1options:
2  parameters:
3    author: ''
4    category: Custom
5    cmake_opt: ''
6    comment: ''
7    copyright: ''
8    description: Transmit a pre-defined signal (a complex sine) as OFDM packets.
9    gen_cmake: 'On'
10    gen_linking: dynamic
11    generate_options: qt_gui
12    hier_block_src_path: '.:'
13    id: ofdm_loopback_example
14    max_nouts: '0'
15    output_language: python
16    placement: (0,0)
17    qt_qss_theme: ''
18    realtime_scheduling: ''
19    run: 'True'
20    run_command: '{python} -u {filename}'
21    run_options: prompt
22    sizing_mode: fixed
23    thread_safe_setters: ''
24    title: OFDM Loopback Example
25    window_size: 1280, 1024
26  states:
27    coordinate: [8, 12.0]
28    rotation: 0
29    state: enabled
30
31blocks:
32- name: fft_len
33  id: variable
34  parameters:
35    comment: ''
36    value: '64'
37  states:
38    coordinate: [408, 20.0]
39    rotation: 0
40    state: enabled
41- name: freq_offset
42  id: variable_qtgui_range
43  parameters:
44    comment: ''
45    gui_hint: ''
46    label: Frequency Offset (Multiples of Sub-carrier spacing)
47    min_len: '200'
48    orient: Qt.Horizontal
49    rangeType: float
50    start: '-3'
51    step: '.01'
52    stop: '3'
53    value: '0'
54    widget: counter_slider
55  states:
56    coordinate: [528, 548.0]
57    rotation: 0
58    state: enabled
59- name: len_tag_key
60  id: variable
61  parameters:
62    comment: ''
63    value: '"packet_len"'
64  states:
65    coordinate: [288, 20.0]
66    rotation: 0
67    state: enabled
68- name: noise_voltage
69  id: variable_qtgui_range
70  parameters:
71    comment: ''
72    gui_hint: ''
73    label: Noise Amplitude
74    min_len: '200'
75    orient: Qt.Horizontal
76    rangeType: float
77    start: '0'
78    step: '.01'
79    stop: '1'
80    value: '0.1'
81    widget: counter_slider
82  states:
83    coordinate: [704, 548.0]
84    rotation: 0
85    state: enabled
86- name: packet_len
87  id: variable
88  parameters:
89    comment: ''
90    value: '50'
91  states:
92    coordinate: [200, 20.0]
93    rotation: 0
94    state: enabled
95- name: samp_rate
96  id: variable
97  parameters:
98    comment: ''
99    value: '100000'
100  states:
101    coordinate: [504, 20.0]
102    rotation: 0
103    state: enabled
104- name: blocks_stream_to_tagged_stream_0
105  id: blocks_stream_to_tagged_stream
106  parameters:
107    affinity: ''
108    alias: ''
109    comment: ''
110    len_tag_key: len_tag_key
111    maxoutbuf: '0'
112    minoutbuf: '0'
113    packet_len: packet_len
114    type: byte
115    vlen: '1'
116  states:
117    coordinate: [224, 140.0]
118    rotation: 0
119    state: enabled
120- name: blocks_tag_debug_0
121  id: blocks_tag_debug
122  parameters:
123    affinity: ''
124    alias: ''
125    comment: ''
126    display: 'False'
127    filter: '""'
128    name: Rx Packets
129    num_inputs: '1'
130    type: byte
131    vlen: '1'
132  states:
133    coordinate: [352, 508.0]
134    rotation: 0
135    state: enabled
136- name: blocks_throttle_0
137  id: blocks_throttle
138  parameters:
139    affinity: ''
140    alias: ''
141    comment: ''
142    ignoretag: 'True'
143    maxoutbuf: '0'
144    minoutbuf: '0'
145    samples_per_second: samp_rate
146    type: complex
147    vlen: '1'
148  states:
149    coordinate: [80, 300.0]
150    rotation: 180
151    state: enabled
152- name: blocks_uchar_to_float_0
153  id: blocks_uchar_to_float
154  parameters:
155    affinity: ''
156    alias: ''
157    comment: ''
158    maxoutbuf: '0'
159    minoutbuf: '0'
160  states:
161    coordinate: [352, 448.0]
162    rotation: 0
163    state: enabled
164- name: blocks_vector_source_x_0
165  id: blocks_vector_source_x
166  parameters:
167    affinity: ''
168    alias: ''
169    comment: ''
170    maxoutbuf: '0'
171    minoutbuf: '0'
172    repeat: 'True'
173    tags: ()
174    type: byte
175    vector: range(packet_len)
176    vlen: '1'
177  states:
178    coordinate: [16, 132.0]
179    rotation: 0
180    state: enabled
181- name: channels_channel_model_0
182  id: channels_channel_model
183  parameters:
184    affinity: ''
185    alias: ''
186    block_tags: 'True'
187    comment: ''
188    epsilon: '1.0'
189    freq_offset: freq_offset * 1.0/fft_len
190    maxoutbuf: '0'
191    minoutbuf: '0'
192    noise_voltage: noise_voltage
193    seed: '0'
194    taps: 1.0 + 1.0j
195  states:
196    coordinate: [528, 268.0]
197    rotation: 180
198    state: enabled
199- name: digital_ofdm_rx_0
200  id: digital_ofdm_rx
201  parameters:
202    affinity: ''
203    alias: ''
204    comment: ''
205    cp_len: fft_len//4
206    fft_len: fft_len
207    header_mod: '"BPSK"'
208    log: 'False'
209    maxoutbuf: '0'
210    minoutbuf: '0'
211    occupied_carriers: ((-4,-3,-2,-1,1,2,3,4),)
212    packet_len_key: '"rx_len"'
213    payload_mod: '"QPSK"'
214    pilot_carriers: ((-6,-5,5,6),)
215    pilot_symbols: ((-1,1,-1,1),)
216    scramble_bits: 'False'
217    sync_word1: None
218    sync_word2: None
219  states:
220    coordinate: [80, 380.0]
221    rotation: 0
222    state: enabled
223- name: digital_ofdm_tx_0
224  id: digital_ofdm_tx
225  parameters:
226    affinity: ''
227    alias: ''
228    comment: ''
229    cp_len: fft_len//4
230    fft_len: fft_len
231    header_mod: '"BPSK"'
232    log: 'False'
233    maxoutbuf: '0'
234    minoutbuf: '0'
235    occupied_carriers: ((-4,-3,-2,-1,1,2,3,4),)
236    packet_len_key: len_tag_key
237    payload_mod: '"QPSK"'
238    pilot_carriers: ((-6,-5,5,6),)
239    pilot_symbols: ((-1,1,-1,1),)
240    rolloff: '0'
241    scramble_bits: 'False'
242    sync_word1: None
243    sync_word2: None
244  states:
245    coordinate: [480, 76.0]
246    rotation: 0
247    state: enabled
248- name: qtgui_freq_sink_x_0
249  id: qtgui_freq_sink_x
250  parameters:
251    affinity: ''
252    alias: ''
253    alpha1: '1.0'
254    alpha10: '1.0'
255    alpha2: '1.0'
256    alpha3: '1.0'
257    alpha4: '1.0'
258    alpha5: '1.0'
259    alpha6: '1.0'
260    alpha7: '1.0'
261    alpha8: '1.0'
262    alpha9: '1.0'
263    autoscale: 'False'
264    average: '1.0'
265    axislabels: 'True'
266    bw: samp_rate
267    color1: '"blue"'
268    color10: '"dark blue"'
269    color2: '"red"'
270    color3: '"green"'
271    color4: '"black"'
272    color5: '"cyan"'
273    color6: '"magenta"'
274    color7: '"yellow"'
275    color8: '"dark red"'
276    color9: '"dark green"'
277    comment: ''
278    ctrlpanel: 'False'
279    fc: '0'
280    fftsize: '1024'
281    freqhalf: 'True'
282    grid: 'False'
283    gui_hint: ''
284    label: Relative Gain
285    label1: Rx Spectrum
286    label10: ''
287    label2: ''
288    label3: ''
289    label4: ''
290    label5: ''
291    label6: ''
292    label7: ''
293    label8: ''
294    label9: ''
295    legend: 'True'
296    maxoutbuf: '0'
297    minoutbuf: '0'
298    name: Rx Spectrum
299    nconnections: '1'
300    showports: 'True'
301    tr_chan: '0'
302    tr_level: '0.0'
303    tr_mode: qtgui.TRIG_MODE_FREE
304    tr_tag: '""'
305    type: complex
306    units: dB
307    update_time: '0.10'
308    width1: '1'
309    width10: '1'
310    width2: '1'
311    width3: '1'
312    width4: '1'
313    width5: '1'
314    width6: '1'
315    width7: '1'
316    width8: '1'
317    width9: '1'
318    wintype: firdes.WIN_BLACKMAN_hARRIS
319    ymax: '10'
320    ymin: '-140'
321  states:
322    coordinate: [80, 564.0]
323    rotation: 0
324    state: enabled
325- name: qtgui_time_sink_x_0
326  id: qtgui_time_sink_x
327  parameters:
328    affinity: ''
329    alias: ''
330    alpha1: '1.0'
331    alpha10: '1.0'
332    alpha2: '1.0'
333    alpha3: '1.0'
334    alpha4: '1.0'
335    alpha5: '1.0'
336    alpha6: '1.0'
337    alpha7: '1.0'
338    alpha8: '1.0'
339    alpha9: '1.0'
340    autoscale: 'True'
341    axislabels: 'True'
342    color1: '"blue"'
343    color10: '"blue"'
344    color2: '"red"'
345    color3: '"green"'
346    color4: '"black"'
347    color5: '"cyan"'
348    color6: '"magenta"'
349    color7: '"yellow"'
350    color8: '"dark red"'
351    color9: '"dark green"'
352    comment: ''
353    ctrlpanel: 'False'
354    entags: 'True'
355    grid: 'False'
356    gui_hint: ''
357    label1: ''
358    label10: ''
359    label2: ''
360    label3: ''
361    label4: ''
362    label5: ''
363    label6: ''
364    label7: ''
365    label8: ''
366    label9: ''
367    legend: 'True'
368    marker1: '-1'
369    marker10: '-1'
370    marker2: '-1'
371    marker3: '-1'
372    marker4: '-1'
373    marker5: '-1'
374    marker6: '-1'
375    marker7: '-1'
376    marker8: '-1'
377    marker9: '-1'
378    name: Scope Plot
379    nconnections: '1'
380    size: '1024'
381    srate: samp_rate
382    stemplot: 'False'
383    style1: '1'
384    style10: '1'
385    style2: '1'
386    style3: '1'
387    style4: '1'
388    style5: '1'
389    style6: '1'
390    style7: '1'
391    style8: '1'
392    style9: '1'
393    tr_chan: '0'
394    tr_delay: '0'
395    tr_level: '0.0'
396    tr_mode: qtgui.TRIG_MODE_FREE
397    tr_slope: qtgui.TRIG_SLOPE_POS
398    tr_tag: '""'
399    type: float
400    update_time: '0.10'
401    width1: '1'
402    width10: '1'
403    width2: '1'
404    width3: '1'
405    width4: '1'
406    width5: '1'
407    width6: '1'
408    width7: '1'
409    width8: '1'
410    width9: '1'
411    ylabel: Amplitude
412    ymax: '1'
413    ymin: '-1'
414    yunit: '""'
415  states:
416    coordinate: [528, 420.0]
417    rotation: 0
418    state: enabled
419
420connections:
421- [blocks_stream_to_tagged_stream_0, '0', digital_ofdm_tx_0, '0']
422- [blocks_throttle_0, '0', digital_ofdm_rx_0, '0']
423- [blocks_throttle_0, '0', qtgui_freq_sink_x_0, '0']
424- [blocks_uchar_to_float_0, '0', qtgui_time_sink_x_0, '0']
425- [blocks_vector_source_x_0, '0', blocks_stream_to_tagged_stream_0, '0']
426- [channels_channel_model_0, '0', blocks_throttle_0, '0']
427- [digital_ofdm_rx_0, '0', blocks_tag_debug_0, '0']
428- [digital_ofdm_rx_0, '0', blocks_uchar_to_float_0, '0']
429- [digital_ofdm_tx_0, '0', channels_channel_model_0, '0']
430
431metadata:
432  file_format: 1
433