[雙語翻譯]--外文翻譯--無線通信中l(wèi)te版本8與版本10的性能（節(jié)選）

1、中文 中文 3300 字， 字，1900 單詞， 單詞，1.1 萬英文字符 萬英文字符出處： 出處：Abdullah M F L, Yonis A Z. Performance of LTE Release 8 and Release 10 in wireless communications[C]// International Conference on Cyber Security, Cyber Warfare and Digit

2、al Forensic. IEEE, 2012:236-241.Performance of LTE Release 8 and Release 10 inWireless CommunicationsMFL Abdullah，AZ YonisAbstract—LTE-Advanced (Release 10) is a preliminary mobile communication standard formally submitt

3、ed as a candidate 4G systems to the ITU-T. It is being standardized by the 3rd，Generation Partnership Project (3GPP) as a major enhancement of the 3GPP Long Term Evolution (LTE-Release 8) standard, which proved to be suf

4、ficient to satisfy market’s demand. The 3GPP group has been working on different aspects to improve LTE performance, where the purpose of the framework provided by LTE-Advanced, includes higher order MIMO, carrier aggreg

5、ation (carriers with multiple components), and heterogeneous networks (relays, picos). This paper presents a study on evolution LTE toward LTE-Advanced in terms of LTE enabling technologies (Orthogonal Frequency Division

6、 Multiplexing (OFDM) and Multiple-Input Multiple-Output (MIMO)). This paper also focuses on LTE-Advanced technologies MIMO enhancements for LTE-Advanced, Coordinated Multi Point transmission (CoMP), repeaters andrelays.K

7、eywords-LTE; LTE-Advanced; MIMO; OFDMA; CoMP.I. INTRODUCTIONMobile communications has become an everyday commodity. In the last decades, it has evolved from being an expensive technology for a few selected individuals to

8、 today’s ubiquitous systems used by a majority of the world’s population. From the first experiments with radio communication the road to truly mobile radio communication has been quite long. To understand the complex mo

9、bilecommunication systems of today, it is important to understand where they came from and how cellular systems have evolved. The task of developing mobile technologies has also changed, from being a national or regional

10、 concern, to becoming an increasingly complex task undertaken by global standardsdeveloping organizations such as the Third Generation Partnership Project (3GPP) and involving thousands of people. Mobile communication te

11、chnologies are often divided into generations, with 1G being the analog mobile radio systems of the 1980s, 2G the first digital mobile systems, and 3G the first mobile systems handling broadband data. The LTE is often ca

12、lled “4G”, but many also claim that LTE release 10, also referred to as LTE-Advanced, is the true 4G evolution step, with the first release of LTE (release 8). This continuing race of increasing sequence numbers of mobil

13、e system generations is in fact just a matter of labels. In this context, it must first be pointed out that LTE and LTE-Advanced is the same technology, with the “Advanced” label primarily being added to highlight the re

14、lation between LTE release 10 (LTEAdvanced) and ITU/IMT-Advanced. This does not make LTEAdvanced a different system than LTE and it is not in any way the final evolution step to be taken for LTE [1]. Section 2 of this pa

15、per discusses the current development processes from the first LTE release to LTE-Advanced and the limited research directions related to the development of communication systems, while section 3 describes the 3GPP LTE w

16、hich is called release 8. The main specifications of LTE enabling technologies are described in section 4 with the important properties of OFDM and MIMO. In section 5, the major developments on LTE technology which calle

17、d “LTEAdvanced” (Release 10) are reviewed appended by the characteristics of peak data rate, mobility Figure 1. approximate timeline of the mobile communications standardsLandscapeIn continuing the technology progression

18、 from the GSM and UMTS technology families within 3GPP, the LTE system can be seen as completing the trend of expansion of service provision beyond voice calls towards a multi service air interface. This was already a ke

19、y aim of UMTS and GPRS/EDGE, but LTE was designed from the start with the goal of evolving the radio access technology under the assumption that all services would be packet-switched, rather than following the circuit-sw

20、itched model of earlier systems. Furthermore, LTE is accompanied by an evolution of the nonradio aspects of the complete system, under the term ‘System Architecture Evolution’ (SAE) which includes the Evolved Packet Core

21、 (EPC) network. Together, LTE and SAE comprise the Evolved Packet System (EPS), where both the core network and the radio access are fully packet-switched [2].III. LONG TERM EVOLUTION (RELEASE 8)The 3GPP LTE called relea

22、se 8 specification defines the basic functionality of a new, high-performance air interface providing high user data rates in combination with low latency based on MIMO, OFDMA and an optimized system architecture evoluti

23、on (SAE) as main enablers. At the same time, in the near future increasing numbers of users will request mobile broadband data access everywhere—for example, for synchronization of e-mails, Internet access, specific appl

24、ications, and file downloads to mobile devices like personal digital assistants (PDAs) or notebooks. In the future, a 100-fold increase in mobile data traffic is expected, making further improvements beyond LTE release 8

25、 necessary and possibly ending in new LTE releases or in a so-called IMT (international mobile telecommunications) advanced system. The LTE successor of the third-generation mobile radio network will delight customers mo

26、re than ever. The need for radio coverage will be a primary goal in the rollout phase, whereas a high capacity all over the radio cell will be the longterm goal. High spectral efficiency is crucial for supporting the hig