1 Introduction
2 Channel model
2.1 Geometry and channel response
2.2 Simulation examples
Param. | Value | Description |
---|---|---|
N
r
| 8 | Number of antennas on the receiving side |
N
t
| 8 | Number of antennas on the transmitting side |
v
r
| 30 km/h | Speed of the receiver |
v
t
| 0 km/h | Speed of the transmitter |
W
| 6 MHz | Required channel half-bandwidth |
f
c
| 2 GHz | Carrier frequency |
d
r
, d
t
| 0.5 | Receive/transmit antenna spacing normalized to |
wave length | ||
P
c
| 1 | Power weights for clusters |
ϕ
0r
| 20° | Azimuthal angle at which center of the cluster |
is seen to the receiver | ||
ϕ
0t
| 10° | Azimuthal angle at which center of the |
cluster is seen to the transmitter | ||
α
r
,α
t
| 0° | The angle between broadside vector and |
movement direction | ||
Δ
ϕ
r
| 5° | Angular spread seen from receiving side |
Δ
ϕ
t
| 8° | Angular spread seen from transmitting side |
τ
| 0.3 μ s | A mean delay associated with the cluster |
Δ
τ
| 0.1 μ s | Corresponding delay spread |
F
st
| 50 MHz | Sampling frequency in delay domain |
F
s
| 250 Hz | Rate of sampling in Doppler domain |
irL | 142 | Length of the impulse response (num of samples) |
L
| 1,024 | Number of samples (in Doppler domain) |
Nf | 128 | Number of equally spaced samples for process |
representation at bandwidth [ −W, W] | ||
rate | 105 bps | The transmission rate, bits per second |
Cluster | Parameter | Value |
---|---|---|
Cluster1 | 10° | |
τ
1
| 0.3 μ s | |
P
1
| 0.6 | |
Cluster2 | 120° | |
τ
2
| 0.8 μ s | |
P
2
| 0.4 |
3 Transmission system
4 Simulation results of system performance in different scenarios
4.1 V2I communication scenario
4.2 V2V communications scenario
4.3 Simulation of a real intersection in V2I case
Cluster 1 | Cluster 2 | Cluster 3 | Cluster 4 | |
---|---|---|---|---|
ϕ
r
(°) | 121.3 | 46.1 | 26.3 | 22 |
Δ ϕ
r
(°) | 25.7 | 35.7 | 2.4 | 16.7 |
ϕ
t
(°) | 134.8 | 143.9 | 134.3 | 134.9 |
Δ ϕ
t
(°) | 3.4 | 5.1 | 0.6 | 6 |
τ (μ s) | 1.68 | 1.43 | 1.38 | 1.38 |
Δ τ (μ s) | 0.09 | 0.08 | 0.003 | 0.01 |
h (m) | 55.7 | 64.55 | 31.88 | 42.78 |
P
| 0.3 | 0.3 | 0.1 | 0.3 |