Enhancement in performance of DHTprecoding over WHT for EC companded OFDM in wireless networks

Narayana, A. Lakshmi; Prasad, Binod; Kapula, Prabhakara Rao; Prasad, Dumpa; Panigrahy, Asisa Kumar; Indira, D. N. V. S. L. S.

doi:10.1007/s13204-021-02016-x

Cited by 5 publications

(6 citation statements)

References 18 publications

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“…The gain as compared to previous structures is also higher which makes it suitable for indoor wireless communication. Many researchers have used various techniques to engineer the devices along with suitable antennas to accommodate for better performance [25][26][27][28][29][30][31][32][33][34].…”

Section: Resultsmentioning

confidence: 99%

A Beam Steering Dielectric Resonator Antenna Designed Using Rogers RO4003C Material for S-Band Applications

Kumari¹,

Rao²,

Jayakar³

et al. 2022

Advances in Materials Science and Engineering

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A pattern reconfigurable dielectric resonator antenna emitting at 3.1 GHz is presented in this study. The beam can be steered at 6 degrees, 8 degrees, 14 degrees, and 171 degrees. Three P-i-N diodes are employed in the slots of the ground plane to help steer the beam direction. By changing the state of the three diodes, five states can be obtained. The TE01δ mode is excited using a differential feed technique. Differential feed helps in increasing the gain and reducing the size of the structure. The return loss of each state is less than −25 dB. The gain of the first state is 7.65 dBi, the second and fifth state’s gain is 8.22 dBi, third and fourth state’s gain is 10.6 dBi. This Antenna is designed using Rogers RO4003C material which has low Electrical gravity, low voltage, and high oxidation resistance that makes it appropriate for RF applications. The properties required for RF microwave circuits, matching networks, and controlled impedance transmission lines are present in the RO4003C material. Annealed copper is used for designing the ground plane and feedline which provides excellent conductivity. The antenna is fabricated using the chemical etching process which employs a positive photoresist that gives a higher resolution accuracy for the designed antenna. This process of fabrication has another advantage of inculcating structures from simpler to complex.

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Section: Resultsmentioning

confidence: 99%

A Beam Steering Dielectric Resonator Antenna Designed Using Rogers RO4003C Material for S-Band Applications

Kumari¹,

Rao²,

Jayakar³

et al. 2022

Advances in Materials Science and Engineering

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“…This factorization will be repeated, and after log2N stages, the final stage will be denoted as (15): Since N is a power of two, after that ( 16) can be written in compact form as (17):…”

Section: Derivation Of the Algorithmmentioning

confidence: 99%

“…The importance of these transforms has prompted numerous researchers to use various techniques and methodologies, which have developed a wide variety of fast algorithms and novel transforms to solve current problems and challenges or satisfy the criteria of modern applications. One of the most effective approaches to creating new transforms is combining two orthogonal transforms to provide a realistic and cost-effective solution while retaining quality by benefiting from their unique advantages, besides exchanging resources [11]- [15].…”

Section: Introductionmentioning

confidence: 99%

“…Discrete Hartley transform (DHT) is a significant member of the orthogonal transformations family, representing an efficient tool for a wide range of applications [2], [4], [15]- [18]. The importance of DHT is due to its use as an alternative to the discrete Fourier transform (DFT) for real input; therefore, utilizing DHT achieves a significant increase in computing efficiency by saving arithmetic operations and memory storage.…”

Section: Introductionmentioning

confidence: 99%

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New fast Walsh–Hadamard–Hartley transform algorithm

Mardan

Hamood

2023

IJECE

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<span lang="EN-US">This paper presents an efficient fast Walsh–Hadamard–Hartley transform (FWHT) algorithm that incorporates the computation of the Walsh-Hadamard transform (WHT) with the discrete Hartley transform (DHT) into an orthogonal, unitary single fast transform possesses the block diagonal structure. The proposed algorithm is implemented in an integrated butterfly structure utilizing the sparse matrices factorization approach and the Kronecker (tensor) product technique, which proved a valuable and fast tool for developing and analyzing the proposed algorithm. The proposed approach was distinguished by ease of implementation and reduced computational complexity compared to previous algorithms, which were based on the concatenation of WHT and FHT by saving up to 3N-4 of real multiplication and 7.5N-10 of real addition.</span>

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“…The SU performs spectrum sensing to identify a region of interest with the goal of identifying any PU indicators to prevent impedance and distinguish the region's opportunity for optional access [9,10]. Many scientists have discovered how to sense the spectrum efficiently and without any dropouts.…”

Section: Introductionmentioning

confidence: 99%

Truncation Multiplier‐Based Cognitive Radio Spectrum Analyzer for Nanomedical Applications

Kumareshan¹,

Umashankar²,

Verma

et al. 2022

Journal of Nanomaterials

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The electromagnetic spectrum is one of nature’s meagre resources. The requirements of wireless communication cannot be satisfied by the new spectrum allocation plan. A policy of self-driven spectrum allocation results as a result. Cognitive radio (CR) engineering is a brilliant technique to maximise spectrum utilisation in rapidly changing environments by identifying unusable and underutilised bandwidth. One of the information strategies of intellectual radio is range detecting, which uses self-persuaded range allocation techniques to use open range to determine the existence of critical clients in the approved recurrence band. Energy location and cyclostationary highlight recognition are the two main factors that determine range detection. Energy recognition is a key method of range detection, but it becomes discouraging at low signal to noise ratios. With a cost of the highest degree of execution complexity, the critical cyclostationary highlight recognition based on cyclic range assessment may successfully identify weak signs from crucial clients. This project is aimed at implementing a useful range detecting mechanism in a field programmable door show with meticulous precision for CR. The adaptive absolute-self-coherent-restoral algorithm, specifically using the truncation multiplier, is a new spectrum sensing system. The proposed architecture, which makes use of a truncation multiplier, was created using the Xilinx approach. This study suggests an efficient spectrum sensing technique that makes use of the Adaptive Absolute Score (AAS) algorithm and SQRT-based Carry Select Adder (CSLA). The TM-CSLA design includes 228 LUT for the Spartan 6 device, which is fewer than the other architectures.

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Enhancement in performance of DHTprecoding over WHT for EC companded OFDM in wireless networks

Cited by 5 publications

References 18 publications

A Beam Steering Dielectric Resonator Antenna Designed Using Rogers RO4003C Material for S-Band Applications

A Beam Steering Dielectric Resonator Antenna Designed Using Rogers RO4003C Material for S-Band Applications

New fast Walsh–Hadamard–Hartley transform algorithm

Truncation Multiplier‐Based Cognitive Radio Spectrum Analyzer for Nanomedical Applications

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