digital pulse compression module ci f04 / ci f05 compressor march 1 5 th , 2013 ci f04 / ci f05 compressor revision a 3 1 / 8 www. rakon .com to make an enquiry please email: info@rakon.fr product description ci f04 and ci f05 are digital pulse compressors that perform matched filtering of a radar return signal. ci f04 is a sta nd alone single channel c ompre ssor with if analog i/os while ci f05 is a dual channel compressor with if analog i/os. both products may be customized to match linear or non linear chirps to generate compressed pulse. ci f0x may be used as a replacement of existing saw based pulse comp ressor to overcome device obsolescence or enhance radar performances. ci f0x compressor behavio r and performances are reproducible from one unit to the other. no matching is needed. rakon - temex will customize pulse compression filter according to the chara cteristics requested by the customer (chirp duration, bandwidth, compressed pulse width, chirp slope ) . the compressor unit is provided with fpga firmware loaded , including pulse compression filter. features digital pulse compression unit ci f04 : on e compressor channel with if analog i/os ci f05 : two independent compressor channels with if analog i/os 2 selectable waveforms for each channel high precision clock bite function high bxt compression gain applications saw based pulse compression ra dars upgrade note: in this entire document, ci f0x stands for ci f04 or ci f05
digital pulse compression module ci f04 / ci f05 compressor march 1 5 th , 2013 ci f04 / ci f05 compressor revision a 3 2 / 8 www. rakon .com technical description ci f04 compressor functional block diagram is featured on fig. 1 while ci f05 bloc k diagram is featured on fig. 2 . fig. 1 : ci f04 compressor functional block diagram fig. 2 : ci f05 compressor functional block diagram input chirps are filtered (anti - aliasing filte r), sampled and down - converted to baseband. i a nd q baseband data are processed by fir filters w hose coefficients are matched with the expander chirp characteristics . digital baseband i/q compressed pulse is then up - converted to carrier frequency and converted into analog sign al . as inputs and outputs are if analog signals, ci f0x are well suited to upgrade saw based pulse compression radars . for better compatibility with old saw based subsystems, an adjustable additional delay may be inserted. ci f05 unit is able to process on - the - fly 2 inde pendent and concurrent channels . fig. 3 gives the maximum chirp duration value vs. b andwidth achievable for each channel. consider for b the maximum bandwidth value of the 2 waveforms, and for t the maximum time dur ation value of the 2 waveforms. the internal low noise system clock is self - sufficient, and does not need to be referenced on any external clock. ci f0x unit is provided with fpga firmware loaded. functions, and channels specifications (time dispersion, c ompressed pulse width, side lobes level ) should be provided by customer; rakon - temex will customize the fpga program to fulfill customer requirements. for each channel, waveform is selected among 2 possible waveforms, using wfmsel_x inputs , as presented in table 1 and table 2 . each time wfmsel_x signal changes, the new set of waveform coefficients will be active 50 s later. ci f0x unit continuously mon itors internal power supply and fpga program integri ty . if voltage exceeds nominal levels, or if fpga program is corrupted, bite output is deasserted , and led is turned off . the bite output indicates the go - nogo state of the compressor. to ba seba nd fir filter power control connect jta g program fpga fpga to f0 sy stem clock superv ision bit e bo ard_ok in_ a out_a power s upply wa veform selection wf ms el_a adc da c adc to bas eband fir filter to f0 dac to bas eband fir filter power control out_b connect jtag program fpga fpga to f0 sys tem clock supervis ion bite board_ok in_a in_b out_a power supply waveform selection wfmsel_a wfmsel_b adc dac
digital pulse compression module ci f04 / ci f05 compressor march 1 5 th , 2013 ci f04 / ci f05 compressor revision a 3 3 / 8 www. rakon .com table 1 : waveform a selection wfmsel_a wavefo rm 0 waveform a0 (t b d) 1 waveform a1 ( tbd ) table 2 : waveform b selection (ci f05 only) wfmsel_b waveform 0 waveform b0 ( tbd ) 1 waveform b1 ( tbd ) fig. 3 : accessible b x t area specificatio ns 1 environmental condi tion s line parameter test condition min. typ. max. unit procedures and conditions refer to mil - std - 810g 1.1 temperature o perating - 25 + 6 0 c 1.2 temperature s torage - 40 +85 c 1.3 humidity operating @ 30 c, (non condensi ng) 9 5 % rh 1. 4 shock 11 ms, 3 axes, 2 dir, half sine pulse 30 g 1. 5 random vibration 20 to 5 00 hz, 3 axes 0.1 g 2 /hz 1. 6 emi - emc in accordance with mil - std 461 e
digital pulse compression module ci f04 / ci f05 compressor march 1 5 th , 2013 ci f04 / ci f05 compressor revision a 3 4 / 8 www. rakon .com 2 electrical interface line parameter test condition min. typ. max. unit po wer supply 2.1 voltage 11 26 v 2.2 current @ power supply = 15 v 600 ( 1 ) ma rf input signals r efers to in _a, in _ b 2.3 maximum i nput level 10 dbm 2.4 input noise floor inside chirp bandwidth - 130 dbm/hz 2.5 vswr 1. 3 :1 rf output signa ls refers to out_a, out_b 2.6 maximum o utput level 1 0 dbm 2.7 output noise floor inside chirp bandwidth - 150 dbm/hz 2.8 vswr 1. 3 :1 rs - 422 control input s refers to wfmsel_a, wfmsel_b inputs 2.9 impedance 120 2.10 setup time to clock rising edge 50 ns 2.1 1 hold time from clock rising edge 50 ns 1 current highly depends on waveform characteristics (b, t, )
digital pulse compression module ci f04 / ci f05 compressor march 1 5 th , 2013 ci f04 / ci f05 compressor revision a 3 5 / 8 www. rakon .com 3 ci f04 c ompressor operation performances line parameter test condition min. typ. max. unit note: values given bellow are typical values given as a rough guide. depending on the re quired parameters (b, t,) other limitations may rise, e.g. side lobe levels highly depends on bandwidth (b) and time dispersion - 3db highly depends on bandwidth (b), 3 .1 center frequency (f0) 100 C 3 .2 maximum bandwidth (b) 45 mhz maximum t ime dispersion (t) 3.3 b < 3 mhz 950 s 3. 4 b < 7 mhz 170 s 3. 5 b < 20 mhz 17 s 3. 6 minimum compress ed pulse width @ - 3 db ( - 3db ) 35 ns 3. 7 side lobe level (sll) 35 to 45 db 3. 8 minimal compressor delay (tc) measured from the center of the input chirp, to the center of the compressed pulse output t/2 + 2.5 s 3. 9 maximal additional compressor delay (tc) measured from the center of the input chirp, to the center of the compressed pulse output 1 ms 3.10 cw insertion loss @ f0 10 db 3. 1 1 modulation slope up - chirp / down - chirp 3.1 2 modulation type linear / non linear
digital pulse compression module ci f04 / ci f05 compressor march 1 5 th , 2013 ci f04 / ci f05 compressor revision a 3 6 / 8 www. rakon .com 4 ci f05 c ompr essor operation performances line parameter test condition min. typ. max. unit note: values given bellow are typical values given as a rough guide. depending on the required parameters (b, t,) other limitations may rise, e.g. side lobe levels highly de - 3db highly depends on bandwidth (b), the following parameter apply to each of the 2 channels (a and b) 4.1 center frequency (f0) 100 C 4.2 maximum bandwidth (b) 29 mhz maximum time dis persion (t) 4.3 b < 3 mhz 260 s 4. 4 b < 7 mhz 45 s 4. 5 b < 20 mhz 4 s 4. 6 minimum compressed pulse width @ - 3 db ( - 3db ) 35 ns 4. 7 side lobe level (sll) 35 to 45 db 4. 8 minimal compressor delay (tc) measured from the center of the input chirp, to the center of the compressed pulse output t/2 + 2.5 s 4. 9 maximal additional compressor delay (tc) measured from the center of the input chirp, to the center of the compressed pulse output 1 ms 4.10 cw insertion loss @ f0 25 db 4. 1 1 modulation slope up - chirp / down - chirp 4.1 2 modulation type linear / non linear
digital pulse compression module ci f04 / ci f05 compressor march 1 5 th , 2013 ci f04 / ci f05 compressor revision a 3 7 / 8 www. rakon .com mechanical features 5 mechanical features line parameter test condition min. typ. max. unit 5 .1 unit outline without connectors 1 8 5 x 152 x 27.1 mm 3 5 . 2 unit weight < 0.6 kg 5 .3 material ag4.5mc 5 .4 treatment ni15 / zn1 5 .5 screw s a4 - 70 stainless steel fig. 4 : m echanical drawing (connectors position t b c) reliability 6 reliability information line parameter test c ondition value unit 6 .1 estimated mean time between failure fides 2004, 30c ambient > 2 50 000 h
digital pulse compression module ci f04 / ci f05 compressor march 1 5 th , 2013 ci f04 / ci f05 compressor revision a 3 8 / 8 www. rakon .com interfaces description 7 interfaces description line pin number name description j1 to j4 : sma C 7 .1 j1 in _ a rf chirp input ac, 50 7 .2 j2 (ci f05 only) in_b rf chirp input ac, 50 7 .3 j3 out_a rf compressed pulse output ac, 50 7 .4 j4 (ci f05 only) out_b rf compressed pulse output ac, 50 fl01 to fl0 2 : by - pass filter 7 . 5 fl01 power supply power supply 7 .6 fl02 powe r supply return power supply return p1 : mil - c - 24308 15 - pin subd connector 7.7 p1 C 3 / p1 C 11 wfmsel_a +/ - channel a waveform selection input rs - 422 compatible input, 120 differential impedance 7.8 p1 C 4 / p1 C 12 (ci f05 only) wfmsel_b +/ - chann el b waveform selection input rs - 422 compatible input, 120 differential impedance 7.9 p1 C 5 / p1 C 13 unit_ok +/ - bite output rs - 422 level, logic 1 = unit ok indicates the go - nogo state of the unit 7.10 p1 C 15 oc unit ok open collector bite input - out put ttl level with 300 ? internal pull - up, logic 1 = unit ok indicates the go - nogo state of the unit may be tied to other oc unit ok to generate a global system ok when 2 or more ci f06 units are used p 3 : molex type 87833 - 1420 7 . 1 1 p 3 jtag jtag inter face for program download
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