1996 - 2016
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...
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(Initial release - January 9, 2015)
Mr. Alok K. Tiwari, of Idea Cellular Ltd., has graciously made this UMTS Transmission Link Planning workbook available. Says Mr. Tiwari, "I have formulated Link Budget calculation in Excel spreadsheet for WDCMA. The spreadsheet uses comprehensive detail of RF fundamentals and formulas to decide cell radius, numbers of cell sites, and different types of clutter. The spreadsheet has been designed to help new engineers to understand the WCDMA RF concept in more details." As with his Transmission Link Planning Tool, this spreadsheet provides a very large number of essential calculations for planning purposes based on user-provided parameters. Examples include receiver thermal noise density, noise figure, noise power, interference margin, processing gain, sensitivity, and path loss. Cell radius, range, and hexagonal cell area, and Edge reliability are also among the results. The page of formulas on the last page is a nice adition.
Please be sure to thank Mr. Alok Tiwari for his work on this spreadsheet and for making it available at no charge. He will appreciate your feedback with suggestions, comments, etc.
Link Budget Page
UMTS Formulas Page
Hata Okumara Model Page
Adjacent Channel Interference Page
Thanks and with warm regards,Alok K. Tiwari Head
Posted January 11, 2015