nokia metro bts

1 © NOKIA MetroSite EDGE RF perf ver 1.0.ppt Customer Confinential

Nokia MetroSite EDGE BTS

RF Performance with EDGE Capable TRX

Juha T. Tikka, Ari Rehnberg2.6.2004 / Ver 1.0


Nokia MetroSite EDGE BTSRF Performance

• This slideset gives RF performance values for GSM800, GSM900, GSM1800 and GSM1900 Nokia MetroSite EDGE BTS. These values can be used for customer tenders and as network planning values.

• Given RF performance values only apply for EDGE capable TRXs:

• The next pages describes how BTS output power and receiver sensitivity values are defined.

Code Description Version

469690A CTGA TRX UNIT EDGE 900 (A)

All

469691A CTDA TRX UNIT EDGE 1800 All

469874A CTGH TRX UNIT EDGE 900 (H)

All

469875A CTGJ TRX UNIT EDGE 900 (J) All

468654A WTFA TRX UNIT EDGE 800 All

468231A WTPA TRX UNIT EDGE 1900 All



BTS Output Power:

• Shown figures are nominal output power values, which are based on the average of production measurements at TRX output connector

• Output power values are with GMSK modulation. With 8-PSK modulation, values are 2 dB less for 800 and 1900, and 4 dB less for 900 and 1800 MHz.

• Intelligent Downlink Diversity (IDD) doubles the received signal power at terminal and multiple diversity combining adds downlink gain by average of 2dB. Shown output power values are after air combining without antenna gain.



BTS Receiver Sensitivity

• Shown figures are nominal sensitivity values, which are based on the average of production measurements at the BTS antenna connector - middle point of tolerance in TRX

• BTS sensitivity values are given without any frequency hopping gain etc.• Receiving options:

• 2-way diversity = Rx signal is received with two antennas (one X-pol) and signals are constructively combined using Interference Rejection Combining (IRC) method

• Single branch = RX signal is received with one antenna

• NOTE: In MetroSite, 2-way diversity is available when having two or more TRX’s/sector, or by using the optional TRX diversity module (available Q1/05 for 900 and 1800)


MetroSite RF Performance in GSM 900

BTS Output PowerGSM 900

Output PowerdBm W

TRX output 41.0 13

IDD 45 32

BTS Receiver SensitivityGSM 900

SensitivitydBm

2-way diversity -114.0

Single branch -111.0




Output PowerdBm W

TRX output 41.0 13

IDD 45 32


SensitivitydBm






Output PowerdBm W

TRX output 37.0 5

IDD 41 13


SensitivitydBm



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