(To be removed) Construct bell-shaped Doppler spectrum object
doppler.ajakes will be removed in a future release. Use
('Bell', ...) instead.
doppler.bell creates a bell Doppler spectrum object. You can use this object with the
DopplerSpectrum property of any channel object created with either the
rayleighchan function, the
ricianchan function, or
doppler.bell creates a bell Doppler spectrum object with default
doppler.bell(coeffbell) creates a bell Doppler spectrum object
with coefficient given by
coeffbell is a
positive, finite, real scalar.
The bell Doppler spectrum object has the following properties.
|SpectrumType||Fixed value, 'Bell'|
|CoeffBell||Bell spectrum coefficient, positive real finite scalar.|
A bell spectrum was proposed in  for the Doppler spectrum of indoor MIMO channels, for 802.11n channel modeling.
The normalized bell Doppler spectrum is given analytically by:
fd represents the maximum Doppler shift specified
for the channel object, and A represents a positive real finite scalar
CoeffBell). The indoor MIMO channel model of IEEE 802.11n  uses the
following parameter: A = 9. Since the channel is modeled as Rician fading with
a fixed line-of-sight (LOS) component, a Dirac delta is also present in the Doppler spectrum at
f = 0.
Construct a bell Doppler spectrum object with a coefficient of 8.5. Assign it to a Rayleigh channel object with one path.
dop = doppler.bell(8.5); chan = rayleighchan(1e-5, 10); chan.DopplerSpectrum = dop;
 IEEE P802.11 Wireless LANs, “TGn Channel Models”, IEEE 802.1103/940r4, 2004-05-10.