Umts Link Budget Calculator 84i1u

NCozoo July 30, 2010

UMTS UL link Budget Calculatio Formulas

EIRP=Tx Power+Antenna Gain-losses

Receiver noise density No [dB]=Thermel Noise density[dBm/Hz]+NF[dB] Noise Floor (Receiver noise power) dB=No dB+10 log(chip rate)

Processing Gain dB=10 log(chip rate/bit rate)=10 log(3840kbps/bit ratekbps)

Eb/No dB = Ec/Io dB + Processing Gain dB

S.N. (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12)

Receiver Sensitivity or required minimum signal power or required minimum RS [dB]=Noise Floor dB + SNR (Ec/Io) dB

(13)

Noise Rise (Interference Margin)[dB]= -10 log(1-UL cell loading factor)

(14) (15) (16) (17) (18) (19) (20) (21) (22) (23)

MAPL=EIRP-Receiver sensitivity+Gains-Margins-Losses

UMTS DL link Budget Calculatio

Receiver noise density No [dB]=Thermel Noise density[dBm/Hz]+NF[dB] Noise Floor (Receiver noise power) dB=No dB+10 log(chip rate)

Processing Gain dB=10 log(chip rate/bit rate)=10 log(3840kbps/bit ratekbps)

Eb/No dB = Ec/Io dB + Processing Gain dB Receiver Sensitivity or required minimum signal power or required minimum RS [dB]=Noise Floor dB + SNR (Ec/Io) dB

Noise Rise (Interference Margin)[dB]= -10 log(1-DL cell loading factor)

MAPL=EIRP-Receiver sensitivity+Gains-Margins-Losses

S.N. (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) (17) (18) (19) (20) (21)

EIRP=Tx Power+Antenna Gain-losses

(22)

Values in Green boxes can be edited UMTS UL link Budget Calculation ( Tx is UE and Rx is BS) Item Value Tx Power UE Tx Antenna Gain body loss EIRP(MS) includig body loss = (1)+(2)-(3) Thermal Noise density Receiver noise figure (NF) Receiver noise density No = (5)+(6) Receiver noise power = (7)+10 log(3.84Mbps) Required Eb/No Required bit rate Procesing gain (PG) = 10log(3840Kbps/(10)) Required wideband SNR (Ec/Io) dB at receiver= (9)-(11) Receiver sensitivity (S) =(8)+(12) Rx Antenna gain Master Head Amplifier (MHA) gain SHO gain cable and feeder losses Indoor loss (penetration Margin) Slow fading constant Slow fading margin Fast fade Margin power control imperfection Margin Interference Margin (Noise Rise) MAPL (UL) = (4)-(13)+(14)+(15)+(16)-(17)-(18)-(19)-(20)-(21)-(22)-(23)

21 0 3 18 -174 3 -171 -105.16 4.2

Unit dBm dBi dB dBm dBm/Hz dB dBm/Hz dBm dB

12 kbps 25.05 dB -20.85 dB -126.01 17.9 0 2 3 21 7.5 2.2 0 2 3 125.21

dBm dBi dB dB dB dB dB dB dB dB dB dB

UMTS DL link Budget Calculation ( Tx is BS and Rx is MS) Item Value Unit To get the link balanced MAPL (DL) = MAPL (UL) 125.21 dB Thermal Noise density -174 dBm/Hz Receiver noise figure (NF) 8 dB Receiver noise density No = (2)+(3) -166 dBm/Hz Receiver noise power = (4)+10 log(3.84Mbps) -100.16 dBm Required Eb/No 1.1 dB Required bit rate 12 kbps Procesing gain (PG) = 10log(384kbps/(7)) 25.05 dB Required wideband SNR (Ec/Io) dB at receiver= (6)-(8) -23.95 dB Receiver sensitivity (S) =(5)+(9) Tx Antenna gain cable and feeder losses Master Head Amplifier (MHA) gain SHO gain Indoor loss (penetration Margin) Slow fading constant Slow fading margin Fast fade Margin power control imperfection Margin Interference Margin (Noise Rise) EIRP(BS)=(1)+(10)-(13)-(14)+(15)+(16)+(17)+(18)+(19)+(20)

-124.11 17.9 3 0 2 21 7.5 2.2 0 2 3 34.80

dBm dBi dB dB dB dB dB dB dB dB dB dBm

Tx Power (BS)=(21)-(11)+(12) Tx Power (BS)= If no of simultaneous s = Then Node B (BS) power should be Then Node B (BS) power should be

19.90 0.10 50 4.89 36.89

dBm/ watt/ s watt dBm

Node B side

UE side

Remark

The Propagation Loss Formula 150 MHz to 1500 MHz band Okumura-Hata Model MAPL = 69.55+26.16 log(f)-13.82 log(hb)+(44.9 - 6.55 log(hb)) log(d) hb MAPL = f= 26.6log(f) = 13.82log(hb) = 44.9-6.55log(hb) = log(d) = d=

metre 25 125.21 900 MHz 78.58 19.32 35.74 -0.10 0.79 Km

change antenna height and

get cell radius

1800 MHz COST-231 model MAPL = 46.3+33.9 log(f)-13.82 log(hb)+(44.9 - 6.55 log(hb)) log(d)

UE Side

hb MAPL = f= 33.9log(f) = 13.82log(hb) = 44.9-6.55log(hb) = log(d)= d=

50 metre 125.21 1800 MHz 110.35 23.48 33.77 -0.24 0.58 Km