2023
conference-paper
OpenAlex
Roghayeh Joda, Sima Naseri, Mona Hashemi, Christopher D. Richards
Open Radio Access Network (O-RAN) provides the capability to efficiently distribute the RAN Network Functions (NFs) such as the Radio Unit (RU), Distributed Unit (DU) and Centralized Unit (CU) in O-RAN Cloud (O-Cloud) nodes using virtualization, automation, intelligence and open interface specifications. …
ca
(code pays fourni par la source)
2022
conference-paper
OpenAlex
Sima Naseri, Ali Akbar Dehghan, Amir H. Banihashemi
In this paper, a probabilistic analysis of the cycle distribution of protograph-based spatially coupled low-density parity-check (SC LDPC) codes is presented. In particular, we derive the probability that cycles of specific, but arbitrary, length are broken as a result of spatial coupling …
ca
(code pays fourni par la source)
2021
article
OpenAlex
Sima Naseri, Amir H. Banihashemi
In this paper, we propose a design technique for the construction of variable-regular time-invariant spatially-coupled low-density parity-check (SC-LDPC) codes with small constraint length and low error floor. The proposed technique reduces the error floor by imposing simple constraints on the short cycles …
ca
(code pays fourni par la source)
Accès ouvert
2021
dissertation
OpenAlex
Sima Naseri
Forward error-correcting (FEC) codes play an important role in transmitting data with extremely high reliability through modern communication systems.Many applications such as optical communication channels require a very low error rate when transmitting data.In this thesis, we study the design and analysis …
ca
(code pays fourni par la source)
2019
article
OpenAlex
Sima Naseri, Amir H. Banihashemi
In this letter, we design time-invariant spatially coupled low-density parity-check (SC-LDPC) codes with small constraint length and low error floor. For this, we modify the codes in the literature that have (close to) minimal constraint length for a given degree distribution and …
ca
(code pays fourni par la source)
2019
article
OpenAlex
Sima Naseri, Amir H. Banihashemi
In this letter, we propose a new technique to design quasi-cyclic low-density parity-check (QC-LDPC) codes with girth 8 and variable node degrees 3 and 4. Small trapping sets are avoided in the designed codes by imposing simple constraints on the cycles of …
ca
(code pays fourni par la source)
2014
conference-paper
OpenAlex
Behrooz Razeghi, Alireza Alizadeh, Sima Naseri, Ghosheh Abed Hodtani et autres
We study and analyze coverage region in MIMO communication systems for a multiple-relay network with decode-and-forward (DF) strategy at the relays. Assuming that there is a line-of-sight (LOS) propagation environment for source-relay channels and channel state information is available at receivers (CSIR), …
ir
(code pays fourni par la source)
Accès ouvert
2014
preprint
OpenAlex
Sima Naseri, Somaie Yazdani, Behrooz Razeghi, Ghosheh Abed Hodtani
In this paper, we propose a generalized write channel model for bit-patterned media recording by considering all sources of errors causing some extra disturbances during write process, in addition to data dependent write synchronization errors. We investigate information-theoretic bounds for this new …
ir
(code pays fourni par la source)
Accès ouvert
2014
preprint
OpenAlex
Behrooz Razeghi, Alireza Alizadeh, Sima Naseri, Ghosheh Abed Hodtani et autres
We study and analyze coverage region in MIMO communication systems for a multiple-relay network with decode-and-forward (DF) strategy at the relays. Assuming that there is a line-of-sight (LOS) propagation environment for source-relay channels and channel state information is available at receivers (CSIR), …
ir
(code pays fourni par la source)
Accès ouvert
2014
preprint
OpenAlex
Behrooz Razeghi, AliReza Alizadeh, Sima Naseri, Ghosheh Abed Hodtani et autres
We study and analyze coverage region in MIMO communication systems for a\nmultiple-relay network with decode-and-forward (DF) strategy at the relays.\nAssuming that there is a line-of-sight (LOS) propagation environment for\nsource-relay channels and channel state information is available at receivers\n(CSIR), we consider the objective …
ir
(code pays fourni par la source)