1. PRESENTED BY OUSSAMA SEKKAT Self-Healing Mixed-Signal Baseband Processor for Cognitive Radios

2. Goal of the project To implement a revolutionary new mixed-signal baseband processor targeting the task of spectrum sensing in cognitive radios. Will use both energy detection and pilot detection

3. Berkeley Emulation Engine 2(BEE 2) The platform:  5 high-performance Xilinx FPGAs (Virtex II Pro 70) each containing a power PC Core  Support for up to 20GB of high speed DDR2 DRAM  FPGAs laid out in a star topology with four user FPGAs in a ring and one control FPGA connected to each user.  User FPGAs each have four independent high speed serial channels which are capable of transferring data at 10Gbps (XAUI interface)  1 Ethernet port.

4. BEE 2 (Topology)

5. BORPH Operating System BORPH:Berkeley Os for ReProgrammable Hardware  Extended Linux kernel that treats FPGA resources as native computational resources.  Provides integral operating system supports for FPGA designs, such as the ability for an FPGA design to read/write to the standard Linux file system. A user process in BORPH, can therefore either be a software program running on a processor, or a hardware design running on a FPGA.

6. BORPH Operating System (cont.)

7. Cognitive radio test bed Front end board contains:  FPGA board  XAUI connection  Baseband processor  Front-end radio

8. Development environment MSSGE tool flow:  Matlab v7.0.4 (R14) SP2  Simulink v6.2 (R14) SP2  Xilinx System Generator v7.1  Xilinx EDK v7.1.02i  Xilinx ISE v7.1.04i  MSSGE libraries (Simulink models etc..)

9. Bee2 setup SSH connection to Bee2 enabled. IP: 128.97.88.153 Can use a modified RS-232 cable to connect to Bee2 as a root. Hardware process example:

10. Counter:

11. Hardware process (cont.)

12. matlab >> bee_xps

13. Hardware process (cont.)

14. In BEE 2: user@bee2%./testborph_oussama_floating_2009_Mar_12_1523.bof & user@bee2% ps PID TTY TIME CMD 26427 pts/6 00:00:00 bash 26488 pts/6 00:00:00 testborph_oussama_floating_2009_Mar_12_1523.bof 26525 pts/6 00:00:00 ps user@bee2% cd /proc/26488/hw user@bee2% ls ioreg ioreg_mode region user@bee2% cd ioreg user@bee2% ls cnt_en cnt_val user@bee2% cat cnt_val 00000000 user@bee2% echo 1 >> cnt_en user@bee2% cat cnt_val 000AC015 user@bee2% cat cnt_val 000ACFF9 user@bee2% echo 0 >> cnt_en user@bee2% cat cnt_val 000ADEF3 user@bee2% cat cnt_val 000ADEF3

15. Data acquisition example Start the user FPGA process: user@bee2%./bee_1_fe_fpga1_2009_Jan_15_1238.bof &

16. Data acquisition example Start the control FPGA process: user@bee2%./bee_cntlfpga_2009_Jan_22_1215.bof &

17. Data acquisition example

18. user@bee2%./init// Initialize front end user@bee2%./status 0// Status for front end 0 --RF-- FE 0: frequency 2445 FE 0: ant_select 0 FE 0: tx_on 1 FE 0: tx_power 7 FE 0: rx_lna_gain 0 FE 0: refadj 0 FE 0: rx_agc 120 --MxFE-- FE 0: clkout1_div 0 FE 0: clkout2_div 0 FE 0: tx_dac_gain 128 FE 0: tx_pga_gain 100 FE 0: tx_two_edges 0 FE 0: tx_inv_sample 0 FE 0: tx_twos_complement 0 FE 0: tx_inv_sync 0 FE 0: tx_q_i_order 0 FE 0: tx_retime 0 FE 0: tx_interpolate 0 FE 0: tx_hilbert 0 FE 0: tx_keep_ve 0 FE 0: rx_pga_a 15 FE 0: rx_pga_b 15 FE 0: rx_dcs_ena 0 FE 0: rx_hs_duty_cycle 0 FE 0: rx_decimate 0 FE 0: rx_hilbert 0 FE 0: rx_keep_ve 0 FE 0: rx_inv_sync 0 FE 0: rx_twos_complement 0 FE 0: rx_retime 0 FE 0: mxfe_spi_raw 0x00000000 FE 0: rssi_config 0x00000000 --TxDatapath-- FE 0: tx_sync_ena 1 FE 0: tx_data_sel 1 FE 0: tx_offset_i 120 FE 0: tx_offset_q 120 FE 0: tx_rate_i 3 FE 0: tx_rate_q 3 FE 0: tx_amplitude_i 0 FE 0: tx_amplitude_q 0 FE 0: tx_stepsize 1000 FE 0: tx_signal_mem_1 0x00000000 FE 0: tx_signal_mem_2 0x000100ff terminal count 255 step size 1 FE 0: tx_signal_mem_3 0x00000001 enable mask 0x1 FE 0: tx_ext_up_dn_ena 0 FE 0: tx_ext_up_dn 0 FE 0: tx_ext_data_i 0 FE 0: tx_ext_data_q 0 --RxDatapath-- FE 0: rx_test_sel 0 FE 0: rx_fft_sel 0 FE 0: rx_set_bias 0 FE 0: rx_resolution 0 --ChipScope-- local: scope 0 --HopControl-- local: hop_config_1 0x00000000 local: hop_config_2 0x00000000

19. Data acquisition example user@bee2%./sigmem spectra/14bit/256_10.txt // load signal from given file user@bee2%./param tx_on 1 // set parameter tx_on of front end 0 to 1

20. Bee2 and CR test bed demo DEMO

21. Next steps Use the./acquire utility to capture received signal and transfer it to BEE2 file system Use the extract_raw script to convert the binary dump file created by the “acquire” utility into a format readable my Matlab Run fft_rx matlab script on the resulting file.