user manual
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1. A card and four cables for power supply see Fig 3 The switches control whether an L M pair belongs to Control Group 1 or Control Group 2 where one of these groups corresponds to the group that is situated in the point of focus and the other group belongs to the MIMO array Which one of the two groups that is situated in the point of focus must be set in the software All L M pairs in the same group will always have the same mode of operation That is all L M pairs belonging the same control group will always be in either microphone mode or loudspeaker mode at the same time On top of the box there is a picture showing which switch that controls which L M pair The picture also tells that an L M pair belongs to Control Group 1 if its corresponding switch is switched upwards and that an L M pair belongs to Control Group 2 if its corresponding switch is switched downwards On top of the box there is also a hole for the connection to the A D card Figure 4 The back panel of the Distribution Box The mapping between color and voltage for the power supply cables is listed in table 1 Table 1 Mapping of color and voltage for the power supply cables Color of power supply cable Voltage Yellow 5 V Black Ground Blue 11V Red 11V 2 3 Power Supply Unit The power supply unit for the Distribution Box is named University Power 3535 and has a total of five connections Two belong to the output channel with output ra2. D LAN d Massive Audio Beamforming 2014 12 11 USER MANUAL Fredrik Stenmark Version 1 1 Status Reviewed Christoffer Ring 2014 12 03 Approved with rest list Christopher Moll n 2014 12 05 TSKS05 Communication Systems CDIO User Manual i 4 Massive Audio Beamforming PROJECT IDENTITY HT 2014 Link ping University ISY 2014 12 11 Name Role Phone E mail Anton Eriksson Hardware Designer 0736143063 anter 592 student liu se Christoffer Ring Documentation Manager 0738133863 chrri226 student liu se ee Test Manager 0707395508 jbakogia gmail com Fredrik Stenmark Project Manager 0703823561 frest522 student liu se Magnus Thal n Chief of Design 0705190977 magth371 student liu se Customer Christopher Moll n christopher mollen liu se 013 28 26 43 Examiner Danyo Danev danyo isy liu se 013 28 13 35 Supervisor Antonios Pitarokoilis antonios pitarokoilis liu se 013 28 13 40 TSKS05 Communication Systems CDIO User Manual D RAR 4 Massive Audio Beamforming 2014 12 11 Table of Contents 1 Introduction 2 System Components 2 1 The Computer 2 2 The Distribution Box 29 POWer DIEU tee see EE ee titted eet 3 2 4 L M Pair 2 5 USB Power Adapter 2 6 Connection Cables 3 Setting up the system 4 Using the system 4 1 Specifying User Defined Parameters 4 2 Displaying Data 4 3 RUNING a Demonstrations 2 eeckteekteek cael N E geddeple idea taeletnteeseonsoee 6 TSKS05 Communicatio
3. efault value 4 where o Q No data is displayed o Difference in power in dB between received signal of L M unit in the PoF and verifier is displayed in the command window o 2 Power spectral densities of the received signals of L M unit in the PoF and verifier are displayed o 3 The received signals of L M unit in the PoF and verifier are displayed in one plot o 4 All of the above is displayed 4 2 Displaying Data The result is displayed as MATLAB plots according to the user defined parameter regarding the plotting of data All other signal data that the system is handling is displayed in the workspace to the right in the MATLAB window There are several ways of displaying this data if the user wishes although it may require some knowledge of the MATLAB syntax 4 3 Running a Demonstration After inputting the user parameters the system will run a demonstration based on those parameters The user is then prompted to run the same demonstration again using the same parameters or to quit To effectively demonstrate the effects of massive MIMO it is desirable to be able to see a clear difference between the signals received in the PoF and somewhere around it Therefore the L M unit intended to be in the PoF should always receive a signal of greater power than the verifier This could be shown by using some of the optional data displayed If for example display alternative or 4 is used the difference in dB betwee
4. ibution Box using the 9 pin D sub connector cable labeled number one The numbering of the connections on the Distribution Box are specified in the picture found on top of the Distribution Box 4 Connect the power cables of the Distribution Box such that the yellow cable is connected to the yellow connection on the power supply unit the black cable is connected to one of the blue connections on the power supply unit the blue cable is connected to the black connection on the power supply unit and the red cable is connected to the red connection on the power supply unit Also make sure that the blue connections on the power supply unit are connected in order to have the same ground in the system 5 Connect the USB cables from each L M pair to the USB power adapters 6 Power the system by connecting the power cable of the computer the power cable of the power supply unit and the USB power adapters to power plugs 7 Decide which L M pairs that will be in which group by using the switches on the backside of the Distribution Box All L M pairs in the same group will have the same mode of operation at the same time i e there is one group for the point of focus PoF and one group for the MIMO array It is recommended that L M pair number 5 is used at the PoF as mentioned This means that this pair is not included in the MIMO array but instead placed in front of it This pair should therefore be switched to the group that is in the software la
5. ls N BN AE E z Figure 1 Presentation of components in the system TSKS05 Communication Systems CDIO User Manual 1 D OR Massive Audio Beamforming 2014 12 11 NIN 2 1 The Computer Except ordinary computer components the computer consists of the A D card of type Contec AD12 64 PCI and a D A card of type Contec DA12 16 PCI Connections to these cards are found at the backside of the computer see Fig 2 The top slot in the picture is the D A connection and the slot under it in the picture is the A D connection The computer runs Windows 7 and has MATLAB installed in order to run the software programs Also a library called ML DAQ is installed in order to fetch and send data from and to the D A and A D card F igure 2 The computer back panel with A D and D A slots 2 2 The Distribution Box The Distribution Box provides connections between the computer and the L Ms On the front panel there are connections for the L M pairs see Fig 2 There are 23 connections but only 8 out of these are used This means that the remaining connections can be used for future extensions A picture on top of the box specifies which connections that are active F igure 3 The distribution box The figure shows the front panel containing the D sub connectors for the L M pairs TSKS05 Communication Systems CDIO User Manual 2 D AAA Massive Audio Beamforming 2014 12 11 On the backside there are eight switches one connection for the D
6. n Systems CDIO User Manual iii D RNA 6 Massive Audio Beamforming 2014 12 11 MII Document History Version Date Changes Performed by Reviewed 2 All group Christoffer 1 0 2014 12 03 First version members Ring 1 1 2014 12 08 Changes according to rest list Christoffer Ring Fredrik Stenmark TSKS05 Communication Systems CDIO User Manual DADA Massive Audio Beamforming 2014 12 11 D e 1 INTRODUCTION The purpose of this document is to provide a user guide for how to use the massive MIMO beamforming system The system is designed to demonstrate one of the powers of massive MIMO beamforming namely that signal energy can be focused to a specific point of interest and at the same time be suppressed essentially everywhere else 2 SYSTEM COMPONENTS The massive MIMO beamforming system consists of the following parts which can also be found in Fig 1 e One computer with A D card Contec AD12 64 PCI D A card Contec DA12 16 PCI and installed massive MIMO beamforming software 1 e One Distribution Box 2 e One power supply unit that can generate 11 V 11 V 5 V and ground where the ground for 11 V and 5 V are common The power supply used in this user guide is named University Power 3535 3 s Eight L M pairs 4 e Four USB power adapters 5 e One 37 pin D sub connector cable 6 e One 96 pin PCA connector cable 7 e Eight 9 pin D sub connector cables 8 Sissy ACS SSS p Ta
7. n the received signal power will be printed which is a quick way of verifying the MIMO effects TSKS05 Communication Systems CDIO User Manual 6
8. nge 4 6 V DC where one connection is positive and the other is ground The other three connections belong to the second output channel consisting of one negative and one positive connection with ranges 11 16 V DC and 11 16 V DC respectively The voltage outputs are relative to the ground of this channel which constitutes the third connection In the system setup the ground of the two channels are connected so that all voltage levels of the power supply unit is relative to the common ground of the entire system The Power Supply Unit has two controls controlling each channel output level individually The minus and plus pole of the second channel are hence simultaneously adjusted by the second control Fig 5 shows the power supply unit in more detail TSKS05 Communication Systems CDIO User Manual 3 D DAA 4 Massive Audio Beamforming 2014 12 11 University Power 3535 n mi RH i Ce Ge i E Figure 5 The Power Supply Unit 2 4 L M Pair L M stands for Loudspeaker Microphone since the loudspeakers are able to operate as both One L M pair consists of two L M units one master and one slave The master loudspeaker has a 9 pin D sub connector on top of it The L M pair is powered through its USB cable and shines blue from the bottom when it is powered The master loudspeaker has a volume control on the backside and this control alters the volume of both the master and the slave when the pair operates in louds
9. o the only configuration for which the system at this point will work TSKS05 Communication Systems CDIO User Manual 5 D RANIA 6 Massive Audio Beamforming 2014 12 11 MMV at all The other configuration is for using only one group of L M pairs i e using an external source of sound emitting from the PoF s The L M group in the PoF This parameter can only be set when the number of L M groups is 2 and it specifies which L M group that will be in the PoF It can take the values 1 or 2 The default value is 2 s The L M pair to be in the PoF It can take all integers from 1 to the chosen amount of L M pairs Default value is 5 e Which one of the L M units to be verifier and which one to be the one at the PoF The input is either number 1 for master or 0 for slave Default number is 1 s The signal frequency This means the frequency of the tone that will be generated as pilot signal in Hertz It can take positive scalar integer values from 300 to 3000 Hz The default value is 502 Hz s The signal duration This means for how long time the signal will be transmitted from the MIMO array in seconds It can take values from 1 to 30 seconds The default value is 1 second recommended values are values in the interval 1 2 seconds It should in this context be mentioned that the time the PoF transmits sound is locked to second e What to plot This means the mode of plotting operation It can take the values 0 1 2 3 or 4 d
10. peaker mode Fig 6 Shows the L M pair F igure 6 he L M pair and the master L M from different angles 2 5 USB Power Adapter The USB Power Adapter for the L M pairs is a simple Skross USB travel charger with two outputs It is connected to a wall outlet and delivers an output DC voltage level of 5 V per output 2 6 Connection Cables The connection between the L M pairs and the Distribution Box consists of D sub cables with a 9 pin plug on both ends each of length 1 8 m The cable between the Distribution Box and the D A converter of the computer is a D sub cable with a 37 pin plug on both ends The connection between the Distribution Box and the A D converter of the computer consists of a 96 pin PCA connector cable TSKS05 Communication Systems CDIO User Manual 4 D RANIA 6 Massive Audio Beamforming 2014 12 11 MMV A SETTING UP THE SYSTEM In order to get the system to work the following steps must be carried out 1 Connect the computer and the Distribution Box by connecting the A D card with the connector inside the Distribution Box using the 96 pin PCA connector cable 2 Also connect the computer and the Distribution Box by connecting the D A card with the connector on the backside of the Distribution Box using the 37 pin D sub connector cable 3 Connect each L M pair to the Distribution Box using the 9 pin D sub connector cables L M pair number one shall always be connected to connection number one on the Distr
11. tter chosen to be in the PoF The system is developed and tested for a system configuration where the L M units are placed in a half circle with radius 1 1 5 m and individually spaced at least 20 cm from each other The future use of the system will include other setups but the functionality and hence also the strength of the demonstration may then be limited A more detailed instruction of how to use the system is delivered in the following section section 4 4 USING THE SYSTEM The interaction with the system is enabled through the software installed on the computer To start the massive MIMO beamforming software start MATLAB and run Controller_Main m The program will prompt for user defined setup or standard setup where standard setup means the recommended setup described in section 3 4 1 Specifying User Defined Parameters In order to specify user defined parameters choose the user defined setup alternative when being prompted at the start up of the program This will start a parameter initialization procedure The parameters that can be user defined are s The amount of L M pairs This means the amount of L M pairs that will be used in the system It can take all scalar integer values from 1 to 8 The default value is 8 The number of L M groups This means how many groups there will be for L M pairs to be put in either 1 or 2 The default value is 2 one group at the PoF and one group for the MIMO array This is actually als
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