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| WLAN(IEEE 802.11 abg) Signal Generation Solution |
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| Overview |
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Signal sources are needed in R&D (or Production) for testing RF modules to evaluate basic WLAN Receiver functionality and when new RF designs are being evolved. Engineers now have a highly precise and flexible signal generation solution to do so.
WiLANTA LVSG11bg is a comprehensive software for generating IEEE 802.11b and IEEE 802.11g compliant signals (including their PHY+MAC layers) in the 2.4 GHz ISM (Industrial Scientific and Medical) band. WiLANTA LVSG11bg seamlessly integrates with the NI PXI RFSG 5670 to generate ideal and/or impaired IEEE 802.11b/g compliant RF signals, providing the user with complete control over the MAC frames (Management, Control and Data).
It facilitates configuration of all the MAC frame fields as mentioned in the standard along with duration ID (lets you to set the network allocation vector field and amount of time the frame occupies the channel). WiLANTA LVSG11bg generates multiple frames (i.e., frame sequences) in just one click. The sequence can be a combination of various frame types. This saves the time spent on configuring individual frame types.
The measurement set includes Power Spectral density plot, IQ Plots, Transmitter Power Plot, Constellation and Eye diagrams. |
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| Features |
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| Standards Supported |
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IEEE 802.11g |
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IEEE 802.11b |
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| Supported frequency range |
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2.4 GHz band |
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| Data Rates Supported |
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1,2,5.5,6,9,11,12,18,24,36,48,54 Mbps |
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| Modulation formats Supported |
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OFDM |
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CCK/DSSS |
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Supports all the Sub Frame types
mentioned in standard |
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Measurements |
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IQ plot |
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Constellation Diagram |
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Transmit power plot |
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Power Spectrum plot |
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CCDF plot |
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Generate multiple frames or sequence
of frames in one shot |
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| Mode of Transmission |
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| Continuous mode transmission |
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Modulated Spectrum |
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Unmodulated Carrier |
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| Burst mode transmission |
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Packet transmission |
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| Data configuration patterns |
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User defined pattern |
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Predefined pattern |
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Text message |
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PRBS (PN Sequence) |
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| Impairments Supported |
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Memoryless Nonlinearity |
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AWGN (Additive White Gaussian Noise) |
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Frequency Offset |
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DC Offset |
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I/Q gain imbalance |
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Quadrature skew |
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Phase noise |
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| Configurations |
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Enable/Disable MAC configuration |
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Enable/Disable Impairments Configuration |
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Enable/Disable Scrambler |
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Adjust transmit frequency |
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Configure Output Power |
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| Display Parameters |
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Standard |
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Modulation |
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Data Rate |
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Number of packets transmitted |
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Data Payload (Octets) |
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Impairments Applied |
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Network Type |
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Frame and subframe Type |
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Destination and Source Addresses |
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BSSID |
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FCS |
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Entire Frame Body |
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| Extensive Graphical capabilities |
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User defined plot color and style of lines |
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Zoom |
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Markers |
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| Set up |
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| Table 1: WLAN Standards Supported |
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| Full control over MAC Frames |
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| WiLANTA LVSG11bg provides the functionality to generate all IEEE 802.11b/g MAC frames mentioned in the standard. WiLANTA LVSG11bg facilitates the configuring of various frame fields such as Frame type, sub frame type, Network type, Destination address, Source address, BSSID, Duration ID (Set NAV, time occupied by frame), Fragment number, and Sequence number. The generator offers Enabling/ Disabling of WEP Encryption and retransmission of previous frames. The power management status can be set as ‘Active Mode’ or ‘Power Saving Mode’. |
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| Figure 1: IEEE 802.11b/g MAC Frame Format |
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| Table 2: IEEE 802.11b/g MAC Frame and Sub Frame types supported by WiLANTA LVSG11bg |
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| Generate impaired signals |
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| For simulation purpose WiLANTA LVSG11bg allows modeling and viewing of various impairments. The addition of these impairments transforms WiLANTA LVSG11bg from ideal signal generation solution to Signal+noise generator solution. |
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Memoryless Nonlinearity |
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AWGN (Additive White Gaussian Noise) |
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Frequency Offset |
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DC Offset |
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I/Q gain imbalance |
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Quadrature skew |
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Phase noise |
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| Figure 2: Impairments Configuration |
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| Generate multiple frames at one shot |
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To communicate with a device it is required to generate different kinds of frames such as RTS frames, association requests, and so on. This process is time consuming and involves delay between frames.
WiLANTA LVSG11bg reduces time and delay by allowing the user to transmit multiple frames one after the other in just one click. The frame sequences can be a combination of data, management and control frames that include sub-frames. |
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| Figure 3: Build Sequence of Frames – Advanced Settings |
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| Visualize your signal with Graphical capabilities |
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| WiLANTA LVSG11bg supports various graphical features to better visualize the signal. Change the appearance of the plot by changing the color, thickness, and style of lines. Markers (horizontal and vertical) help you to spot coordinate positions and read the signal values. WiLANTA LVSG11bg provides five different zooming options to investigate the signal in detail. |
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| IEEE 802.11b/g signal generation solution is available in two versions |
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| To View Advantages Click Here |
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