Anti-jamming performance of adaptive chaos based CDMA system in flat fading environment with imperfect channel estimation

2017 ◽  
Vol 6 (3) ◽  
pp. 9
Author(s):  
Patel Meher Krishna ◽  
Berber Stevan M. ◽  
Sowerby Kevin W. ◽  
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...  
Keyword(s):  
Channel Estimation ◽  
Cdma System ◽  
Imperfect Channel Estimation ◽  
Flat Fading

scholarly journals Antijamming Performance of Adaptive Chaos Based CDMA System with MRC in Imperfect Channel Estimation Environment

2017 ◽  
Vol 2017 ◽  
pp. 1-5 ◽  
Author(s):  
Meher Krishna Patel ◽  
Stevan M. Berber ◽  
Kevin W. Sowerby
Keyword(s):  
Channel Estimation ◽  
Lms Algorithm ◽  
Maximal Ratio Combining ◽  
Cdma System ◽  
Least Mean Square ◽  
Probability Of Error ◽  
Imperfect Channel Estimation ◽  
Pilot Symbols ◽  
Flat Fading ◽  
Slow Switching

This paper presents the antijamming performance of adaptive multiuser DS-CDMA system using maximal ratio combining technique in slow switching pulse noise jammer. Complex flat fading channel coefficients are assumed to be unknown at the receiver. Pilot symbols are used to estimate the fading coefficients using least mean square (LMS) algorithm, and effect of imperfect channel estimation on bit error rate (BER) is studied. Under the perfect synchronization conditions, probability of error in closed form is derived.

scholarly journals Multiuser Detection and Channel Estimation for CDMA System under Flat Fading Channels

2020 ◽  
Vol 9 (4) ◽  
pp. 2884-2888
Keyword(s):  
Channel Estimation ◽  
Fading Channels ◽  
Multiuser Detection ◽  
Speech Signal ◽  
Code Division Multiple Access ◽  
Multiple Access ◽  
State Condition ◽  
Cdma System ◽  
Flat Fading ◽  
Code Division Multiple

For a level blurring code-division multiple access (CDMA), the numerous entrance framework is done by speech signal, and it shows the real framework by different conditions like comprising of state condition, multiplicative commotion condition , the nonlinear estimation condition, and an ideal separating calculation and these are used for joint recursive channel estimation and multi users separation. It ought to be focused on that the new calculation is pertinent to issues with a similar sort of nonlinear framework which shows that related commotions. Recreations process demonstrates that the new calculation performs are superior to the expanded Kalman channel estimation in faster merging rate and lower in bit mistake rate.

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