List of PPDUs Supported in 802.11ag
========================================


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        **What is a PPDU in IEEE 802.11a/g?**

        A PPDU is the Physical Layer Protocol Data Unit, the complete packet transmitted over the wireless medium.

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        **What are the main components of an 802.11a/g PPDU?**

        A PPDU consists of a preamble, a header, and a data payload.

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        **What is the purpose of the preamble in a PPDU?**

        It allows the receiver to synchronize timing and frequency and prepare for data decoding.

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        **How many preamble types are there in 802.11a/g?**

        The standard defines a short and a long preamble, with different lengths and complexity.

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        **What modulation does 802.11a/g use for the PPDU?**

        Orthogonal Frequency Division Multiplexing (OFDM) is used for modulating the PPDU.

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        **What is the PLCP header in the PPDU?**

        The Physical Layer Convergence Protocol header contains rate, length, and parity information for decoding.

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        **How is the data payload encoded in the PPDU?**

        Data is encoded using OFDM subcarriers, modulation schemes, and convolutional coding.

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        **What determines the length of a PPDU?**

        The length depends on the size of the MAC frame and the physical data rate selected.

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        **Can PPDUs have variable length?**

        Yes, PPDUs vary in length according to the frame size and transmission rate.

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        **What is the symbol duration in an 802.11a/g PPDU?**

        The OFDM symbol duration is 4 microseconds, including a 0.8 microsecond guard interval.

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        **How does the receiver decode a PPDU?**

        The receiver synchronizes with the preamble, reads the PLCP header, then demodulates the data payload.

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        **What error detection is used in PPDUs?**

        The MAC frame includes a CRC for error detection, and convolutional coding helps error correction.

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        **How are acknowledgments related to PPDUs?**

        Acknowledgment frames are sent as separate PPDUs to confirm successful data reception.

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        **Can multiple PPDUs be aggregated?**

        802.11a/g does not support frame aggregation; each PPDU carries a single MAC frame.

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        **What is the role of the service field in the PPDU?**

        The service field contains bits reserved for future use and to help with convolutional decoder initialization.

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        **How does modulation affect PPDU structure?**

        Modulation schemes (BPSK, QPSK, 16-QAM, 64-QAM) determine bits per symbol in the data payload.

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        **Are there differences in PPDU format between 802.11a and 802.11g?**

        The PPDU format is largely the same; 802.11g adds backward compatibility with 802.11b.

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        **How do PPDUs affect interoperability?**

        Standardized PPDU formats ensure devices from different vendors can communicate successfully.

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        **Can firmware updates impact PPDU handling?**

        Yes, updates can optimize timing, decoding algorithms, and error handling related to PPDUs.


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        Topics in this section,

                * :ref:`Learnings in this section <ppdu_step1>`

                * :ref:`Terminology <ppdu_step2>`

                * :ref:`Version Info <ppdu_step3>`

                * :ref:`ppdu Basic Setup on Ubuntu using IPv4 <ppdu_step18>`

                * :ref:`Reference links <ppdu_step17>`

.. _ppdu_step1:

.. tab-set::

    .. tab-item:: Learnings in this section

        * In this section, you are going to learn

.. _ppdu_step2:

.. tab-set::

    .. tab-item:: Terminology
        
       * Terminology


.. _ppdu_step3:

.. tab-set::

    .. tab-item:: Version Info
    
         * Version Info


.. _ppdu_step18:

.. tab-set::

    .. tab-item:: ppdu Basic Setup on Ubuntu using IPv4

       * setup


.. _ppdu_step17:

.. tab-set::

    .. tab-item:: Reference links
     
       * Reference links