keyword(s):  
Relative Measurement ◽  
Multipath Mitigation ◽  
Doppler Diversity

scholarly journals THEORETICAL AND METHODOLOGICAL ASPECTS OF FORENSIC COMMODITY EXPERTISE

2020 ◽  
Vol 11 (87) ◽  
Author(s):  
Serhii Buzyna ◽  
◽  
Roman Kravchenko ◽  
Keyword(s):  
Basic Principles ◽  
Scientific Methods ◽  
Legal Proceedings ◽  
Related Information ◽  
Legal Limits ◽  
Methodological Aspects ◽  
Examination Process ◽  
Combining Methods ◽  
Selection Of

The article examines the theoretical and methodological aspects of forensic commodity expertise. The main stages and components of the expert examination process are defined. The article analyzes the current legislation in this area, describes existing legislative acts, indicates shortcomings and the need to supplement the regulatory framework. The main problems and specifics of conducting forensic commodity expertise, the process of selecting specialists for expert groups, the criteria for this selection, and so on are identified. Special emphasis is placed on the use of various methods, their objectivity and subjectivity. Measures necessary to improve the objectivity of the expert examination results are described. The possibilities of using certain methods are revealed, the expediency of using expert and measurement methods in various situations, their ratio and accuracy are indicated. The rationality of using the organoleptic method in forensic expertise is evaluated. The directions of expert commodity research determined by specific methods are determined. The origin and possibilities of combining methods in forensic commodity expertise are investigated. The legal limits of conducting an expert examination are outlined, and measures that go beyond the basic principles of legal proceedings and morality are indicated. Special attention is paid to the objects of expertise, their types and definitions, restrictions in the selection of objects, the powers of experts, officials and judicial bodies in the issue of disposing of objects of expertise, and so on. Conditions and factors that can affect the state of objects are evaluated. Particular attention is focused on the role of accompanying documentation and other types of documentation, the importance of accompanying materials and information received for examination. It is mentioned about the possibility of obtaining related information by experts during the expert examination. The scientific origin of expert methodology is analyzed and the possibilities of combining expert and scientific methods are evaluated.

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