{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

OFDMA_Part13 - response of a power amplifier Operation in...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
13 [58], Schmidl and Cox build upon [57]’s approach and estimate the frequency offset with only one training block by forcing the first half of the training block to be identical to the second half of the training block. [18] exploits the repetitive property of the CP to jointly estimate the time- offset and the frequency-offset. 2.5 Techniques To Reduce PAPR The peak to average power ratio (PAPR) is a very important attribute of a communication system. A low PAPR allows the transmit power amplifier to operate efficiently, whereas a high PAPR forces the transmit power amplifier to have a large back-off in order to ensure linear amplification of the signal [15]. This is demonstrated in Figure 3_1 that shows the typical
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: response of a power amplifier. Operation in the linear region of this response is generally required to avoid signal distortion, so the peak value is constrained to be in this region. Clearly it would be desirable to have the average and peak values be as close together as possible in order to have the power amplifier operate at the maximum efficiency. Additionally, a high PAPR requires high resolution for the receiver ADC, since the dynamic range of the signal is much larger for high PAPR signals. High resolution ADCs place a complexity and power burden on the receiver front end. Figure 3_1. Typical Response of a Power Amplifier [15]...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern