HSIB1RecoveryExamplePlots(channelFigure,sr) Įnb.DuplexMode = 'FDD' % assume FDD duxplexing modeĮnb.CyclicPrefix = 'Normal' % assume normal cyclic prefixĮnb.NDLRB = 6 % Number of resource blocks % plots if (~exist( 'channelFigure', 'var') || ~isvalid(channelFigure))ĬhannelFigure = figure( 'Visible', 'off') % set up some housekeeping variables: % separator for command window logging At this stage we also display the spectrum of the % input signal |eNodeBOutput|. The I/Q waveform needs to be % resampled accordingly. Therefore the bandwidth % is initially set to 6 resource blocks. The primary and secondary synchronization signals (PSS and % SSS) and the PBCH (containing the MIB) all lie in the central 72 % subcarriers (6 resource blocks) of the system bandwidth, allowing the UE % to initially demodulate just this central region. Sr = 1.92e6 % LTE sampling rate % Check for presence of LTE System Toolbox if isempty(ver( 'lte'))Įrror(message( 'sdru:examples:NeedLST')) Įnd % Prior to decoding the MIB, the UE does not know the full system % bandwidth. LTE frames are 10 ms longĮNodeBOutput = reshape(burstCaptures,2) Radio.SamplesPerFrame = 19200 % Sampling rate is 1.92 MHz.
Radio.ChannelMapping = % Receive signals from both channels Radio.DecimationFactor = 96 % Sampling rate is 1.92e6Įrror(message( 'sdru:examples:NeedMIMORadio')) Radio = comm.SDRuReceiver( 'Platform',radiolist(i).Platform. Radio.DecimationFactor = 4 % Sampling rate is 1.92e6Įnd if (strcmp(radiolist(i).Platform, 'X300') ||. Radio.MasterClockRate = 1.92e6 * 4 % Need to exceed 5 MHz minimum Radio = comm.SDRuReceiver( 'Platform', 'B210'. If strcmp(radiolist(i).Status, 'Success') Please refer to the Setup and Configuration section of Documentation for USRP® Radio for details on configuring your host computer to work with the SDRu Receiver System object. In Windows, if two B210 radios are used for these examples, each radio must be connected to a separate computer. The step method outputs a two-column matrix in which the first column is the signal from 'RF A' of the radio and the second column is the signal from 'RF B' of the radio.īefore starting this example, please run sdruLTE2x2SIB1Tx.m in a separate MATLAB session. The ChannelMapping property of the object is set to to enable use of both channels. This example uses the SDRu Receiver System object™. In the end, the SIB1 field, the first of the System Information Blocks, is recovered and the CRC is checked. Since the transmitted signal uses a transmit diversity scheme, orthogonal space frequency block code (OSFBC) decoding is performed by the function lteTransmitDiversityDecode. The LTE System Toolbox™ is used to synchronize, demodulate and decode the signal sent by the accompanying example sdruLTE2x2SIB1Tx.m. This example uses both channels of USRP® B210, X300 or X310 to receive an LTE downlink signal.
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