conf 2.pptx a review of linearization in ofdm

conf 2.pptx a review of linearization in ofdm

1. A review of linearization methods in OFDM signal transmitters with emphasis on the importance of class AB amplifier design By: Mahmood Abdul Kareem AL-Husseini Supervisor :Dr. Atefeh Salimi

2.  Introduction Brief overview of the importance of power amplifier linearity and efficiency in telecommunication systems. Mention the use of high transmission rate modulations and their impact on power amplifier design.

3. Linearization Methods Discuss different linearization methods, such as the Doherty power amplifier and the Posh follower structure. Highlight the challenges associated with power amplifier linearity and efficiency.

4. Class AB Amplifier Design Explain the design of a class AB amplifier with a telescopic structure and cascade compensator. Emphasize the importance of achieving high bandwidth, low output resistance, and the ability to drive high output current with the lowest power consumption.

5. Hybrid Modulator Introduce the hybrid modulator as a combination of class AB linear amplifier and class D switching high efficiency amplifier. Discuss the challenges and trade-offs in the design of a hybrid modulator.

6. Op-Amp Specifications Present the specifications for an op-amp designed for the push modulator, including low output resistance, rail-to-rail operation, and large bandwidth.

7. Simulation Results Provide an overview of the simulation results related to the effect of capacitor C1 on the bandwidth and quality factor Q. Discuss the implications of the simulation results for the design of the push modulator.

8. Conclusion Summarize the key points discussed in the presentation, emphasizing the importance of linearization methods and amplifier design in high PAPR signal applications.

9. summary  The design of a class AB amplifier resulting in a bandwidth of approximately 310 MHz with a phase margin of 60 degrees and a high PSRR value of -110 dB with a bandwidth of 6.338 KHz. These findings demonstrate the feasibility of the proposed design for high PAPR signal applications, emphasizing the importance of advanced linearization methods and amplifier design in meeting the stringent requirements of modern telecommunication systems