Reflecting the author's 25 plus years of experience in signal processing and communication system design, this book is ideal for professional engineers, researchers, and graduate students working in cellular communication systems, radio air-interface technologies, cellular communications protocols, advanced radio access technologies for beyond 4G systems, and broadband cellular standards.
Lte Advanced Sassan Ahmadi Pdf D
DOWNLOAD: https://shurll.com/2vzUrQ
The past two decades have witnessed a phenomenal paradigm shift in the design methodology, and substantial improvement in the performance of mobile broadband wireless access technologies. With the increasing consumer demand for diverse wireless multimedia and data applications, and mobile Internet, improved quality and increasing capacity of the wireless networks have become a priority for the standards development organizations such as 3GPP. 3GPP started the development of the evolved packet system in late 2004, which subsequently resulted in specification and standardization of a new OFDM-based radio access network and an IP-based core network in 3GPP Rel-8, which was further enhanced in the subsequent releases. LTE Rel-10 (i.e., LTE-Advanced) was submitted as a candidate to ITU-R by 3GPP, and was selected as an IMT-Advanced technology in October 2010. The studies and research have continued in order to further advance and improve radio access technologies beyond LTE Rel-10 and HSPA Rel-10 by development of 3GPP Rel-11. The next generation of radio access technologies, informally referred to as systems beyond IMT-Advanced, are currently under investigation. Some of the main considerations in the design and development of new radio interfaces include higher spectral efficiency by using advanced multi-antenna technologies, carrier aggregation, distributed antenna systems, heterogeneous networks and small cells, energy efficiency and green radios, as well as the use of cognitive radios and software-defined radios for more efficient and flexible use of the radio spectrum. The systems beyond IMT-Advanced will encompass the capabilities of previous generations, as well as new communication schemes such as machine-to-machine, machine-to-person, and person-to-machine.
The past two decades have witnessed a rapid growth in the number of subscribers and incredible advancement in technology of cellular communication from simple, all-circuit-switched, analog first generation systems with limited voice service capabilities, limited mobility, and small capacity to the fourth generation systems with significantly increased capacity, advanced all-digital packet-switched all-IP implementations that offer a variety of multimedia services. With the increasing demand for high-quality wireless multimedia services, the radio access technologies continue to advance with faster pace toward the next generation of systems.
The past two decades have witnessed a rapid growth in the number of subscribers and incredible advancement in the technology of cellular communication from simple, all-circuit-switched, analog first-generation systems with limited voice service capabilities, limited mobility, and small capacity to the fourth-generation (4G) systems with significantly increased capacity, advanced all-digital packet-switched all-IP implementations that offer a variety of multimedia services. With the increasing demand for high-quality wireless multimedia services, the radio access technologies continue to advance with faster pace toward the next generation of systems. The general characteristics envisioned for the fourth generation of the cellular systems included all-IP core networks, support for a wide range of user mobility, significantly improved user throughput and system capacity, reliability and robustness, seamless connectivity, reduced access latencies, etc.
IMT-Advanced, or alternatively 4G, cellular systems are mobile systems that extend and improve upon the capabilities of legacy IMT-2000 standards. The IMT-Advanced systems provide the users with access to a variety of advanced IP-based services and applications. The IMT-Advanced systems can support a wide range of data rates, with different QoS requirements, proportional to user mobility conditions in multi-user environments. The key features of IMT-Advanced systems can be summarized as follows [1]:
The 3GPP Rel-8 specifications specified LTE (access network) and EPC (core network) which were completed in late 2008 followed by the UE conformance testing specifications. The 3GPP then worked toward development of an advanced standard specification to address the IMT-Advanced requirements and services for the 4th generation of cellular systems [6,7]. The LTE-Advanced was part of 3GPP Rel-10 and was completed in early 2011. The IMT-Advanced compliant technologies may be available for commercial deployment as early as 2014. 3GPP Rel-11 which initially started as an incremental development, turned into a full release with several features such as coordinated multi-point transmission, enhanced carrier aggregation, and further enhanced inter-cell interference coordination. This release was completed in early 2013. 3GPP is currently working on Rel-12 whose main study and work items are described in Section 1.5.
R&D engineers working in cellular communication systems, radio air-interface technologies, cellular telecommunication protocols, advanced radio access technologies for 4G/5G systems, or broadband cellular standards. Post graduate students and university researchers in mobile and wireless communications
Physical control format indicator channel (PCFICH) carries the control information about the number of orthogonal frequencydivision multiplexing (OFDM) symbols used for transmission of control information in long term evolution-advanced (LTE-A) downlink system. In this paper, two novel low complexity receiver architectures are proposed to implement the maximum likelihood- (ML-) based algorithm which decodes the CFI value in field programmable gate array (FPGA) at user equipment (UE). The performance of the proposed architectures is analyzed in terms of the timing cycles, operational resource requirement, and resource complexity. In LTE-A, base station and UE have multiple antenna ports to provide transmit and receive diversities. The proposed architectures are implemented in Virtex-6 xc6vlx240tff1156-1 FPGA device for various antenna configurations at base station and UE. When multiple antenna ports are used at base station, transmit diversity is obtained by applying the concept of space frequency block code (SFBC). It is shown that the proposed architectures use minimum number of operational units in FPGA compared to the traditional direct method of implementation.
The goal of third generation partnership project (3GPP) long term evolution-advanced (LTE-A) wireless standard is to increase the capacity and speed of wireless data communication. The LTE-A physical layer is a highly efficient means of conveying both data and control information between an enhanced base station, popularly known as eNodeB, and mobile user equipment (UE). It supports both frequency division duplex (FDD) and time division duplex (TDD) configurations in uplink and downlink operations. Further, it provides a wide range of system bandwidths in order to operate in a large number of different spectrum allocations [1].
David Lu, Vice President, D2 Platform & Systems Development, is currently responsible for development and engineering of AT&T next generation ECOMP platform and Open ECOMP (ONAP) to enable the AT&T network virtualization (SDN) and target OSS/BSS transformation including API, micro-services, policy control & orchestration, hyper-automation, and advanced data analytics. He leads an organization with more than 2,000 people across the globe. 2ff7e9595c
Comments