Dr.P.Dananjayan
@spiher.ac.in
Vice Chancellor, St.Peter’s Institute of Higher Education and Research, Chennai.
Vice Chancellor
Prof. Dananjayan has published more than 115 research papers in International peer reviewed journals with
more than 1216 citations, h-index as 17 and i-10 index as 34. He has guided 21 Ph.D. scholars and significant number of
post graduate and M.Phil. scholars. He has organised 5 National/International Conferences, Seminars and Workshops and
has presented more than 150 papers in International/ National Conferences, Seminars and Workshops. He has delivered
more than 50 Invited talks in National/ International Conferences, Seminars and Workshops. He has authored/edited some
chapters in International books in different publications. He is the member of several editorial boards and also a reviewer of
several reputed international journals Prof. Danajayan has been the principal investigator and co-investigator of several sponsored major projects
with a fund of more than 11 crore funded by the various organizations such as DST-FIST,
EDUCATION
Dr. Dananjayan Perumal was born on 12th May 1957. He has completed his undergraduate degree in Engineering
(Electronics) from Madras Institute of Technology, University of Madras in the year 1982 followed by his post graduation in
Engineering in Electronics from the same institute in the year 1984. He went on to complete his Ph.D. in Electronics in the year
1998 from College of Engineering, Anna University for his work on wireless communication, adhoc and sensor networks.
RESEARCH, TEACHING, or OTHER INTERESTS
Engineering, General Engineering
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Surender Ragunathan and Dananjayan Perumal
Springer Science and Business Media LLC
Surender Ragunathan and Dananjayan Perumal
Springer Science and Business Media LLC
Surender Ragunathan and Dananjayan Perumal
Springer Science and Business Media LLC
Kumar. K, Ashok, P Dananjayan, and Karunakar Reddy Vanga
International Hellenic University
S. Fouziya Sulthana and R. Nakkeeran
Inderscience Publishers
Mohanraj S. and Dananjayan P.
IEEE
Generalised Frequency Division Multiplexing (GFDM) is one of the strong prominent candidate waveforms for the 5G cellular systems. Since high data rate, efficient spectral usage, affordable delay, minimum level of OOB emissions and reasonable implementation complexities are the requirements of the 5G network. Generally, in GFDM the effect of interference will be more due to non-orthogonality nature so ICI and ISI will have more severe effects in the system. In our work an iterative method for interference cancellation scheme in receiver is studied for mitigating the interference without the penalty power and to improve the accuracy of channel estimation a new technique is adopted called Compressive Sensing (CS) technology. Simulated inferenceindicates that the suggested GFDM system hasmore efficientestimationaccuracy and the graphs were plotted.
R. Shankar and P. Danajayan
Universitas Ahmad Dahlan
Integration of Universal Mobile Telecommunications System (UMTS) and Wireless Local Area Network (WLAN) result in ubiquitous connection for end users. In the integrated network, ensuring the quality of service to users and enhancing capacity of network are prominent issues. Bandwidth adaptation technique is one of the solutions to overcome these issues. Bandwidth adaptation based on per flow and per class schemes were proposed for loosely coupled interworking network. In this paper, hybrid coupled UMTS and WLAN interworking network is analyzed with bandwidth adaptation based on per flow and per class schemes and the performances have been compared. Simulation result shows that the proposed hybrid coupled interworking network with bandwidth adaptation based on per class scheme performs better with enhanced quality of service and network capacity.
S Mohanraj and P Dananjayan
IEEE
Future 5G wireless applications require improved data rate, low delay, efficient usage of spectrum, reduced out of band emissions (OOB) and implementation complexities. Generalized Frequency Division Multiplexing (GFDM) is one of the new 5G carrier waveform candidate which meets the 5G applications requirements nicely when matched with Orthogonal Frequency Division Multiplexing (OFDM). However, the GFDM has some disadvantages such as Inter-Symbol Interference (ISI), Inter-Carrier Interference (ICI) and implementation complexities. It’s not possible to obtain a reliable communication with GFDM signal which has more severe effects on interferences and noises. To eliminate interference in communication system local DGT algorithms were used with proposed new type of prototype filtering. The proposed filtering will have separate filters for odd subcarriers and even subcarriers respectively. It introduces the orthogonality conditions which will be used to get rid of interferences in the communication systems. Simulation results shows that the suggested GFDM system has better BER performance when compared to the traditional GFDM system. In future we can directly apply some channel estimation algorithms and different MIMO antenna configurations in the modified GFDM system for improved performances.
Surender Ragunathan and P. Dananjayan
IEEE
Fifth generation wireless communication aims at providing high data rate for long range signal transmission consuming high power in the network. The increase of power must be proficient considering the limitation of the interference without demolishing the quality of service in the network. This work can be analyzed by densifying the network using Massive MIMO with small cell access where maximum sum rate can be achieved. The work in this paper aims at providing better QoS by minimizing the total power and maximizing the sum rate in the heterogeneous network deployed with maximal ratio transmission beamforming technique. The simulation results of maximal ratio transmission prove that better sum rate can be achieved at the penalty of power consumption and it is compared with that of existing regularized zero forcing.
A. Sharmila and P. Dananjayan
IEEE
Cognitive radio network (CRN) is considered a plausible way out for future 5G applications through its dynamic spectrum access technology. Spectrum sharing being the main objective of CRN, it alleviates the spectrum scarcity problem. In this paper, the manifold techniques for spectrum sharing in CRN are outlined. The distinct advantages and major limiting constraints with relevant to the hybrid spectrum access technology are elaborated thoroughly to enhance the QoS parameters of the users and to achieve better spectral efficiency.
Siva Kanakala, K Ashok Kumar, and P Dananjayan
IEEE
The scaling of technology decreases the communication issues between components in the System on Chip (SoC). Network on Chip (NoC) has the new architecture to deal with the overheads of communication and it is build with routers and processing elements. The router of NoC is temporarily and/or permanently disabled due to the occurrence of faults. A disabled router gives severe impact on the entire system hence the correction of faults is curial not only for single router but also entire NoC system. A Modified Hamming Code (MHC) is presented for detection and correction transient faults. The encoded data input is categorized in groups and each MHC is applied to each group parallelly there by provides high reliability of this method. The simulation results prove that MHC yields reduced latency and increased speed when compared to conventional Hamming Code (HC).
Surender Ragunathan, Sathian Dananjayan, and Dananjayan Perumal
IEEE
Wireless system characterized by multipath fading can be disregarded by Massive multiple input multiple output (MIMO) a promising candidate for enhancing energy efficiency in wireless network. The energy efficiency can be realized by zero forcing (ZF) linear processing scheme for fixed power consumption in the massive MIMO network. The channel is estimated in imperfect channel state information (CSI) with K user equipment and M base station in a symmetric multicell scenario with different reuse pattern across cells. The simulation results prove that ZF inheritance performs optimally and it is compared to that of conventional ZF system.
R. Jayashri, S. Sujatha, and P. Dananjayan
IEEE
OFDM in wireless communication due to its high data rate and mitigation of the interference at the receiver side it done a great breakthrough. In this technique, orthogonality is the key method for its greater advantage. But if this orthogonality fails, the signals will get added up and results in high crest value this called as PAPR problem. In the proposed work, CMA and IDCT blocks are used to reduce the correlation which leads to redution of PAPR. The proposed work reduces PAPR effectively and results have been obtained for different subcarriers.
K Ashok Kumar and P Dananjayan
IEEE
Orthogonal codes are majorly crucial for code division multiple access (CDMA) for suppressing the multiple access interference (MAI). The Walsh based orthogonal codes are used for data transmission in on-chip communication because of cross correction is zero between adjacent sequences. Though, the code utilization is less of Walsh based codes when compared with Pseudo-random noise (PN) sequences. To provide better code utilization with orthogonality, an orthogonal gold code is proposed in this paper thereby the orthogonal gold code is used for large size of on-chip communication architecture. These codes are suitable for CDMA and show better code utilization than the Walsh based orthogonal codes. For implementation, the Xilinx 14.7 software with Vertex-6 FPGA and is used and simulations of 32-bit are experimented in MATLAB thereby the crosscorrelation performance improved than Walsh based orthogonal codes.
Ashok Kumar.K and Dananjayan. P
Science Publishing Corporation
When technology is scaling down, reliability and power issues are arise in the intercommunication of System on Chip (SoC). The intercommunication links are suffers with various noise sources like crosstalk, temperature variation and voltage deflection which lead to communication link failure. To get reliable system, the strong error detection and correction codes are required. In this proposed work, Crosstalk avoidance code detects and corrects of one bit error, two bit error and some of three bit errors. The Hybrid Automatic Re-transmission Request is also used when the CAC detects the burst error of three. Apart from this, the Low Power Codes are used to get low power consumption using Bus Invert (BI) technique in proposed work. The LPC code reduces the power consumption of interconnection wires using reducing switching activity. The performance of proposed work evaluated in Xilinx 14.7 in Vertex-6 Field Programmable Gated Array (FPGA) device. The proposed work is calculated of power consumption of codec module and interconnection wire, delay of CAC and LPC code and link swing voltage. This work provides 11.7% improvement in power consumption and presents high reliability than JTEC. The energy dissipation of wires in the proposed work is decreased 23.5% than un-coded schemes.
K. Ashok Kumar and P Dananjayan
American Scientific Publishers
R. Jayashri, S. Sujatha, and P. Dananjayan
IEEE
One of the high data rate wireless technology is MIMO OFDM which employs multiple subcarriers for parallel transmission. At the transmitter side, the orthogonal subcarriers are produced using IFFT block. These orthogonal subcarriers helps to overcome ISI and ICI, it provides better spectral efficiency, etc. But if orthogonal property is not maintained properly among subcarriers it leads to Peak to Average Power (PAPR) problem. This problem causes inefficient amplification and requires expensive transmitter. In this paper PAPR is reduced by a statistical technique called modified Partial Transmit sequence which employs DCT and helical interleaver before it. Here DCT and interleaver is used to reduce the similarity among data bits. The simulation result shows that the proposed methods reduces PAPR compared to conventional PTS technique.
S. Sujatha and P. Dananjayan
IEEE
Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) is a most enthralling technology which has been recently proposed in wireless communication. It provides high data rate services and offer better system performances. It improves data throughput and delivers highest capacity as well. However, MIMO-OFDM suffers with the disadvantage of high peak-to-average power ratio (PAPR) for the large number of subcarriers which can effect the system output. Therefore, to overcome the problem of high PAPR in OFDM systems, an effective technique called Modified selective mapping (SLM) is used along with Inverse Discrete Cosine Transform (IDCT) matrix combined with interleaving and pulse shaping to reduce the peak-to-average power ratio on both transmitter and receiver sides. By simulation results, it is seen that the proposed technique reduces PAPR.
Sundhar Arumugam and Dananjayan Perumal
IEEE
Wireless multimedia communications are playing important roles in the emerging communication system, which require effective transmission with resource access for providing diverse Quality of Services (QoS) to accommodate variety of services like multimedia and bursty traffic. MCCDMA-MIMO, Multi Carrier Code Division Multiple Access (MC-CDMA) technique with spatial diversity and spatial multiplexing scheme of multiple-input and multiple-output (MIMO) has drawn significant interest for the future generation networks due to its ability of multiple access and spectral efficiency. The adaptive modulation is a promising concept to provide a wide variety of communication services such as video, teleconferencing, internet access and real time multimedia services. However, the network of adaptive modulation based MCCDMA-MIMO system has limited throughput performance due to the simultaneous transmissions over sub carriers and non identical fading nature. The power control, sub carrier grouping and adaptive transmission technique is one of the open solutions for QoS enhancement in MCCDMA-MIMO system. In this paper, the water filling game theory is adopted to allocate proper power for every sub-channel and subcarrier group assignment strategy for mitigating interference noise and M-QAM based adaptive modulation is followed for transmission scheme to attain users QoS demands.
S. Sujatha and P. Dananjayan
IEEE
The advancement in 4G technology mainly depends upon the Orthogonal Frequency Division Multiplexing (OFDM) scheme. OFDM scheme has much betterment like efficient spectrum usage, mitigation of selective fading effects, reduces ICI and ISI, etc. The major disadvantage of this scheme is a high peak to average power ratio (PAPR) which requires a costlier high power amplifier for processing. Partial Transmit Sequence is solitary for intricacy the PAPR reduction techniques. The proposed technique employs interleaving with both PTS and modified PTS with the discrete cosine transform (DCT) in OFDM system. The modified PTS method reduces the computation intricacy of the system. The simulation results shows that the proposed method gives better performance compared to the conventional techniques.
M. Thanigasalam and P. Dananjayan
Inderscience Publishers
Modified partial transmit sequence PTS technique with adjacent partitioning and four phase factors is implemented to enhance the PAPR performance of OFDM system and its PAPR reduction performance is evaluated in terms of the complementary cumulative distribution function CCDF. A multipath fading environment is considered and the performance of the OFDM receiver is evaluated using least square LS and minimum mean square error MMSE channel estimation methods. The performance of the receiver is evaluated in terms of mean square error MSE and bit error rate BER. The performance of the OFDM receiver is enhanced with PAPR reduction.
P. Raja and P. Dananjayan
Wireless sensor network WSN plays a major role in collecting information from different locations using battery powered sensor nodes in order to forward it to the sink node. The main limitation of the sensor nodes or motes is the limited energy resource. Hence, the efficient routing algorithm is one of the key challenges that need to be addressed for extending the lifetime of the network. In this paper, an efficient cluster-based routing protocol called efficient energy consumption protocol EECP is proposed which involves fixed clusters and randomised weighted algorithm for cluster head selection to reduce the energy consumption. Game theory is used to select healthier cluster-heads with sufficient residual energy. EECP uses the game theory concept during multi-hop transfer of data to sink node without any loss of data during the hopping process. The simulation results show that EECP with game performs better than energy aware routing protocol EARP and a novel clustering algorithm for energy efficiency ANCAEE on the basis of network lifetime.
M. Thanigasalam and P. Dananjayan
IEEE
Orthogonal Frequency Division Multiplexing (OFDM) is a multicarrier modulation technique. It supports high data rates over wireless radio channels. Due to high peak-to-average power ratio, OFDM is sensitive to the non-linear effects of the power amplifier. So, many methods of PAPR reduction techniques have been proposed. Of these, the distortionless method of PAPR reduction is Partial Transmit Sequence (PTS) technique. But this method suffers from high computational complexity. Modified PTS technique has been proposed to address the issue of high computational complexity. Modified PTS technique adopts a neighbourhood search algorithm to find the optimum set of phase factors. In this paper, the performance the OFDM system by using modified PTS technique combined with interleaving and pulse shaping is evaluated by employing Least Square (LS) and Minimum Mean Square Error (MMSE) channel estimation methods. Mean Square Error (MSE) and Bit error rate (BER) are the performance measures that are employed to analyse the performance of the OFDM system. The simulation result shows that the performance of OFDM system improves with PAPR reduction.