scholarly journals Minimization of the Fading Effect in Indoor Wireless Communication using Coherent 16- Amplitude Phase Shift Keying with Regular Low Density Parity Check Code

2019 ◽  
Vol 7 (2) ◽  
Author(s):  
Wei Wei ◽  
Junghwan Kim
Keyword(s):  
Phase Shift ◽  
Wireless Communication ◽  
Low Density ◽  
Parity Check ◽  
Phase Shift Keying ◽  
Low Density Parity Check ◽  
Indoor Wireless ◽  
Shift Keying ◽  
Fading Effect ◽  
Indoor Wireless Communication

Performance Analysis of LDPC Coded SFH/BPSK in LFM Jamming

2013 ◽  
Vol 470 ◽  
pp. 748-752
Author(s):  
Jiong Li ◽  
Man Xi Wang ◽  
Dao Xing Guo ◽  
Xiao Fei Pan
Keyword(s):  
Code Rate ◽  
Low Density ◽  
Parity Check ◽  
Code Length ◽  
Phase Shift Keying ◽  
Rate Code ◽  
Low Density Parity Check ◽  
Shift Keying ◽  
Binary Phase Shift Keying ◽  
Slow Frequency

In this paper, we investigated the low density parity check (LDPC) coded performances of slow-frequency-hopped binary phase shift-keying (SFH/BPSK) systems in the presence linear frequency modulated (LFM) jamming. We investigated the effects of code rate, code length, the number of symbols per hop (SPH) and interleaver on the performance of the SFH/BPSK system with LFM jamming by numerical simulation. And the results suggest that there is good performance through designing the system reasonably.

scholarly journals Performance Enhancement of DS-CDMA System using Extended BPSK Modulation Scheme

2016 ◽  
Vol 4 (2) ◽  
pp. 172-180
Author(s):  
Barkha Pandey ◽  
Raghu Harsh Kalia ◽  
Monica Kaushik ◽  
Monika Arora
Keyword(s):  
Phase Shift ◽  
Wireless Communication ◽  
Spectrum Efficiency ◽  
Modulation Scheme ◽  
Cdma System ◽  
Phase Shift Keying ◽  
Binary Phase ◽  
Modulation Format ◽  
Shift Keying ◽  
Binary Phase Shift Keying

In a last few decades there has been tremendous growth and a drastic rise in wireless communication technologies. The major issue that the world is facing today with the advent of so many sophisticated wireless communication devices is efficient utilization of the spectrum. Spectrum efficiency comes together with a tradeoff factor of energy consumption. Thus, the need of the hour is an energy and bandwidth efficient technique. DS-CDMA is one of the competitive and most investigated technique in wireless communication which caters the large demand at the same time with limited bandwidth. Existing modulation techniques does not promise to provide better performance in case of higher noise. Therefore, one looks for a better BER stipulated modulation format to improve and enhance the performance of the system. This article revisits conventional Binary phase shift keying method and compares its performance in terms of BER with a special Extended Binary Phase Shift Keying (EBPSK) modulation format for a DS- CDMA system. EBPSK scheme is flexible and simple which is easily integrated in a network and assures improved and enhanced performance.

scholarly journals High modulated soliton power propagation interaction with optical fiber and optical wireless communication channels

2021 ◽  
Vol 21 (3) ◽  
pp. 1575
Author(s):  
Mahmoud M. A. Eid ◽  
Ashraf S. Seliem ◽  
Ahmed Nabih Zaki Rashed ◽  
Abd El-Naser A. Mohammed ◽  
Mohamed Yassin Ali ◽  
...  
Keyword(s):  
Phase Shift ◽  
Wireless Communication ◽  
Optical Fiber ◽  
Communication Channels ◽  
Optical Wireless Communication ◽  
Phase Shift Keying ◽  
Optical Wireless ◽  
Shift Keying ◽  
Modulation Schemes ◽  
Wireless Communication Channels

<p><span id="docs-internal-guid-52da184f-7fff-738a-f0e7-e8dd779e097b"><span>This paper has presented high modulated soliton power transmission interaction with optical fiber and optical wireless communication channels at flow rate of 40 Gbps and 20 km link range. The proposed modulation schemes are continuous phase frequency shift keying (CPFSK), Quadrature amplitude modulation (QAM), differential phase shift keying (DPSK), frequency shift keying (FSK), pulse amplitude modulation (PAM), minimum shift keying (MSK), and optical quadrature phase shift keying (OQPSK). CPFSK has presented better performance than other proposed modulation schemes for both optical fiber and optical wireless communication channels. The enhancement of optical signal/noise ratio at fiber/wireless channel, received electrical power and signal/noise ratio at optical receiver with increase of bits per symbol for different proposed modulation schemes except for CPFSK scheme. Therefore it is evident that CPFSK modulation scheme is more efficient and better performance than other modulation schemes for different communication channels. The obtained results are simulated with optisystem program version 13. </span></span></p>

Performance Analysis of LDPC Coded SFH/BPSK in Partial-Band Interference

2013 ◽  
Vol 443 ◽  
pp. 417-421
Author(s):  
Jiong Li ◽  
Dao Xing Guo ◽  
Chao Gong
Keyword(s):  
Error Probability ◽  
Code Rate ◽  
Parity Check ◽  
Code Length ◽  
Phase Shift Keying ◽  
Rate Code ◽  
Low Density Parity Check ◽  
Shift Keying ◽  
Binary Phase Shift Keying ◽  
Slow Frequency

In this paper, we investigated the low density parity check (LDPC) coded performances of slow-frequency-hopped binary phase shift-keying (SFH/BPSK) systems in the presence partial-band interference (PBI). The contributions of this paper are two folds. First, we give the bits error probability (BER) of the SFH/BPSK system with PBI by analysis, and further verify it by numerical results. Second, we investigated the effects of code rate, code length, the number of symbols per hop (SPH) and interleaver on the performance of the SFH/BPSK system with PBI by numerical simulation.

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