scholarly journals Performance Research on Variable Data Rate Reconfigurable Architecture for SDR Receiver

2019 ◽  
Vol 8 (2S8) ◽  
pp. 1008-1011
Keyword(s):  
Software Defined Radio ◽  
Data Rate ◽  
Reconfigurable Architecture ◽  
Bandwidth Efficiency ◽  
High Data ◽  
Modulation And Demodulation ◽  
Data Rates ◽  
Modulation Schemes ◽  
Variable Data ◽  
Amplitude And Frequency Modulation

In Early days, communications systems used amplitude and frequency modulation schemes in which bandwidth constraint is one of the major challenge to accommodate more data rates. As the data rate requirement increased drastically till date, The applications demands more data rates for communication using less bandwidth is considered as an efficient communication system. For achieving communication with high data rates using less bandwidth, technology migrated to digital modulation schemes. In this phase new modulation techniques like ASK, FSK, PSK were realised. ASK and FSK modulation schemes bandwidth efficiency is less as compared to PSK schemes. For best utilisation of bandwidth efficiency and less inherent noise levels, PSK schemes are used, which is suitable for high data rate applications. In this paper QPSK modulation and demodulation technique is selected for realising the variable data rate in the range of 1.2MBPS as the best bandwidth with efficient reconfigurable architecture designed for software defined radio receiver.

THREE DIMENSIONAL FLASH LADAR FOCAL PLANES AND TIME DEPENDENT IMAGING

2008 ◽  
Vol 18 (02) ◽  
pp. 401-406 ◽  
Author(s):  
ROGER STETTNER ◽  
HOWARD BAILEY ◽  
STEVEN SILVERMAN
Keyword(s):  
Three Dimensional ◽  
Data Rate ◽  
Flight Time ◽  
Time Dependent ◽  
High Data Rate ◽  
Time Dynamic ◽  
High Data ◽  
Data Rates ◽  
Topographical Mapping ◽  
Time Required

3-D flash ladar, herein defined as obtaining an entire frame of 3-D ladar data with one laser pulse, is an emerging technology with a number of advantages over conventional point scanner systems. Probably the most obvious advantage is the higher data rates possible and the potential for much higher data rates with increases in the associated 3-D focal planes array (FPA) format. High data rate means that topographical mapping, for example, can be obtained more rapidly decreasing the amount of flight time required. This paper investigates the clear but perhaps not-so-intuitive use of the high data rate: time dependent 3-D movies can be acquired at the repetition frequency of the associated laser. Data is taken using 3-D flash ladar cameras fabricated by Advanced Scientific Concepts, Inc. The paper concludes that there are a number of advantages and unique applications of the time dynamic 3-D flash ladar, including 3-D collision avoidance and object tracking.

A MAC Protocol for Terahertz Ultra-High Data-Rate Wireless Networks

2013 ◽  
Vol 427-429 ◽  
pp. 2864-2869
Author(s):  
Zhi Ren ◽  
Ya Nan Cao ◽  
Shuang Peng ◽  
Hong Jiang Lei
Keyword(s):  
Wireless Networks ◽  
Electromagnetic Waves ◽  
Mac Protocol ◽  
Terahertz Wave ◽  
Data Rate ◽  
High Data Rate ◽  
Control Mechanisms ◽  
High Data ◽  
Large Bandwidth ◽  
Data Rates

The terahertz wave is a kind of electromagnetic waves which locates between millimeter waves and infrared lightwaves, and the frequency range is 0.14THz~10THz. Terahertz is used as a carrier wave to communicate with each other because it has large bandwidth which can support Gbps wireless data rates. Therefore, terahertz communication technologies become research hot spots in recent years. However, its still rare in MAC protocol of terahertz ultra-high data-rate wireless networks at present. In order to realize wireless access of ultra-high data-rate under the condition of terahertz carrier frequency, a novel MAC protocol is proposed in this paper. The improved MAC protocol which makes the maximum data rates reach up to 10Gbps or higher is designed by new MAC control mechanisms, new time-slots allocation schemes and new superframe structure. Theoretical analysis and simulation results show that the new proposed MAC protocol of terahertz ultra-high data-rate wireless networks can operation normally, and the maximum data rate can reach up to 19.2Gbps. This maximum data rate is 2 times higher than 5.78 Gbps which IEEE 802.15.3c can achieve.

Joint Partial Crosstalk Cancellation and Spectrum Management for xDSL Systems with Data Rate Constraints

Frequenz ◽  
2012 ◽  
Vol 66 (5-6) ◽  
Author(s):  
Monique Düngen
Keyword(s):  
Computational Complexity ◽  
Service Providers ◽  
Selection Procedure ◽  
Spectrum Management ◽  
Data Rate ◽  
High Rate ◽  
High Data ◽  
Data Rates ◽  
Crosstalk Cancellation ◽  
Water Filling

AbstractxDSL systems have to be able to support an always increasing amount of high-rate applications. To make the applications run stably, service providers need to be capable of guaranteeing these high data rates to their customers at a limited amount of available computational complexity usable for crosstalk cancellation.In order to be able to support high data rate targets with a low amount of computational complexity, partial crosstalk cancellation was combined with spectrum management techniques. A selection procedure was found, which jointly chooses the canceled crosstalkers and the transmit powers for each user on each tone by interlacing Iterative Water Filling (IWF) and a newly developed successive crosstalk selection algorithm for partial crosstalk cancellation, which takes into account the data rate requirements of the users. It distributes the available computational complexity in an intelligent way, so that data rate requirements are fulfilled. With the joint procedure savings in computational complexity are achieved.

scholarly journals Design of a Scalable 4G Portable Network Using Low Cost SDR And Raspberry Pi

2021 ◽  
Vol 20 ◽  
pp. 118-122
Author(s):  
Nupur Choudhury ◽  
Chinmoy Kalita ◽  
Kandarpa Kumar Sarma
Keyword(s):  
Software Defined Radio ◽  
Low Cost ◽  
Effective Means ◽  
Data Rate ◽  
High Data Rate ◽  
Raspberry Pi ◽  
High Data ◽  
Pi Systems ◽  
Late Software ◽  
4G Wireless

Of late, Software Defined Radio (SDR) approach has become an effective means to design high data rate wireless systems for a range of applications. There are methods with which low cost SDR based 4th generation (4G) or long term evolution (LTE) systems can be designed. Using low cost Raspberry Pi systems, the SDR aided 4G systems can be designed for high data rate communication. The work is related to the design of a 4G wireless system using low cost SDR solutions and integrated to a programmable controller based on a Raspberry Pi. Experimental results show that the system is effective in a range of conditions

scholarly journals Improvement of bit error rate performance of MC-CDMA system by using adaptive digital modulation schemes

2018 ◽  
Vol 7 (3.3) ◽  
pp. 663
Author(s):  
Jaya T ◽  
M Monisha ◽  
M Meena ◽  
C Sharanya
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Adaptive Modulation ◽  
Data Rate ◽  
High Data Rate ◽  
Cdma System ◽  
Digital Modulation ◽  
High Data ◽  
Cdma Systems ◽  
Modulation Schemes

In Wireless Communication, the transmission channel suffers due to multipath propagation and channel dispersion due to Inter Symbol Interference (ISI), thereby degrades the system performance greatly. Future communication requires high data rate and effective utilization of bandwidth. Hence, there is a need to improve the Bit Error Rate (BER). The proposed work is Adaptive Modulation (AM), combined with Multi Carrier Code Division Multiple Access (MC-CDMA) based transmission system. It is a promising way to increase the data rate and it uses bandwidth in a efficient manner. The Adaptive Modulation based MC-CDMA systems applied to a wide-area environment, can achieve high data rate up to 100Mbps. In this paper M-ary PSK, M-ary QAM and M-ary CPM modulation techniques are used. The Adap-tive modulation based MC-CDMA systems perform well for around 10 number of users. As a whole, the adaptive MC-CDMA system is found to give the optimum BER performance of given digital modulation schemes for fourth generation environment.  

scholarly journals Mitigation of Phase Noise and Nonlinearities for High Capacity Radio-over-Fiber Links

Electronics ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 345 ◽  
Author(s):  
Muhammad Kamal Asif Khan ◽  
Farman Ali ◽  
Muhammad Irfan ◽  
Fazal Muhammad ◽  
Faisal Althobiani ◽  
...  
Keyword(s):  
Phase Noise ◽  
Communication Networks ◽  
Wavelength Division Multiplexing ◽  
Radio Over Fiber ◽  
High Data ◽  
Ofdm Modulation ◽  
Data Rates ◽  
Modulation Schemes ◽  
High Data Rates ◽  
Bandwidth Capacity

Radio-over-fiber (RoF) links successfully provide high data rates and bandwidth capacity with a low complexity system architecture, as compared to its counterpart digital-RoF. In addition, the compound of quadrature amplitude modulation (QAM) and orthogonal frequency division multiplexed (OFDM) modulation schemes further enhance the process of these achievements. However, high data rates and bandwidth-capacity-supported RoF links face nonlinearities (NLs), linear distortions (LDs), and phase noise challenges that degrade the reliability of communication networks (CNs). Therefore, in this paper, to suppress NLs, LDs, and phase noise, next generation cloud radio access networks (CRANs) are investigated using RoF links and wavelength division multiplexing (WDM) methodology based on 16, 32, and 64 QAM-OFDM modulation schemes. The receiver of the proposed framework is designed, applying an improved digital signal processing (DSP) system that includes overlap frequency domain equalization (OFDE), a synchronization process, and time domain equalization (TDE). Theoretical and simulation models are organized for estimating the proposed RoF link with the aid of different values of transmission ranges, input power, output power, bit rate, bits per symbol, channel spacing, and the number of users. The fitness of the model matches that of existing approaches.

scholarly journals Performance Analysis of 5G Stand Alone Inter-band Carrier Aggregation

2021 ◽  
pp. 492-499
Author(s):  
Alfin Hikmaturokhman ◽  
◽  
Levina Anora, Solichah Larasati ◽  
Ari Sukarno ◽  
Rizky Syafrullah ◽  
...  
Keyword(s):  
Support Services ◽  
Industrial Area ◽  
Data Rate ◽  
Line Of Sight ◽  
Carrier Aggregation ◽  
High Data ◽  
New Radio ◽  
Data Rates ◽  
Aggregation Techniques ◽  
5G Network

Today, high data rate is the prior requirement to support services and applications. It is definitely a challenge for the 5G New Radio (NR) in providing high data rates, in order to support use cases, especially enhanced Mobile Broadband (eMBB). The objective of this research is to design a 5G network which has greater data rates employing carrier aggregation techniques. Carrier Aggregation (CA) is a way which is able to improve data rates by aggregate component carriers, hence, it can make a wider bandwidth. There are three modes of CA scenario that can be used: intra-band contiguous CA, intra-band non-contiguous CA, and inter-band noncontiguous CA. In this research, the 5G network planning with carrier aggregation on inter-band employing bandwidth 40 MHz at frequency 2300 MHz and bandwidth 100 MHz at frequency 3500 MHz was simulated in Mentum Planet software. The simulation implemented at Marunda Center Industrial Area in Bekasi used downlink outdoor-to-indoor (O2I) with Line of Sight (LOS) scenario. The parameters analyzed in this research employed three main parameters: SS-RSRP, SS-SINR and data rate, which resulted CA SS-RSRP increased by 0.14%, SSSINR increased by 4.48%, and peak data rate increased up to 1412.26 Mbps from 312.872 Mbps

scholarly journals Dynamic Link Adaptation For Filterband Multicarrier In Networks With Diverse Service Quality And Throughput Requirements

2021 ◽  
Author(s):  
Amna Javed Tiwana ◽  
Muhammad Zeeshan ◽  
Tabinda Ashraf ◽  
Muhammad Umar Farooq ◽  
Kashif Shahzad ◽  
...  
Keyword(s):  
Service Quality ◽  
Orthogonal Frequency Division Multiplexing ◽  
Link Adaptation ◽  
Multipath Fading ◽  
Data Rate ◽  
Adaptation Algorithm ◽  
High Data ◽  
Transmission Parameters ◽  
Data Rates ◽  
Channel Conditions

Abstract The fast evolution in wireless communication standards and enhancement in cellular applications has created an exponential rise in the data rate requirement over the past few decades. The next generation wireless standards, therefore, need not only to provide ultra high data rates with minimum latency, but also to support diverse quality-of-service (QoS) requirements. Filterbank multicarrier (FBMC) scheme provides quite a few advantages over the conventional orthogonal frequency division multiplexing (OFDM) for future wire- less networks. In order to achieve adaptive throughput and diverse service quality requirements under varying channel conditions, a link adaptation algorithm for FBMC scheme is proposed in this paper. The aim is to provide the dynamic selection of optimum parameters resulting in diverse modes of operation to ensure the desired and/or best available communication service quality. The proposed link adaptation algorithm incorporates the parameters of required data rate, available channel condition and QoS demand, and dynamically allocates the appropriate FBMC transmission parameters. The proposed scheme has been evaluated for AWGN as well as multipath fading SUI channel models. Simulation results indicate that the proposed algorithm successfully achieves the desired service quality subject to the availability of suitable channel conditions and is also superior to the existing algorithms in terms of block error rate and effective throughput.

scholarly journals Study the Effect of Spreading Factor value on the Performance of Chaotic Modulation Schemes

2018 ◽  
pp. 43-51
Keyword(s):  
Communication Systems ◽  
Wireless Systems ◽  
Chaotic Signal ◽  
Bandwidth Efficiency ◽  
Initial Condition ◽  
Spreading Factor ◽  
High Data ◽  
Shift Keying ◽  
Modulation Schemes ◽  
Chaotic Modulation

High data rate and bandwidth efficiency are the requirements of modern wireless systems. Most studies introduce different ways to develop communication systems to meet these requirements. The researches in the last few years focused on the chaotic system as a chaotic modulation due to its nature. So that the performances of various chaotic modulation schemes (Initial Condition Modulation (ICM) and Chaotic Shift Keying (CSK)) in terms of bit error rate (BER), for different spreading factors are implemented in this article and simulated using MATLAB 2016b simulation. The main objective of this paper is to make a comparison of various chaotic modulation schemes under AWGN channel and study the effect of the spreading factor (β) on the performance of different chaotic modulation schemes, where the spreading factor (β) is the number of generated chaotic signal samples during the bit period (Tb). Different values of spreading factor (12,16, 20, 40, 60, 80, and 100) samples are selected to implement various chaotic modulation schemes. The results show that the spreading factor value of (100) achieves good performance for all types of chaotic modulation schemes which are implemented here. Increasing the value of spreading factor over (100) such as (120, 140, and 180) will add a little bit enhancement to the system, whilst the processing time will increase dramatically.

scholarly journals Energy consumption study of channel access modes and modulation schemes of the 2.4 GHz narrowband IEEE 802.15.6

2021 ◽  
Vol 22 (3) ◽  
pp. 1505
Author(s):  
Marwa Boumaiz ◽  
Mohammed El Ghazi ◽  
Mohammed Fattah ◽  
Anas Bouayad ◽  
Moulhime El Bekkali
Keyword(s):  
Energy Consumption ◽  
Data Rate ◽  
Line Of Sight ◽  
Area Network ◽  
Channel Access ◽  
Phase Shift Keying ◽  
Body Area ◽  
High Data ◽  
Shift Keying ◽  
Modulation Schemes

Energy efficiency is an important challenge for wireless body area networks. Therefore, choosing the channel access modes and modulation schemes that guarantee lower energy consumption is necessary to increase the network lifetime, especially in <em>wireless body area network</em> (WBAN) medical applications. The purpose of this paper is to analyze the network energy consumption in on-body medical applications (which are classified as low data rate, medium data rate, and high data rate applications) for two channel access mechanisms: random and scheduled access modes, and two modulation schemes: differential quadrature phase shift keying (DQPSK) and differential binary phase shift keying (DBPSK), which are supported by the 2.4 GHz band of the Institute of Electrical and Electronics Engineers (IEEE) 802.15.6 standard. The considered on-<em>body </em>area network (BAN) of the study supports two communication scenarios: the line-of-sight transmission and the non-line-of-sight communications, referenced as CM3A and CM3B path loss models respectively. Simulation results have demonstrated that the scheduled access mode based on time-division multiple access (TDMA), and DQPSK are the optimal choices to be made at the media access control (MAC) and physical layer levels respectively, in terms of energy efficiency, in low, medium, and high data rate on-body WBAN applications.

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