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This page was originally copied from "An Introduction to LTE RF Planning" on the LTE Encyclopaedia 〔(An Introduction to LTE RF Planning )〕 (Copyright information is not available on the web site referenced) and should be understood to refer only to RF Planning for LTE and similar types of networks and even then only explains the basic concepts involved. In the context of mobile radio communication systems, RF Planning is the process of assigning frequencies, transmitter locations and parameters of a wireless communications system to provide sufficient coverage and capacity for the services required. The RF plan of a cellular communication system has two objectives: coverage and capacity. Coverage relates to the geographical footprint within the system that has sufficient RF signal strength to provide for a call/data session. Capacity relates to the capability of the system to sustain a given number of subscribers. Capacity and coverage are interrelated. To improve coverage, capacity has to be sacrificed, while to improve capacity, coverage will have to be sacrificed The RF Planning process consists of four major stages. ==Phase 1: Initial Radio Link Budgeting== The first level of the RF planning process is a budgetary level. It uses the RF Link Budget along with a statistical propagation model (e.g. Hata, COST-231 Hata or Erceg-Greenstein) to approximate the coverage area of the planned sites and to eventually determine how many sites are required for the particular RF communication system. The statistical propagation model does not include terrain effects and has a slope and intercept value for each type of environment (Rural, Urban, Suburban, etc.). This fairly simplistic approach allows for a quick analysis of the number of sites that may be required to cover a certain area. Following is a typical list of outputs produced at this stage: *Estimated Number of Sites 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「RF Planning」の詳細全文を読む スポンサード リンク
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