Zone Definition Tab (802.16 OFDMA)
The tab provides the 802.16 OFDMA signal zone definition defining/editing functionality for defining the measurement analysis zone definitions and the and map file management tools to create, save, and recall zone definition files.
The Zone Definition tab configures these parameters:
- Enable Burst Analysis
- Enable Defined Burst Boosting Levels (Downlink only)
- Definition Source
- Auto-detect (from "---")
mode - the VSA auto-detects the measurement zone definition.
- Zone Number (Downlink only)
- Save Map File (Downlink only)
- Map File mode - a saved zone definition map file is used to define the current measurement analysis zone.
- Manual mode - the zone definition is manually specified for the current measurement.
- Auto-detect (from "---")
mode - the VSA auto-detects the measurement zone definition.
The Definition Zone Panel can be opened to provide these parameters:
- Zone Definition (Downlink only)
- Zone Definition (Uplink only)
-
- New Burst
- Delete Burst
- Activate
- Deactivate
- Selected Burst and Active
(The following parameters are only available when defining a burst.)- Normal
- FCH (Downlink only)
- DLMAP (Downlink only)
- CDMA Code Division Multiple Access: One of several digital wireless transmission methods in which signals are encoded using a specific pseudo-random sequence, or code, to define a communication channel. A receiver, knowing the code, can use it to decode the received signal in the presence of other signals in the channel. This is one of several "spread spectrum" techniques, which allows multiple users to share the same radio frequency spectrum by assigning each active user an unique code. CDMA offers improved spectral efficiency over analog transmission in that it allows for greater frequency reuse. Other characteristics of CDMA systems reduce dropped calls, increase battery life and offer more secure transmission. See also IS-95. (Uplink only)
- PAPR peak to average power ratio: Peak-to-average power ratio is the ratio of the peak envelope power to the average envelope power of a signal during a given period of time. (Uplink only)
- FFB (Uplink only)
- Rectangular/Wrapped
- Symbol
- Subchannel
- Data Tone Modulation
- Boosting Level (Downlink only)
- STC Mode (Uplink only)
- Pilot Pattern (Uplink only)
Most measurements use the Data Burst analysis mode. The map file management tools can be used (including Edit Map Files, Decode to Map File, and Save Map File, etc) to create, edit, save and recall map files, see Using Map Files.
Burst Type "Gap" parameter (Uplink Only)
The current Burst Type parameter provides the flexibility to specify many different uplink subframe burst definitions including: CDMA (i.e. "Ranging"), PAPR, or FFB allocations within an UL Up Link (reverse link: from cell phone to base station)-PUSC partial usage of subchannels: Some of the subchannels are allocated to the transmitter. zone definition. Prior to the Burst Type parameters, the legacy VSA application used the "Gap" parameter for Uplink zone definitions.
To generate a CDMA burst which replicates a "Gap" of 1 slot, create a new burst and change the "burst type" to CDMA, then change the dimensions of the burst to occupy all subchannels over an entire slot. This burst definition process allows you to define CDMA, PAPR, or FFB allocations within the zone that occupy only a subset of subchannels located anywhere within the zone. No measurements are made of the PAPR or FFB regions, but are accounted for in the UL-PUSC subchannel mapping.
See Also
