Decision feedback data detection in frequency domain for single carrier cyclic prefix assisted CDMA systems: A sequential quadratic programming approach

2009 ◽  
Vol 19 (4) ◽  
pp. 678-692 ◽  
Author(s):  
A.S. Madhukumar ◽  
Kai Yang ◽  
Francois Chin ◽  
A.B. Premkumar
Keyword(s):  
Quadratic Programming ◽  
Frequency Domain ◽  
Sequential Quadratic Programming ◽  
Cyclic Prefix ◽  
Decision Feedback ◽  
Programming Approach ◽  
Data Detection ◽  
Single Carrier ◽  
Cdma Systems ◽  
Feedback Data

scholarly journals Research on single carrier frequency domain equalization system based on FQPSK modulation

2018 ◽  
Vol 17 ◽  
pp. 03012
Author(s):  
Meng Zhang ◽  
Zhisong Bie
Keyword(s):  
Frequency Domain ◽  
Carrier Frequency ◽  
Viterbi Algorithm ◽  
Cyclic Prefix ◽  
Phase Shift Keying ◽  
Frequency Domain Equalization ◽  
Single Carrier ◽  
High Power Amplifier ◽  
Quadrature Phase ◽  
Shift Keying

Feher-patented quadrature phase shift keying (fqpsk) modulation is proposed for single-carrier frequency domain equalization (sc-fde). this paper puts forward a new method modulation called cc-bcd-fqpsk. the fqpsk signal is oversampled to make that the discrete fourier transform (dft)/ inverse dft (idft) processing of it can be applied for sc-fde. the methodology for maintaining waveform continuity with a cyclic prefix (cp) is presented. wrap-around viterbi algorithm (wava) is suggested for demodulation after equalization at the receiver. simulation results show that sc-fde system based on cc-bcd-fqpsk modulation has higher spectral efficiency than linear modulation qpsk and is an effective approach for eliminating isi and using nonlinear high power amplifier.

Optimization-based transient control of turbofan engines: a sequential quadratic programming approach

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Jiqiang Wang ◽  
Huan Hu ◽  
Weicun Zhang ◽  
Zhongzhi Hu
Keyword(s):  
Quadratic Programming ◽  
Sequential Quadratic Programming ◽  
Programming Approach ◽  
Evolutionary Computations ◽  
Turbofan Engines ◽  
Flight Envelope ◽  
Transient Control ◽  
Limit Protection ◽  
Computational Resources ◽  
Design Guidance

Abstract Engine transient control has been challenging due to its stringent requirements from both performance and safety. Many methodologies have been proposed such as conventional schedule-based methods, linear parameter varying, multiobjective optimization and evolutionary computations etc. These approaches have been well-established and led to a series of significant results. However, they are either not providing limit protection or requiring exhaustive computational resources, particularly when generating results into full flight envelope applications. Consequently a compromise between limit protection and computational complexity is necessitated. This note considers a sequential quadratic programming (SQP)-based method for full flight envelope investigations. The proposed method can provide important design guidance and the corresponding claims are validated through detailed analysis and simulations.

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