Answering questions that may arise related to the meaning of portions of an IEEE standard concerning specific applications.

IEEE Standards Interpretation for IEEE Std 802.16.2™-2001 IEEE Standard for Local and Metropolitan Area Networks - IEEE Recommended Practice for Local and Metropolitan Area Networks Coexistence of Fixed Broadband Wireless Access Systems

Copyright © 2001 by the Institute of Electrical and Electronics Engineers, Inc. 3 Park Avenue New York, New York 10016-5997 USA All Rights Reserved.

This is an interpretation of IEEE Std 802.16.2-2001.

Interpretations are issued to explain and clarify the intent of a standard and do not constitute an alteration to the original standard. In addition, interpretations are not intended to supply consulting information. Permission is hereby granted to download and print one copy of this document. Individuals seeking permission to reproduce and/or distribute this document in its entirety or portions of this document must contact the IEEE Standards Department for the appropriate license. Use of the information contained in this document is at your own risk.

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7 September 2001

Interpretation Request #1
Topic: Recommended Practice for Coexistence of Fixed Broadband Wireless Access Systems Relevant Clause: 6.1.3 (Out-of-block unwanted emissions) Relevant Figure: Figure 7

Subclause 6.1.3, Out-of-block unwanted emissions of IEEE Std 802.16.2-2001 presents a block edge mask. Figure 7 ("example of application of unwanted emission limit") and the associated text could be read to imply that a single-channel emission mask corresponding to the transmitted spectrum in the figure is a requirement. Is this the intent of the recommended practice on this topic?

Interpretation Response #1
Subsection 6.1.3, Out-of-block unwanted emissions of the Recommended Practice for Coexistence of Fixed Broadband Wireless Access Systems relates to out-of-block unwanted emissions. Figure 7 provides an example application of out-of-block unwanted emission limits. The transmitter spectrum shown in the figure is an example of a typical actual spectrum for one possible channel bandwidth. It shows the relationship between the placement of the example carrier and the block edge mask, so as to meet the recommended out-of-blocks limits.

It is not an emission mask and there is no intention to imply the use of any particular mask. The system designer is free to choose the levels and placement of carrier frequencies in order to meet the recommended out-of-block emission limits.

Note: This interpretation was unanimously approved by the IEEE 802.16™ Working Group on Broadband Wireless Access on 13 July 2001.