L21 - Broadband wireless IEEE Standard 802.16. High rate...

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Broadband wireless IEEE Standard 802.16. High rate from network to/from home/office. Differences from 802.11 objectives: Non-mobile + 4G mobile, Fixed wireless Full Duplex Longer distances Support voice, television, streamed data services, more users. Show Old Fig. 4.31 Modified physical layer: new edition.
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Show new Fig. 4-30. Somewhat like old 4.32 Show new Fig. 4.31 Service specific sublayer is like logic link layer At the MAC sublayer, the base station controls all systems, channel management, downlink scheduling. Also partially manages uplink.
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802.16 Physical layer Many subcarriers in parallel, somewhat like in ADSL, except the subcarriers can be spaced more tightly in the frequency domain, somewhat like the sinx/x shapes in the time domain. Called OFDMA - Orthogonal Frequency Division Multiplexing Data can be sent on as many subcarriers as assigned. Depending on channel or subchannel conditions, 2, 4, or 6 bits per pulse per subcarrier, via QPSK or QAM. Base station does all the assigning. Operation in the 2 to 11 GHz range. Data is coded by convolutional coding to allow error correction. Two way sharing is in time: TDD - Time Division Duplex.
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This note was uploaded on 07/16/2011 for the course EE 362 taught by Professor Unknow during the Spring '11 term at Penn College.

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L21 - Broadband wireless IEEE Standard 802.16. High rate...

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