Báo cáo hóa học: " Software-Defined Radio—Basics and Evolution to Cognitive Radio" pptx
Báo cáo hóa học: " Software-Defined Radio—Basics and Evolution to Cognitive Radio" pptx
... al l these procedures have to be integrated into a gen-
eral encoding/decoding structure. Also a common modula-
tor/demodulator structure has to be specified. Solutions to
these tasks are given, ... CRs.
SDR—Basics and Evolution to Cognitive Radio 281
not. Of course, these visions as well as the recognition cycle for
CRs in [11] are strongly intended to stimulate new research...
Báo cáo hóa học: " Performance analysis of spectrum sharing mechanisms in cognitive radio networks" pptx
... utiliza-
tion. A SU has to vacate the channel p romptly when a
PU returns and handoff to another spectrum hole. When
no spectrum hol e is available, the SU’s ongoing transmis-
sion is terminated and the SU ... ranges
from 0.2 to 2. In the following figures, AR and SR are
the abbreviations for analytical results and simulation
results, respectively, while P and NP represent the...
báo cáo hóa học: " ZAP: a distributed channel assignment algorithm for cognitive radio networks" pot
... of
underutilized frequency bands (out-of-band sensing )and
also for the monitoring of bands to be employed in the
communication of the unlicensed node itself (in-band
sensing). The aim is to detect a possible ... due to a fixed number of nodes and
channels, the percentage of interfering links stay constant
and equals to 20% of the total number of links, as dis-
cussed before. On...
Báo cáo hóa học: " Research Article Resource Allocation in MU-OFDM Cognitive Radio Systems with Partial Channel State Information" potx
... of
the maximum PU tolerable interference power, I
total
,with
P
total
= 25 W and P
m
= 5W,forρ = 0.9 and 0.7 in Figures
6 and 7, respectively. As expected, R
s
increases with I
total
and decreases ... 10152025
R
s
(Mbps)
P
total
(watts)
λ
=[1111]
λ
=[1114]
λ
=[1118]
Figure 4: Average total CRU bit rate, R
s
, versus total CRU transmit
power, P
total
, w ith I
total
= 0.02 W, P
m
= 5W...
Báo cáo hóa học: " Research Article Modeling the Lion Attack in Cognitive Radio Networks" pptx
... some
modifications to the TCP protocol in order to avoid the
degradation of the throughput due to frequency handoffs. In
thisway,CRNdeviceswillbeabletofreezeTCPconnection
parameters during frequency handoffs and ... as in (10)
RTO
i
=
⎧
⎨
⎩
2
i−1
·RTO
min
if i ≤ i
max
,
RTO
max
if i>i
max
,
i
max
= log
2
RTO
max
+1,
RTO
max
= 2
i
max
−1
·RTO
min
,
(9)
t
i
=
⎧
⎨
⎩
RTO
min
if i = 1,
t
i...
báo cáo hóa học:" Research Article Optimization of Sensing Receiver for Cognitive Radio Applications" docx
... identified and stored,
the DSR continuously monitors and reprioritize the channels
as needed. In order to avoid storing “stale” data in the LUT,
the overall
T
sys
must be minimized. Our goal is to optimize
T
sys
by ... scanned
the lower the total sensing time. However, as the number of
candidate channels (ρ) decreases to value typically <10%, the
total sensing time reverses course...
Báo cáo hóa học: " Research Article Probabilistic Coexistence and Throughput of Cognitive Dual-Polarized Networks" doc
... Coexistence and Interference. Consider the
cognitive network shown in Figure 1 with two types of users:
primary and secondary (cognitive) . The primary network
is supposed to be copolar and the cognitive ... Software-defined radio—basics and evolution
to cognitive radio,” EURASIP Journal on Wireless Communica-
tions and Networking, vol. 2005, no. 3, pp. 275–283, 2005....
Báo cáo hóa học: " Editorial 3DTV: Capture, Transmission, and Display of 3D Video" pptx
... Techniques needed to meet the
requirements of typical 3D services and system architectures
are also introduced. These solutions focus on two aspects:
features to facilitate storage and transpor t ... original data and reorganizing
the motions. This go al is achieved by constructing a motion
graph to connect motions with smooth transitions and
using a modified Dijkstra algorithm i...
Báo cáo hóa học: " Research Article Fractional Calculus and p-Valently Starlike Functions" pptx
... gz ∈S
δ
n,p
λ, α and μ>δ− p.
The main object of the present paper is to give coefficients bounds and distortion
inequalities for functions in the classes S
δ
n,p
λ, α and K
δ
n,p
λ, α, ... Owa, “On the distortion theorems—I,” Kyungpook Mathematical Journal, vol. 18, no. 1, pp. 53–59, 1978.
2 H. M. Srivastava and S. Owa, Eds., Univalent Functions, Fractional Calculus, and...
Báo cáo hóa học: " Research Article Fixed Points and Stability of the Cauchy " pptx
... The proof is similar to the proofs of T heorems 2.3 and 5.2.
Corollary 5.5. Let r>1 and θ be nonnegative real numbers, and let f : A → A be a mapping
satisfying 3.7 and 5.5. Then there ... The proof is similar to the proofs of T heorems 2.3 and 3.1.
Corollary 3.4. Let r>1 and θ be nonnegative real numbers, and let f : A → A be a mapping
satisfying 3.7 and 3.8...