{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

RF Guidelines 900 - RF GUIDELINES GSM 900 CME 20 R5...

Info icon This preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
LV/R-96:269 Rev B 1996-09-06 1(27) RF GUIDELINES, GSM 900 CME 20 R5 Ericsson Radio Systems AB 1996 The contents of this product are subject to revision without notice due to continued progress in methodology, design and manufacturing. Ericsson assumes no legal responsibility for any error or damage resulting from usage of this product.
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
CME 20 R5 2(27) LV/R-96:269 Rev B 1996-09-06
Image of page 2
RF GUIDELINES, GSM 900 CME 20 R5 LV/R-96:269 Rev B 1996-09-06 3(27) Contents 1 Revision history ............................................................... 5 2 Introduction ...................................................................... 5 3 Site equipment parameters .............................................. 5 3.1 Nominal or worst case values ............................................................ 5 3.2 BTS output power ............................................................................. 6 3.3 Sensitivity ......................................................................................... 8 3.4 Micro base station ............................................................................ 8 3.5 Mobile station ................................................................................... 8 3.6 Antenna near part ............................................................................. 9 3.7 Repeaters ...................................................................................... 13 3.8 Configurations ................................................................................ 13 4 Cell coverage .................................................................. 15 4.1 Wave propagation models for estimation .......................................... 15 4.2 Minimum required signal strength ..................................................... 16 4.3 Fading Conditions ........................................................................... 16 4.4 Interference Margin ........................................................................ 18 4.5 Indoor coverage ............................................................................. 19 4.6 In-car coverage .............................................................................. 20 4.7 Interference levels .......................................................................... 20 5 Cell planning .................................................................. 23 5.1 Power budget ................................................................................. 23 5.2 Power balance ............................................................................... 24 5.3 Summary of coverage requirements ................................................. 25 5.4 Cell size ......................................................................................... 25 6 References ...................................................................... 27 Appendix: 1. Curves of Jakes formula, Cumulative normal function 2. Simulated log-normal fading margins 3. Quick reference - cell planning CME 20, GSM 900 4. Example of RF-budget for 2 W MS, urban areas and typical case 5. Example of RF-budget for 2 W MS, rural areas and typical case
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
CME 20 R5 4(27) LV/R-96:269 Rev B 1996-09-06
Image of page 4
RF GUIDELINES, GSM 900 CME 20 R5 LV/R-96:269 Rev B 1996-09-06 5(27) 1 Revision history Rev Date Description A 1996-06-19 Created A 1996-06-20 Minor changes B 1996-09-06 A number of minor changes 2 Introduction This document contains information about site equipment and cell planning policy for CME 20, GSM 900. 3 Site equipment parameters The GSM 900 system is required to operate in the following frequency band, with a carrier spacing of 200 kHz: Table 1. Frequency band of GSM 900. MS transmit, Base receive 890 - 915 MHz Base transmit, MS receive 935 - 960 MHz 3.1 Nominal or worst case values Discussions on the link budget have a tendency to focus on which type of figures to use; worst or nominal case. However, the following is a practical way to deal with this problem. Nominal values By nominal value is meant the expected value. For cell planning purposes nominal values are preferred, as the result will be more close to reality than with worst case values. Cell planning tools calculate the cell range expressed as a probability to reach an MS at the cell border. Using nominal values in the link budget will result in a variation around this probability figure among the different cells. For the total network however, the desired probability is achieved. However, the variation is not necessarily stochastic. That means, the mean performance is not guaranteed for a limited delivery of base stations.
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
CME 20 R5 6(27) LV/R-96:269 Rev B 1996-09-06 Guaranteed values, worst case Dimensioning a system with guaranteed values will of course give a higher coverage probability at the cell border, but the network will be better than planned and consequently more costly. Guaranteed value means that under all circumstances, individual variation, temperature range, power supply levels, aging, etc. a unit will show at least guaranteed figures.
Image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern