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octoFade channel models

octoFade support the following 3GPP and IEEE 802.11 channel models.

LTE models

Per 3GPP document 36.101 v10.8.0

  # taps Delay spread (rms) Max excess tap delay Correlation matrices Notes
EPA 5Hz 7 45 ns 410 ns High
Medium
Low
Custom (e.g. Verizon)
5 Hz Doppler
EVA 5Hz 9 357 ns 2.510 µs 5 Hz Doppler
EVA 70Hz 70 Hz Doppler
ETU 70Hz 9 991 ns 5 µs 70 Hz Doppler
ETU 300Hz 300 Hz Doppler
MBSFN 18   30 µs Mobile TV

EPA = Extended Pedestrian A
EVA = Extended Vehicular A
ETU = Extended Typical Urban
MBSFN = Multicast-Broadcast Single Frequency Network

GSM models

Per 3GPP document TS 45.005 V10.3.0

  # taps Max excess tap delay
RAx 6 500 ns
HTx 6 17.2 µs
12 20 µs
TUx 6 5 µs
12 5 µs
EQx 6 16 µs
TIx 2 400 ns

RA = Rural area
HT = Hilly Terrain
TU = Typical Urban
EQ = Equalization test
TI = Typical Indoor
x = indicates vehicle speed (km/h)

UMTS/WCDMA models

Per 3GPP document TS 25.101 V11.0.0

  # taps Max excess
tap delay
Notes
Case1 2 976 ns If Band == 1, 2, 3, 4, 9, 10, 25 Then v = 3
If Band == 5, 6, 8, 19, 20 Then v = 7
If Band == 7 Then v = 2.3
If Band == 11, 21 Then v = 4.1
If Band == 12, 13, 14 Then v = 8
If Band == 22 Then v = 1.7
Case2 3 20 µs If Band == 1, 2, 3, 4, 9, 10, 25 Then v = 3
If Band == 5, 6, 8, 19, 20 Then v = 7
If Band == 7 Then v = 2.3
If Band == 11, 21 Then v = 4.1
If Band == 12, 13, 14 Then v = 8
If Band == 22 Then v = 1.7
Case3 4 781 ns If Band == 1, 2, 3, 4, 9, 10, 25 Then v = 120
If Band == 5, 6, 8, 19, 20 Then v = 282
If Band == 7 Then v = 92
If Band == 11, 21 Then v = 166
If Band == 12, 13, 14 Then v = 320
If Band == 22 Then v = 69
Case4 2 976 ns If Band == 1, 2, 3, 4, 9, 10, 25 Then v = 3
If Band == 5, 6, 8, 19, 20 Then v = 7
If Band == 7 Then v = 2.3
If Band == 11, 21 Then v = 4.1
If Band == 12, 13, 14 Then v = 8
If Band == 22 Then v = 1.7
Case5 2 976 ns If Band == 1, 2, 3, 4, 9, 10, 25 Then v = 50
If Band == 5, 6, 8, 19, 20 Then v = 118
If Band == 7 Then v = 38
If Band == 11, 21 Then v = 69
If Band == 12, 13, 14 Then v = 133
If Band == 22 Then v = 29
Case6 4 781 ns If Band == 1, 2, 3, 4, 9, 10, 25 then v = 250
If Band == 5, 6, 8, 19, 20 Then v = 583
If Band == 7 Then v = 192
If Band == 11, 21 Then v = 345
If Band == 12, 13, 14 Then v = 668
If Band == 22 Then v = 143
Case8 2 976 ns CQI test in multi-path fading and HS-SCCH-less demodulation of HS-DSCH
If Band == 1, 2, 3, 4, 9, 10, 25 then v = 30
If Band == 5, 6, 8, 19, 20 Then v = 71
If Band == 7 Then v = 22
If Band == 11, 21 Then v = 41
If Band == 12, 13, 14 Then v = 80
If Band == 22 Then v = 17
PA3 4 410 ns If Band == 1, 2, 3, 4, 9, 10, 25 Then v = 3
If Band == 5, 6, 8, 19, 20 Then v = 7
If Band == 7 Then v = 2.3
If Band == 11, 21 Then v = 4.1
If Band == 12, 13, 14 Then v = 8
If Band == 22 Then v = 1.7
PB3 6 3.7 µs If Band == 1, 2, 3, 4, 9, 10, 25 Then v = 3
If Band == 5, 6, 8, 19, 20 Then v = 7
If Band == 7 Then v = 2.3
If Band == 11, 21 Then v = 4.1
If Band == 12, 13, 14 Then v = 8
If Band == 22 Then v = 1.7
VA30 6 2.51 µs If Band == 1, 2, 3, 4, 9, 10, 25 then v = 30
If Band == 5, 6, 8, 19, 20 Then v = 71
If Band == 7 Then v = 22
If Band == 11, 21 Then v = 41
If Band == 12, 13, 14 Then v = 80
If Band == 22 Then v = 17
VA120 6 2.51 µs If Band == 1, 2, 3, 4, 9, 10, 25 Then v = 120
If Band == 5, 6, 8, 19, 20 Then v = 282
If Band == 7 Then v = 92
If Band == 11, 21 Then v = 166
If Band == 12, 13, 14 Then v = 320
If Band == 22 Then v = 69
MBMS_VA3 6 2.51 µs If Band == 1, 2, 3, 4, 9, 10, 25 Then v = 3
If Band == 5, 6, 8, 19, 20 Then v = 7
If Band == 7 Then v = 2.3
If Band == 11, 21 Then v = 4.1
If Band == 12, 13, 14 Then v = 8
If Band == 22 Then v = 1.7
MBSFN25101 18 30 µs If Band == 1, 2, 3, 4, 9, 10, 25 Then v = 3
If Band == 5, 6, 8, 19, 20 Then v = 7
If Band == 7 Then v = 2.3
If Band == 11, 21 Then v = 4.1
If Band == 12, 13, 14 Then v = 8
If Band == 22 Then v = 1.7

PA = Pedestrian A
VA = Vehicular A
MBSFN = Multicast-Broadcast Single Frequency Network
v = velocity in km/h

3GPP models - special cases

Model: Birth-Death

Path1delay (µsec)
  1. Two paths, Path1 and Path2 are randomly selected from the group[-5,-4,-3,-2,-1,0,1,2,3,4,5] µsec.
  2. After 191 ms, Path1 vanishes and reappears immediately at a new location randomly selected from the group [-5,-4,-3,-2,-1,0,1,2,3,4,5] µsec but excludes the point Path 2.
  3. After an additional 191 ms, Path2 vanishes and reappears immediately at a new location randomly selected from the group [-5,-4,-3,-2,-1,0,1,2,3,4,5] µsec but excludes the point Path 1.
The sequence in 2) and 3) is repeated
Path2delay (µsec)
Path1magnitude (dB) Path1magnitude =0 The magnitudes and the phases of the tap coefficients of Path 1 and Path 2 shall remain unaltered. Defaults are 0; can be overwritten via API
Path2magnitude (dB) Path2magnitude =0
Path1phase (deg) Path1phase =0
Path2phase (deg) Path2phase =0

Model: HST (high speed train)

Band: Band = [1..25]  
Doppler frequency (Hz): fd = [600, 750] 600 for 25.101; 750 for 36.101
# taps: numberOfTaps = 1  
Distance of train from BS (m): Ds = 300 Default values shown; can be overwritten via API
BS-Railway track distance (m): Dmin = 2
Velocity of train (km/h) v = 300

AWGN/SNR models

SNR: -10 to +25dB; 0.1dB resolution
Bandwidth: Up to 20MHz, per 3GPP standard requirements

802.11n/ac models

The following 802.11n/ac channel models are currently available as C-software. We are working on the real-time RTL implementation of these models and welcome customer inquiries.

802.11n/ac channel model Distance to 1st wall (avg) # taps Delay spread (rms) Max delay
A test model   1 0 ns 0 ns
B Residential 5 m 9 15 ns 80 ns
C small office 5 m 14 30 ns 200 ns
D typical office 10 m 18 50 ns 390 ns
E large office 20 m 18 100 ns 730 ns
F large space
(indoor or outdoor)
30 m 18 150 ns 1050 ns
Impairments
AWGN
Phase offset
Frequency offset
Spurious
IQ imbalance