CHANNEL SOUNDING USRP 2 GNURADIO Channel Impulse Response

CHANNEL SOUNDING USRP 2 & GNU-RADIO Channel Impulse Response And Coherence Bandwidth Estimation Under : Prof S. N Merchant SPANN LAB, IIT Bombay By: Rohit Sharma Jay Prakash

Channel Sounding Using. USRP 2 & GNU-RADIO Why? : - Motivation Increased Use of Wireless Devices Data-Intensive High Bandwidth Services Strain in capacity of RF Spectrum Most Communication becomes impractical above 10 GHZ in Microwave Region.

Channel Sounding Using. USRP 2 & GNU-RADIO Multipath Effects of Channel Multiple propagation paths: ØLine-of-Sight (Lo. S) and NLo. S Invites Multipath invites: q. Scattering, q. Reflection, q Diffraction. ØChannel Becomes: q. Frequency dependent, q. Time dependent and q. Position dependent. Ultimately Coherence Bandwidth is adversely affected.

Channel Sounding Using. USRP 2 & GNU-RADIO Flow Model

Channel Sounding Using. USRP 2 & GNU-RADIO Apparatus

Channel Sounding Using. USRP 2 & GNU-RADIO Host PC PN code BPSK Modulation Our Transmitter side Flow-Design USRP(Tx) FPGA Interpolation Filters , Cordic DUC DAC Tx Gain RF Board RFX 2400 Up. Conversion Transmitter Antenna

Channel Sounding Using. USRP 2 & GNU-RADIO Our Receiver side Flow-Design USRP(Rx) FPGA Data Flow Daughter Board FPGA Cordic. USRP(RX) Motherboard ADC DDC Rx Host PC

Channel Sounding Using. USRP 2 & GNU-RADIO Host PC(Tx) Flow-chart Host Pc (Transmitter) Gb Ethernet GNU-RADIO USRP 2 PN Sequence Vector Source Unpack_to_pack Digital_bert_tx. py BPSK Differential gray coded Modulation Uhd_Transmitter UHD-DRIVER USRP 2

Channel Sounding Using. USRP 2 & GNU-RADIO Host PC(Rx) Flow-chart USRP 2 Gb Ethernet Host Pc (Receiver) I File Sink Q Data Processing I File Sink(. dat) Read Complex_to_Binary Windowing on Data-Stream Per Pn. Sequence dow/Seq Win

Channel Sounding Using. USRP 2 & GNU-RADIO Data Processing II dow/Seq l Pn-Seq Win Cross Correlated Data Cross_Corr Loca Channel Impulse Response Coherence Bandwidth Estimation Averaged Over Windows Frequency Correlation Function Average FFT Power Delay Profile CIR

Channel Sounding Using. USRP 2 & GNU-RADIO Host PC(Rx) Flow-chart Host Pc (Receiver) Uhd_Receiver GNU-RADIO Demodulator Stream Converter Digital_bert_rx. py File Sink(. dat) UHD-DRIVER Octave Based Post-Processing

Channel Sounding Using. USRP 2 & GNU-RADIO Our Automated-Sounder APPLICATION Requirements: Software ØGnu-Radio 3. 6. 0 ØPython ØOctave ØUHD_Driver (Latest stable) Hardware ØUSRP 2(Tx, Rx) ØTwo PCs ØGb Ethernet

Channel Sounding Using. USRP 2 & GNU-RADIO Our Automated-Sounder APPLICATION

Channel Sounding Using. USRP 2 & GNU-RADIO Impulse Response of a window

Channel Sounding Using. USRP 2 & GNU-RADIO Power Delay of the window

Channel Sounding Using. USRP 2 & GNU-RADIO Channel Impulse Response

Channel Sounding Using. USRP 2 & GNU-RADIO Power Delay of the window

Channel Sounding Using. USRP 2 & GNU-RADIO Power Delay Profile

Channel Sounding Using. USRP 2 & GNU-RADIO Frequency Correlation Function