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Next generation wireless systems and networks phần 9

Vì vậy, quyết định về khối có thể được thực hiện từ phương trình (8,49) bị hỏng bởi MAI và tiếng ồn. Bây giờ hãy để chúng tôi sửa chữa đầu tiên H1 như là một ma trận liên tục và xử lý Hk như một ma trận với tất cả các phần tử của nó là Rayleigh biến phân phối ngẫu nhiên. Nó có thể được chỉ ra rằng sự thay đổi của mỗi phần tử trong vector MAI hoặc | 400 E-UTRAN 3GPP S EVOLUTIONAL PATH TO 4G RR specifications in the Universal Terrestrial Radio Access Network UTRAN the specification of the access network interfaces Iu Iub and Iur the definition of the Operations and Maintenance O M requirements in UTRAN and conformance testing for the Base Stations. 10.2 Origin of E-UTRAN At the 3GPP TSG RAN 26 meeting the Study Item description on Evolved UTRA and UTRAN was approved 815 . It is noted that all 3GPP TSG RAN meetings after the 26 meeting have been called 3GPP TSG RAN new meetings. The justification of the Study Item was that with enhancements such as HSDPA and HSUPA the 3GPP radio-access technology will be highly competitive for several years. However to ensure competitiveness in an even longer time frame that is for the next 10 years and further a long-term evolution of the 3GPP radio-access technology needs to be considered. Important parts of such a long-term evolution include reduced latency higher user data rates improved system capacity and coverage and reduced cost for the operator. In order to achieve this an evolution of the radio interface as well as the radio network architecture should be considered. Considering a desire for even higher data rates and also taking into account future additional 3G spectrum allocations the long-term 3GPP evolution should include an evolution toward support for wider transmission bandwidth than 5 MHz. At the same time support for transmission bandwidths of 5 MHz and less than 5 MHz should also be investigated in order to allow for more flexibility in whichever frequency bands the system may be deployed. 3GPP work on the Evolution of the 3G Mobile System started with the RAN Evolution Workshop held from 2-3 November 2004 in Toronto Canada. The Workshop was open to all interested organizations and members and nonmembers of 3GPP. Operators manufacturers and research institutes presented more than 40 contributions with views and proposals on the evolution of the UTRAN. A set