Description: OFDMA subchannel allocation has been wellstudied.
However, most of the available literature considers a
single cell system without cochannel interference. We present a
novel intercell interference avoidance scheme, in which the
downlink OFDMA subchannels are allocated through intercell
coordination in a multicell environment. The proposed scheme not
only aims to achieve maximized network throughput but also
focuses on providing improved throughput for cell or sector edge
users that are most affected by intercell interference Platform: |
Size: 311296 |
Author:sim |
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Description: — Performance comparison of multiuser OFDM-TDMA and
OFDMA systems by considering physical and link cross-layer behavior
is conducted in this work. We provide a new framework for performance
evaluation that centers on “ scheduling” with several different
subcarrier/bit allocation schemes. The performance metrics include: the
bit rate, the bit error rate (BER), packet throughput and delay. The
instantaneous channel conditions of users are assumed to be available
at the base station, which can be achieved by channel estimation at the
mobile terminal (MT), and then fed back to the base station through
a control channel. To perform the link layer comparison, we model the
Rayleigh fading channel with a nite-state Markov chain, and adopt the
M/G/1 queueing model as the analytical tool. Computer simulation is
performed to verify conducted analytical results-— Performance comparison of multiuser OFDM-TDMA and
OFDMA systems by considering physical and link cross-layer behavior
is conducted in this work. We provide a new framework for performance
evaluation that centers on “ scheduling” with several different
subcarrier/bit allocation schemes. The performance metrics include: the
bit rate, the bit error rate (BER), packet throughput and delay. The
instantaneous channel conditions of users are assumed to be available
at the base station, which can be achieved by channel estimation at the
mobile terminal (MT), and then fed back to the base station through
a control channel. To perform the link layer comparison, we model the
Rayleigh fading channel with a nite-state Markov chain, and adopt the
M/G/1 queueing model as the analytical tool. Computer simulation is
performed to verify conducted analytical results Platform: |
Size: 166912 |
Author:alaa |
Hits:
Description: Relaying and orthogonal frequency division multiple
access (OFDMA) are the accepted technologies for emerging
wireless communications standards. The activities in many
wireless standardization bodies and forums, for example IEEE
802.16 j/m and LTE-Advanced, attest to this fact. The availability
or lack thereof of efficient radio resource management (RRM)
could make or mar the opportunities in these networks. This
paper therefore provides a comprehensive RRM algorithm for
OFDMA-based multi-cellular fixed relay networks in a way to
ensure fairness among users with minimal impact on the network
throughput (in contrast, pure opportunistic RRM techniques
always favor users with good channel conditions Platform: |
Size: 88064 |
Author:kumar |
Hits:
Description: Relaying and orthogonal frequency division multiple
access (OFDMA) are the accepted technologies for emerging
wireless communications standards. The activities in many
wireless standardization bodies and forums, for example IEEE
802.16 j/m and LTE-Advanced, attest to this fact. The availability
or lack thereof of efficient radio resource management (RRM)
could make or mar the opportunities in these networks. This
paper therefore provides a comprehensive RRM algorithm for
OFDMA-based multi-cellular fixed relay networks in a way to
ensure fairness among users with minimal impact on the network
throughput (in contrast, pure opportunistic RRM techniques
always favor users with good channel conditions Platform: |
Size: 116736 |
Author:kumar |
Hits:
Description: Resource allocation in OFDMA system by low complexity algorithm using M-QAM modulation:- In this the resource allocation of downlink of mobile communication in OFDMA system is efficiently done by the use of low complexity algorithm and the type of modulation used is M-QAM (in this the result are shown for M=4,16). By implementing these new modulation and algorithm to the system the throughput performance is increased as compared to previous technologies tested. Platform: |
Size: 416768 |
Author:yashashchandra |
Hits:
Search - throughput of OFDMA